From: Arun Persaud Date: Sat, 7 Dec 2013 18:58:01 +0000 (+0000) Subject: Add web pages on rules of Chess variants X-Git-Url: http://winboard.nl/cgi-bin?p=xboard.git;a=commitdiff_plain;h=4d5a9416969353d11450b39b3b1403405098472a Add web pages on rules of Chess variants --- diff --git a/whats_new/rules/3checks.html b/whats_new/rules/3checks.html new file mode 100644 index 0000000..b34698c --- /dev/null +++ b/whats_new/rules/3checks.html @@ -0,0 +1,365 @@ + +

+Three Checks + + +

+ +

Three Checks

+ +	+ Initial setup + +e1, e8: King + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

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+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

+A King that has not moved before can move two squares in the direction of a Rook that has not moved before, +in which case that Rook is moved to the square the King skipped over. +This is only allowed if all squares between King and Rook are empty, +when the King is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +

General rules

It is not allowed to expose your King to capture.
The game is won by checkmating the opponent's King, or by checking it for the third time.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+You lose when being checked for the third time. +

Strategy issues

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/ASEAN.html b/whats_new/rules/ASEAN.html new file mode 100644 index 0000000..06c1b5e --- /dev/null +++ b/whats_new/rules/ASEAN.html @@ -0,0 +1,357 @@ + +

+ASEAN Chess + + +

+ +

ASEAN (Association of South-East Asean Nations) Chess

+ +	+ Initial setup + +d1, e8: King + +e1, d8: Ferz + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Elephant + +b1, b8, g1, g8: Knight + +a3-h3, a6-h6: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

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+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+ +
+Ferz +	+Q +	+1.5 +	+F +	+With Cambodian rules its first move can also be two steps forward +
+Rook +	+R +	+5 +	+R +	+ +
+Elephant +	+B +	+2.5 +	+FfW +	+ +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Ferz on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
There is no initial double-push, and thus no en-passant capture.
Pawns promote to Ferz when they reach last rank; there is no choice.

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+The Queen and Bishops are replaced by Ferz and Elephant. +Pawns start on the third rank. +Promotion always to Ferz. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Ferz, Elephant or Knight (in addition to your own King). +Two Knights or two Ferzes cannot do it either. +

+ + diff --git a/whats_new/rules/Atomic.html b/whats_new/rules/Atomic.html new file mode 100644 index 0000000..025e648 --- /dev/null +++ b/whats_new/rules/Atomic.html @@ -0,0 +1,372 @@ + +

+Atomic Chess + + +

+ +

Atomic Chess

+ +	+ Initial setup + +e1, e8: King + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

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:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

General rules

Captures destroy ('explode') both capturer and victim, and also destroy all non-Pawns adjacent to the capture square. +
The game is won by destroying the opponent's King.
Destroying your own King is not allowed.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+Pieces explode on capture, destroying everything in the area including themselves. +You win by destroyig the King rather than checkmating it; +exposing your King to destruction is not forbidden (just stupid). +

Strategy issues

+Since any capturing piece destroys itself in the explosion, Kings can never capture. +

+A King taking shelter next to the opponent's King (which, after all, cannot capture) +is immune to capture, as such a capture would destroy your opponent's King in the explosion. +So many end-games (even KQK) can be drawn by tailing the opponnet's King! +

+ + diff --git a/whats_new/rules/Berolina.html b/whats_new/rules/Berolina.html new file mode 100644 index 0000000..87bf887 --- /dev/null +++ b/whats_new/rules/Berolina.html @@ -0,0 +1,370 @@ + +

+Berolina Chess + + +

+ +

Berolina Chess

+ +	+ Initial setup + +e1, e8: King + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Berolina Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

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+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+ +	+N +
+Berolina Pawn +	+P +	+1 +	+mfFcfW +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (diagonal move, straight capture).
Pawns can move two squares diagonally ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
A diagonal move to the square skipped by the previous Pawn move is thus not an e.p. capture.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+The capture and non-capture move of the Pawns have been swapped. As a result the initial double-push is also diagonal. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/Betza.html b/whats_new/rules/Betza.html new file mode 100644 index 0000000..20ea851 --- /dev/null +++ b/whats_new/rules/Betza.html @@ -0,0 +1,514 @@ + +

+(Extended) Betza notation +

+ +

Extended Betza notation

+Ralph Betza invented a compact notation to encode moves of a piece, +which is now in wide-spread use for description of Chess variants. +This page describes a version of it that has been extended in several ways. +Some of these extensions were embraced from another proposed extension scheme, +'Bex notation' by David Howe, others are entirely new. +These new extensions from the original Betza notation are marked in yellow. +

+Betza notation decomposes the piece into 'atoms', +which represent the set of all (8-fold-)symmetry-equivalent moves of a certain distance. +For example all eight Knight moves, or all diagonal moves of the King. +Each 'atom' is written as a single capital (e.g. N for the Knight moves), +which is very efficient when you are dealing with pieces that are maximally symmetric +(which most pieces indeed are). +Atoms refer to single unblockable leaps of a certain distance. +Pieces that can repeat the same leap again and again until they encounter an obstacle +(sliders or riders, such as Rook) +are very common. +Those moves are indicated by writing the number of steps the piece can maximally make behind the atom, +where '0' can be used to indicate 'any number of steps'. +

+The choice to treat moves as sets that go in all directions goes at the expense of the compactness when dealing with asymmetric pieces. +(This is a cheap price to pay, as asymmetric pieces are much less common than fully symmetric ones.) +To describe moves of asymmetric pieces Betza notation uses lower-case prefixes to identify which sub-set of the atom we mean. +Such as f (forward) or r (right), or combinarions of those like fr. +E.g. fR decribes a 'Rook' that only moves in the forward direction (i.e., the Shogi Lance). +Lower-case prefixes are also used to specify the move is not a general one +(i.e. valid as capture and non-capture, the normal situation in Chess-like games), +but can only be used in limited ways (e.g. capture only, non-jumping, capture after jumping). +

The basic atoms

+The following table describes the most important atoms +

+Atom +	+Vector +	+Piece +
+O +	+(0,0) +	+Null move (Taikyoku-Shogi Lion can do this) +
+W +	+(1,0) +	+Wazir (Courier Chess) +
+F +	+(1,1) +	+Ferz (Shatranj) +
+D +	+(2,0) +	+Dababba +
+A +	+(2,2) +	+Alfil (Shatranj) +
+I +	+(3,0) +	+Tripper +
+L +	+(3,1) +	+Long Knight (aka Camel) +
+J +	+(3,2) +	+Zebra +
+G +	+(3,3) +	+ +

+Laid out on the board, (standing at O),
the move encoding is as follows: +
+. . . . . . . . . +
+. G J L H L J G . +
+. J A N D N A J . +
+. L N F W F N L . +
+. H D W O W D H . +
+. L N F W F N L . +
+. J A N D N A J . +
+. G J L H L J G . +
+. . . . . . . . . +
+

+For longer-range atoms no letters are defined. +In the rare cases they occur, these can be written using the numeric coordinates of their leap vector, +e.g. (4,1) for the Giraffe leap. +Note this still implies the move goes in all directions (i.e. (4,1) also means (4,-1), (-4,1), (1,4), ...), +and thus still does a lot for compactness. +A piece that only leaps 4 forward and 1 left or right would be an f(4,1). +

+ +

Modifier prefixes

+The following table lists possible prefixes to the atoms. +Prefixes can be combined, in which case the sub-sets of move types they correspond to are joined. +E.g. fb means forward and backward moves (but not sideways). +So even prefixes with opposite meaning are not really conflicting; +they could be superfluous, however. +(E.g. mc would mean both non-capture and capture, which is the default in absence of prefixes anyway.) +

+prefix +	+short for +	+meaning +
+Move modality +
+c +	+capture +	+Captures only +
+m +	+move +	+Move but not capture +
+Move blocking +
+n +	+non-jumping +	+Cannot jump over occupied square +
+j +	+jump one +	+Must jump exactly one +
+jj +	+jump many +	+Can jump over any number of pieces +
+Hopping +
+p +	+Pao (=Canon) +	+(Obsolete?) Capture if move jumps over one obstacle, non-capture if it does not jump +
+g +	+Grasshopper +	+(Obsolete?) Must land directly behind first obstacle +
+q +	+Circular +	+(Obsolete?) Basic step repeated at an angle, until it closes on itself +
+z +	+Zig-zag +	+(Obsolete?) Repeat step alternates angle between two values. +
+o +	+ +	+wraps around on cylinder board +
+directional-subset and other geometry indicators +
+f +	+forward +	+most-forward single or pair of moves of symmetry-equivalent moves +
+b +	+backward +	+most-backward single or pair of moves of symmetry-equivalent moves +
+l +	+left +	+left-most single or pair of moves of symmetry-equivalent moves +
+r +	+right +	+right-most single or pair of moves of symmetry-equivalent moves +
+s +	+sideways +	+short for lr +
+v +	+vertical +	+short for fb +
+a +	+all +	+short for vs (default on atoms specifying complete move, but can be needed in chaining) +
+ff +	+forward +	+obsolete notation for forward-most two of 8 symmetry-equivalent moves +
+fh +	+forward half +	+forward-most four of 8 symmetry-equivalent moves +
+fs +	+sideway-forward +	+fh but not f +
+etc. +	+ +	+Similar for b (bb, bh, bs), l and r +
+i +	+initial +	+Initial move only (for pieces that have not moved yet) +
+e +	+equal +	+equal in length to previous step, measured in board steps (see section on chaining) +

+For example, fmWfcF is a Pawn: non-captures forward to a W square, captures to the two forward F squares. +Pretty complicated, but the Pawn is a very complex piece (asymmetric, and divergent capture/non-capture). +Note that fr and rf are not the same on 'oblique' (= not orthogonal or diagonal) atoms, which have 8 moves, +and that they might not be what you intuitively think, as fs = fl + fr. +

Grouping

+Grouping of atoms, modifiers and exponents is possible with parentheses. +This can be done for readability, +or for overruling operator priorities. +(fmW)(fcF) might read more easily than fmWfcF. +The parentheses do not have any meaning in themselves. +'Distributivity' also works for modifier prefixes: +m(AB) where m is a string of modifiers and A and B are atoms, (or expressions grouped in parentheses), +is defined to mean mAmB. +Some shortcuts for commonly used combinations of atoms exist; +these can be seen as implicit grouping of the involved atoms. +

+shortcut +	+stands for +	+orthodox piece +
+K +	+WF +	+King +
+B +	+F0 (FF) +	+Bishop +
+R +	+W0 (WW) +	+Rook +
+Q +	+RB +	+Queen +
+C +	+L +	+Camel +
+Z +	+J +	+Zebra +

+ +

Chaining moves

+When a number of atoms is concatenated, like WF, it joins their move sets. +So the piece described by WF moves either as W or as F, i.e. one step diagonal, or one step orthogonal. +That means it is the King of orthodox Chess! +(From the notation you cannot see whether it is royal yet; +the main purpose of the notation is to convey how it moves. +But a 'k' prefix could be used to indicate royalty, when this is of relevance.) +

+It is also possible to specify that certain moves have to be performed sequentially, one after the other. +For instance because something of importance happens or should be noted on an intermediate square. +Such as for pieces that can be blocked on squares they cannot visit ('lame leapers'), +or that have to hop over other pieces in a specific pattern. +The simplest example of this, however, is repetition of the same step in the same direction, +as in sliding or riding pieces, such as a Rook. +The far moves of such a piece can indeed be blocked by an obstacle closer by on their path, +although it can then always reach that square itself as well. +Such moves are indicated by 'exponentiation': a number after the atom indicates how often the step may be repeated. +E.g. F3 would be a piece that slides diagonally (i.e. like a Bishop), upto a maximum of 3 steps. +To indicate an arbitrary number of steps can be taken, we use 0 (zero) for the exponent. +(This because infinity is not in the ASCII character set, and 0 would be pointless when taken at face value.) +So W0 would be the Rook, sliding arbitrarily far orthogonally, and F0 the Bishop. +(Old notation for this would be WW and FF, but in the extended context these would be troublesome.) +

+Not all multi-step moves are as regular as simple sliders, however. +Some 'bent' sliders can turn corners, for instance. +The 'Griffon' is an example that first moves one step diagonally, and then continues outward as a Rook. +It does not have to go beyond the corner, though; just like a normal Rook it can make the first step of its move only. +And if it encounters something on that first step, it is blocked, and never gets to the rooky part of its move. +To describe this trajectory we cannot use exponentiation, but have to explicitly write the chain: FtR. +Here the 't' is the chaining operator, that distinguishes this from FR, +which would mean a piece that steps one diagonally or moves like Rook (a Shogi Dragon Horse). +The 't' is because of 'and then', but also because the move could be terminated at that point, +and there is no requirement to visit the later parts of the specified trajectory. +

+There are other forms of chaining, where the 'connecting square' can not be visited. +(I.e. no termination there.) +The Xiangqi Horse moves one orthogonal step, and then (without stopping) one step diagonally outward, +mimicking the move of a Knight, but blockable on the intermediate square. +This is written as the chain W-F. +The chaining operator '-' indicates the move cannot be terminated at that point (ending on the connection square), +but must continue. +If it cannot, because the square was occupied, the move described by the chain is considered blocked, and cannot be made. +

+ + + + + + + + + +

+Overview of chaining operators +
t	then	terminate on connection square (if empty or enemy) or continue (if empty).
-	block	must continue if connection square empty; otherwise entire path is considered blocked
+	hop	connection square must be occupied and remains untouched; move must go on from there
?	own	connection square must contain own piece and remains untouched; move must go on from there
!	foe	connection square must contain enemy and remains untouched; move must go on from there
x	capture	connection square must contain enemy, which is captured; move must go on from there
d	destroy	connection square must be occupied, friend or foe there is destroyed; must go on
y	split	connection square is one step before first obstacle; must continue from there

+Chaining implies continuation in the most similar direction. +Should you need to deviate from that, e.g. because the trajectory doubles back on itself, +directional modifiers must be used. +The continuation steps are to be described in a coordinate system relative to the previous step, however. +So W-rW-lW makes one step, (say moving North), then turns right for another step (moving East), and then turns left compared to that second step, +meaning it is moving North again! +So in the end you arrive at (1,2), over (0,1) and (1,1). +This is a Knight move that can only be made if both the intermediate squares are empty, +even worse than the Xiangqi Horse (which at least did not care about (1,1))! +The latter would be described by W-F. +The F after '-' would by default mean fF, and in the orientation of the preceding orthogonal step +this would imply a pair of outward moves, fl + fr. +

+Some examples that use the other operators: +Q+K is the Grasshopper: it must move as Queen to an occupied square (the 'support'), +(the first one it encounters, as Queens do not jump!), +and then continue with a single K step in the same direction (leaving the occupant of the square alone), +to land on the square directly behind the support. +where it can capture or just move. +mRcR+R is the Xiangqi Cannon: the first mR specifies its non-capture move, which is that of a normal Rook. +The concatenated cR+R is the capturing alternative; +it moves as R to an occupied square, and then continues as R in the same direction for a capture. +Note that the 'c' prefix applies to the complete R+R path (a once jumping Rook); +the operator priorities are such that the binary operators t-+xdy couple more tightly than the prefix modifiers mc. +The latter are only allowed in front of a complete path, to specify what you can do at the end of it, +and not on individual steps of the path, where the chaining operators already specify this. +

Weird captures

+The x operator allows description of pieces with unconventional capture, +as it specifies moving away from the capture square. +Normal in Chess is of course that you only captured what was on the square you end on. +But even in orthodox Chess e.p. capture exists as an exception to that. +It could be written as frmWxlW, which, as we have seen, means frm(WxlW) +This expreses capture through a W step, and then turning left for a second W step, +so that overall you make an F step in an L form. +The frm prefix to this F step means that it can not capture on the final square +(the Pawn in e.p. capture always goes to an empty square), +to your forward right. +I.e. you started moving right, then turned left to move forward. +So the continuation square you pass over to remove the Pawn is to your right. +(There is no way to express that you can only do this to Pawns, however, let alone to Pawns that just made a double push.) +

+This shows the general encoding strategy: if you capture pieces not on your destination square, as 'side effect' to the move, +you lay out a path that tramples all the pieces that are captured, so that the sub-steps are all normal replacement captures. +E.g. a Checker would be fmFfmFxF. There the fmF part is the non-capture move, +but the interesting part is the capture: +one step diagonal (which must be to an occupied square, which we capture), +and then straight on (which is now 'forward' in the local frame of reference set up by the first step) +to the next square, for an overall A step. +This step must be fmA, i.e. in one of the forward diagonal directions, not capturing anything on the square where it lands. +'Rifle capture' by a Rook would be RxebR, i.e. first capture something in the normal way, +and then manditorily withdraw in the direction from which you came (b) by an R move of the same length. +No overall move, but the victim is gone! +A Ultima Withdrawer, which destroys the adjacent piece from which it moves away, would be written as +mQmKxbK-Q. The capture part, m(KxbK-Q) specifies capture to the adjacent piece, reversing that step (b) to your square of origin, +and then mandatorily continuing in that direction with a Queen non-capture move (the victim already in your pocket). +The hit-and-run or double capture of a Lion would be KxaK: capture the adjacent piece, +after which you must continue by another King step in any direction relative to the first, capturing a second victim or just moving. +ven the rifle capture (igui) is included in this. +Its turn-passing move would be K-bK. +Which is different from O, because it can only be done if the Lion is adacent to an empty square, +while a piece that has an O atom can pass uncondiionally. +For definiteness, when directional modifiers apply to a path that results in a return to the starting square, +they will be referenced to the direction of the first step of the path. +

More about exponentiation

+Exponentiation by default implies repeated application of the 't' operator. +But it can be used to indicate repeate application of other operators too. +We define AmN, with A an atom or a group within parentheses, m a string of modifiers, and N a number, +to mean AmAmAm...mA with N factors A and N-1 operators between them. +If the modifier string m does not contain one of the chaining operators, it is prefixed with the default 't'. +If it does not include any directional modifiers, it is suffixed with 'f'. +So W3 means WtfWtfW, 1 to 3 orthogonal steps in the same direction (which is what the 'f' specifies). +But W-3 would mean W-fW-fW, which is exactly 3 such steps. +And Wx3 would be exactly 3 steps where the first 2 mandatorily capture. +

+By including directonal indicators, you can describe curved trajectories. +Nrf8 would mean NtrfNtrfN..., upto 8 Knight moves, each consecutive move bending ~45 degrees right from the previous one +(because that is what rf means; the first opportnity to the right that is not straight ahead). +This describes the Rose! +Circular riders fit into the system, and there is no need for a separate prefix to describe them. +With grouping you can do more: (FtlF)r0 expands to FtlFtrFtlFtrFtl..., an arbitrary number of diagonal steps, +that alternately turn 90 degrees left or right. +In other words, the Crooked Bishop. +There is also no real need for the z prefix in this extended Betza notation. +The exponentiation can describe it much more precisely, +specifying exactly how Crooked it is. +

+ + diff --git a/whats_new/rules/CRC.html b/whats_new/rules/CRC.html new file mode 100644 index 0000000..6b69c3a --- /dev/null +++ b/whats_new/rules/CRC.html @@ -0,0 +1,415 @@ + +

+CRC + + +

+ +

Capablanca Random Chess (CRC)

Initial setup

+There is no fixed setup; +the back-rank pieces are randomly shuffled with certain restrictions. +Black's setup is the mirror image of white's, though. +Both sides have: +

+1 King +
+1 Queen +
+1 Chancellor +
+1 Archbishop +
+2 Rooks +
+2 Bishops +
+2 Knights +
+a2-j2, a7-j7: Pawns +

+The Bishops must start on different colors. +The King must start between the Rooks. +It has been suggested the Bishops should also not start next to each other. +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 3 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Chancellor +	+C +	+9 +	+RN +	+ +
+ArchBishop +	+A +	+8.75 +	+BN +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.5 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

+A King that has not moved before can move to the c1/c8 or i1/i8 in the direction of a Rook that has not moved before, +in which case that Rook is moved to the square on the other side next to the King. +This is only allowed if all squares traveled through by King and Rook are empty (after their removal), +when the King is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

+You can use the New Shuffle dialog to control the randomization of the initial position. +

Differences with FIDE

+The Chancellor and Archbishop pieces are extra, and the board is expanded to accomodate them. +Castling is generalized to allow it with non-standard placement of King and Rooks. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +The Archbishop can force checkmate against a bare King. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+As Chancellor and Queen are nearly equal in value to Queen, under-promotion is very common, +and there is virtually never any need to promote to R, B or N. +

+The super-pieces (Q, C, A) devaluate by the presence of lower-valued opponent pieces. +As a result trading Q for R + B is in general a good trade when you still have both J, +as the latter gain in value by eliminating the opponent's R and B, +which is more compensation than the intrinsic value differene between Q and R + B. +

+ + diff --git a/whats_new/rules/CRC.png b/whats_new/rules/CRC.png new file mode 100644 index 0000000..df04bd4 Binary files /dev/null and b/whats_new/rules/CRC.png differ diff --git a/whats_new/rules/CWDA.html b/whats_new/rules/CWDA.html new file mode 100644 index 0000000..cc82970 --- /dev/null +++ b/whats_new/rules/CWDA.html @@ -0,0 +1,589 @@ + +

+Chess with Different Armies + + +

+ +

Chess with Different Armies

+This is actually a group of variants. +It defines a number of 'armies', each containing of an orthodox King and Pawns, +plus 7 other pieces of 4 different types. +The orthodox FIDE army, with pieces Q, R, B and N, is one example of this. +But there are many armies considting of four completely different pieces, +together of approximately equal strength as the FIDE army. +Here we discuss three possible realizations of this. +

+Each of these four armies can be pitted against each of the others, +with either color. +

Initial setup

Remarkable-Rookies army

+e1, e8: King +
+d1, d8: Marshall +
+a1, a8, h1, h8: Short Rook +
+c1, c8, f1, f8: Half Duck +
+b1, b8, g1, g8: Woody +
+a2-h2, a7-h7: Pawns +

Fabulous-FIDEs army

+e1, e8: King +
+d1, d8: Queen +
+a1, a8, h1, h8: Rook +
+c1, c8, f1, f8: Bishop +
+b1, b8, g1, g8: Knight +
+a2-h2, a7-h7: Pawns +

Nutty-Knights army

+e1, e8: King +
+d1, d8: Colonel +
+a1, a8, h1, h8: Turret +
+c1, c8, f1, f8: Unicorn +
+b1, b8, g1, g8: Horse +
+a2-h2, a7-h7: Pawns +

Color-bound Cloberers army

+e1, e8: King +
+d1, d8: ArchBishop +
+a1, a8, h1, h8: Leaping Bishop +
+c1, c8, f1, f8: Clobberer +
+b1, b8, g1, g8: Elephant +
+a2-h2, a7-h7: Pawns +

+ + +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+Common to all armies +
+King +	+K +	+- +	+K +	+Can castle with corner piece +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to any piece specific to the army on reaching last rank +
+FIDE army +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Clobberers army +
+Archbishop +	+A +	+8.75 +	+BN +	+ +
+Leaping Bishop +	+L +	+5 +	+BD +	+Color-bound +
+Clobberer +	+C +	+4.5 +	+FAD +	+Color-bound +
+Elephant +	+E +	+3 +	+WA +	+ +
+Nutters army +
+Colonel +	+C +	+9.5 +	+fRsRKfhN +	+ +
+Turret +	+T +	+5 +	+bKfsR +	+ +
+Unicorn +	+B +	+3.75 +	+fhNbsK +	+ +
+Horse +	+H +	+3 +	+FbbNffN +	+ +
+Rookies army +
+Marshall +	+M +	+9 +	+RN +	+ +
+Short Rook +	+S +	+4.5 +	+R4 +	+ +
+Half Duck +	+B +	+4 +	+HFD +	+ +
+Woody +	+W +	+3 +	+WD +	+ +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice from their own army when they reach last rank.

Castling

+A King that has not moved before can (in general) move two squares in the direction of a corner piece that has not moved before, +in which case that corner piece is moved to the square next to the King on the other side. +This is only allowed if all squares traveled through by King and corner piece are empty (after their removal), +when the King is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +When the corner piece is color-bound, however, the King moves 2 or 3 squares, subject to all other rules mentioned above, +to make sure the piece it castles with stays on the same color. +

General rules

Any army can be pitted against any other.
It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

XBoard interface issues

+Man of the pieces in the various army are quite exotic even by the standards of Chess variants, +and XBoard does not know them. +So Chess with different Armies has to be played with legality testing off, +using pieces XBoard does implement for different purposes. +CwDA is also not an variant name known to XBoard; +it has to be played as the catch-all variant 'fairy'. +This variant can mean anything as far as XBoard is concerned; +you have to tell the engine what you actually want to play, +and then the engine will tell it to XBoard (i.e. which piece symbols to use, in which initial setup). +So CwDA cannot be played without an engine that knows how to play it. +

+Fairy-Max implements various versions of CwDA. +With a combobox in the Engine Settings dialog you can select which version you want to play +(e.g. Clobberers-Nutters) as variant fairy. +When you then select 'fairy' from the New Variant dialog +(or start a New Game when 'fairy' was already selected) +the engine will setup the game for the selected armies. +

Differences with FIDE

+Except for the FIDE army, all armies consist of pieces (not King and Pawns) that move in completely different ways. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +It is not possible to force checkmate on a bare King with just a single Elephant or C or L (in addition to your own King). +A pair CC, LL or CL on unlike colors can force checkmate without help of their King. +A pair of Elephants can checkmate with help of their King. +It is not possible to force checkmate on a bare King with just a single Fibnif or a pair of them (in addition to your own King). +All pieces of the Rookies army can force checkmate against a bare King. +

+Bishops, C and L are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +Combining other color-bound pieces on unlike colors is expected to involve even larger bonuses. +

+ + diff --git a/whats_new/rules/Capablanca.html b/whats_new/rules/Capablanca.html new file mode 100644 index 0000000..5e9e8ab --- /dev/null +++ b/whats_new/rules/Capablanca.html @@ -0,0 +1,400 @@ + +

+Capablanca Chess + + +

+ +

Capablanca Chess

+ +	+ Initial setup + +f1, f8: King + +e1, e8: Queen + +h1, h8: Chancellor + +c1, c8: Archbishop + +a1, a8, j1, j8: Rook + +d1, d8, g1, g8: Bishop + +b1, b8, i1, i8: Knight + +a2-j2, a7-j7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 3 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Chancellor +	+C +	+9 +	+RN +	+ +
+ArchBishop +	+A +	+8.75 +	+BN +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.5 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, C, A, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

+A King that has not moved before can move three squares in the direction of a Rook that has not moved before, +in which case that Rook is moved to the square next to the King on the other side. +This is only allowed if all squares between King and Rook are empty, +when the King is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+The Chancellor and Archbishop pieces are extra, and the board is expanded to accomodate them. +To handle the larger board width, the King moves 3 squares on castling. +

Strategy issues

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+As Chancellor and Archbishop are nearly equal in value to Queen, under-promotion is very common. +

+The super-pieces (Q, C, A) devaluate by the presence of lower-valued opponent pieces. +As a result trading Q for R + B is in general a good trade when you still have A and C, +as the latter gain in value by eliminating the opponent's R and B, +which is more compensation than the intrinsic value difference between Q and R + B. +

+ + diff --git a/whats_new/rules/Capablanca.png b/whats_new/rules/Capablanca.png new file mode 100644 index 0000000..a7ffb98 Binary files /dev/null and b/whats_new/rules/Capablanca.png differ diff --git a/whats_new/rules/Chess.html b/whats_new/rules/Chess.html new file mode 100644 index 0000000..6b3816e --- /dev/null +++ b/whats_new/rules/Chess.html @@ -0,0 +1,369 @@ + +

+Chess + + +

+ +

Chess (aka FIDE, Mad Queen)

+ +	+ Initial setup + +e1, e8: King + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+None. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/Chu.html b/whats_new/rules/Chu.html new file mode 100644 index 0000000..273a249 --- /dev/null +++ b/whats_new/rules/Chu.html @@ -0,0 +1,719 @@ + +

+Chu Shogi + + +

+ +

Chu Shogi (Ancient Japanese Chess)

+Chu Shogi was already known in the year 1250, +and has been the dominant form of Chess in Japan for many centuries. +In recent time, after the invention of piece drops, it was overtaken in popularity by modern Shogi. +It is still widely played in Japan, though. +

Initial setup

+f0, g11: King +
+f2, g9: Lion +
+g2, f9: Queen (Free King) +
+e2, e9, h2, h9: Dragon King +
+d2, d9, i2, i9: Dragon Horse +
+c2, c9, j2, j9: Rook +
+c1, c10, j1, j10: Bishop +
+b2, b9, k2, k9: Vertical Mover +
+a2, a9, l2, l9: Side Mover +
+a1, a10, l1, l10: Canon (Reverse Chariot) +
+a0, a11, l0, l11: Lance +
+f1, g10: Kylin +
+g1, f10: Phoenix +
+g0, f11: Elephant +
+e1, e10, h1, h10: Blind Tiger +
+e0, e11, h0, h11: Gold General +
+d0, d11, i0, i11: Silver General +
+c0, c11, j0, j11: Copper General +
+b0, b11, k0, k11: Ferocious Leopard +
+d4, d7, i4, i7: Cobra (Go Between) +
+a3-l3, a8-l8: Pawns +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Captured while passing through the square to another destination +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+sym +	+Piece name +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+ +	+King +	+K +	+- +	+K +	+ +
+ +	+Lion +	+N +	+ +	+KADN(cK-aK)(K-bK) +	+Can move twice per turn (as King) +
+ +	+Queen +	+Q +	+ +	+RB or Q +	+ +
+ +	+Dragon(-King) +	+D +	+ +	+RF +	+Promotes to Eagle +
+ +	+(Dragon-)Horse +	+H +	+ +	+BW +	+Promotes to Unicorn +
+ +	+Rook +	+R +	+ +	+R +	+Promotes to Dragon +
+ +	+Bishop +	+B +	+ +	+B +	+Promotes to Horse +
+ +	+Vertical Mover +	+V +	+ +	+vRsW +	+Promotes to Narrow Queen +
+ +	+Side Mover +	+S +	+ +	+sRvW +	+Promotes to Sleeping Queen +
+ +	+Canon +	+A +	+ +	+vR +	+Promotes to Whale +
+ +	+Lance +	+L +	+ +	+fR +	+Promotes to White Horse +
+ +	+Kylin +	+O +	+ +	+FD +	+Promotes to Lion +
+ +	+Phoenix +	+X +	+ +	+WA +	+Promotes to Queen +
+ +	+Elephant +	+E +	+ +	+FsfW +	+Promotes to a second King +
+ +	+Blind Tiger +	+T +	+ +	+FsbW +	+Promotes to Flying Stag +
+ +	+Gold +	+G +	+ +	+WfF +	+Promotes to Rook +
+ +	+Silver +	+S +	+ +	+FfW +	+promotes to Vertical Mover +
+ +	+Copper +	+C +	+ +	+fFvW +	+promotes to Side Mover +
+ +	+Ferocious Leopard +	+F +	+ +	+FvW +	+promotes to Bishop +
+ +	+Cobra +	+I +	+ +	+vW +	+promotes to Elephant +
+ +	+Pawn +	+P +	+ +	+fW +	+promotes to Gold +
+Promoted pieces (not initially present) +
+ +	+Eagle +	++D +	+ +	+RbBf(FA(cF-F)(mcF-bF)) +	+Moves as Q, except for linear double-step 'stinging' moves diagonally forward +
+ +	+Unicorn +	++H +	+ +	+BsbRf(WD(cW-W)(mcW-bW)) +	+(aka Horned Falcon) Moves as Q, except for linear double-step 'stinging' forward +
+ +	+Narrow Queen +	++V +	+ +	+BvR +	+aka Flying Ox +
+ +	+Sleeping Queen +	++M +	+ +	+BsR +	+aka Free Boar +
+ +	+Flying Stag +	++T +	+ +	+FvRsW +	+ +
+ +	+White Horse +	++L +	+ +	+vRfB +	+ +
+ +	+Whale +	++A +	+ +	+fbRbB +	+ +

+ +

Pawn peculiarities

Pawns move and capture straight ahead.

General rules

The game is won by capturing the opponent's only King.
Pieces promote at the end of a move into the promotion zone.
The promotion zone consists of the last four ranks.
Pieces promote only once.
Perpetual checking is forbidden, and would be ruled a loss on the 4-fold repeat.
Other repetitions lose for the side that creates them.

Lion moves and Stinging pieces

+Some pieces can make two moves per turn. +That means they can also capture two pieces per turn, +one on the square they move to (as normal), and one 'en passant' on the transit square. +They can also capture on the transit square, and move on to an empty square ('hit and run'), +or capture and move back to where they came from ('shooting' the piece from a distance, as it were). +Of course they can also capture a single piece in the normal Chess manner. +In that case the transit square is immaterial. +

+The Lion can make such double moves as two King steps, +i.e. in all directions, and arbitrarily changing direction between them. +The Unicorn and the Eagle can only make double moves in one or two directions respectively. +They can not arbitrarily change direction, but only reverse it (or not), so they do stay on the ray in that direction. +But that way they can still make double, hit-and-run, shooting or normal captures. +All these pieces can also jump over the transit square, i.e. reach the distant two-step destination in a single jump. +Finally they can also just make a step to an adjacent square, refraining from taking a second step. +

Restrictions on Lion capture

+There are rules to make Lion trading very difficult, in order to keep the Lions in play. +Basically they specify that two Lions cannot be captured in consecutive half-moves. +When the first capture is Lion x Lion from a distance, it is forbidden to play it if recapture of the capturing Lion is possible. +When another piece captures a Lion, it is just the other way around: +then the 'counterstrike' by a non-Lion against the Lion is forbidden. +One possibility left open is thus when you capture an adjacent Lion. +But then you would in general be foolish to allow recapture, +as you could take the Lion hit-and-run fashion, fleeing to a save square. +An exception to the rule is when a valuable opponent piece (i.e. not a Pawn or Go Between) forms a 'bridge' between the Lions; +you may then capture that piece in the first leg of the double-move, +and then take the opponent Lion with the second leg. +Then the opponent can recapture, but he will have lost a valuable piece. +

XBoard interface issues

+This game has to be played with the option Show Target Squares on! +This option will cause marking of the target squares of any piece you select or grab, +by the engine (with legality testing off) or by XBoard (legality testing on). +Moving to a square marked in cyan will be interpreted not as the final destination, +but as the transit square after the first step of a multi-leg move. +XBoard will then highlight the possible destination squares of the second leg from there. +Should you want to end on the cyan square, you click it again, (it will be no longer marked in cyan), +and XBoard will terminate the move after the first leg. +You can also move back to the starting square, to 'shoot' the opponent piece from nearby. +

+With Detour Underpromotion on, XBoard will assume by default that every piece that enters the zone promotes. +Should you want to defer in this mode, you should use a click-click move, +and when you make the click on the promotion square, +move the mouse down before releasing the button. +If you move enough the piece on the promotion square will change back to the unpromoted form, +and then you can release. +With Detour Underpromotion off, you will automatically get a promotion popup that asks whether you want to promote or defer. +

Differences with FIDE

+Except that there are also Kings, Queens, Rooks and Bishops, not much is the same. +

Strategy issues

+Piece with no sliding forward moves are hard to promote, +but promotion of forward sliders is practically unavoidable. +

+You can have two Kings by promoting the Elephant, in which case the opponent would have to capture both in order to win. +

+ + diff --git a/whats_new/rules/Chu.png b/whats_new/rules/Chu.png new file mode 100644 index 0000000..036a962 Binary files /dev/null and b/whats_new/rules/Chu.png differ diff --git a/whats_new/rules/ChuChess.html b/whats_new/rules/ChuChess.html new file mode 100644 index 0000000..8765ba5 --- /dev/null +++ b/whats_new/rules/ChuChess.html @@ -0,0 +1,515 @@ + +

+Chu Chess + + +

+ +

Chu Chess

+Chu Chess is an intermediate between (Mighty-Lion) Chess and Chu Shogi. +It was designed for over-the-board play with the aid of two Chess sets, some draughts chips, +and an International-Daughts (10x10) board. +Pieces placed on a draughts-chip pedestal would represent 'crowned' pieces, +i.e. pieces that in addition to their normal Chess moves would also be able to move as an orthodox King. +With the exception of the Knight on a pedestal, which would not only get the extra King move, +but the full power of a Chu-Shogi Lion. +(To highlight its importance, it could be put on top of a stack of draughts chips.) +This variant can be played in two versions, differing only in promotion rules, +which can be either Chess-like or Shogi-like. +

+ +	+ Initial setup + +f0, e9: King + +e1, f8: Lion + +f1, e8: Queen + +g1, d8: Crowned Rook + +d1, g8: Crowned Bishop + +a0, a9, j0, j9: Rook + +c1, c8, h1, h8: Bishop + +b1, b8, i1, i8: Knight + +a1, a8, j1, j8: Commoner + +a2-j2, a7-j7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Captured while passing through the square to another destination +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 3 steps towards it +
+Lion +	+L +	+15 +	+KNAD(cK-aK)(K-bK) +	+Can make two independent King steps per turn (capturing upto two pieces) +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Crowned Rook +	++R +	+7 +	+RF +	+aka Dragon Kin +
+Crowned Bishop +	++B +	+5.25 +	+BW +	+aka Dragon Horse +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.5 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Commoner +	+M +	+3 +	+K +	+aka Man or Soldier +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching promotion zone +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote asthey promote in orthodox Chess piece of choice when they enter the promotion zone (in the Chess-like version).

Castling

+A King that has not moved before can move three squares in the direction of a Rook that has not moved before, +in which case that Rook is moved to the square the King skipped over. +This is only allowed if all squares between King and Rook are empty, +when the King is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.
The promotion zone is three ranks deep.
You cannot promote to Lion if you already have one.

Chess-like or Shogi-like promotion

+In the Chess-like version only Pawns promote. +You can choose what piece to promote to, but promotion is mandatory: +you cannot stay a Pawn. +In the Shogi-like version other pieces can also promote, but there is no choice: +pieces promote to their 'crowned' versions, and acquire the moves of a King on top of their own that way. +Pieces that already had all King moves cannot promote. +Thus a Commoner cannot Promote, and a Pawn can only promote to Commoner. +The Knight promotes to Lion, and thus gains unusually much in value. +

The Lion piece

+The Lion can make two moves per turn. +That means it can also capture two pieces per turn, +one on the square it moves to (as normal), and one 'en passant' on the transit square. +It can also capture on the transit square, and move on to an empty square ('hit and run'), +or capture and move back to where it came from ('shooting' the piece from a distance, as it were). +Of course it can also capture a single piece in the normal Chess manner. +In that case the transit square is immaterial. +

+The Lion can make such double moves as two King steps, +i.e. in all directions, and arbitrarily changing direction between them. +It can also jump over the transit square, i.e. reach the distant two-step destination in a single jump. +Finally it can also just make a step to an adjacent square, refraining from taking a second step. +

Restrictions on Lion capture

+When a non-Lion captures a Lion, it is just the other way around: +then the 'counterstrike' by a non-Lion against the Lion is forbidden. +One possibility left open is thus when you capture an adjacent Lion. +But then you would in general be foolish to allow recapture, +as you could take the Lion hit-and-run fashion, fleeing to a save square. +An exception to the rule is when a valuable opponent piece (i.e. not a Pawn) forms a 'bridge' between the Lions; +you may then capture that piece in the first leg of the double-move, +and then take the opponent Lion with the second leg. +Then the opponent can recapture, but he will have lost a valuable piece. +In the late end-game, when you have nothing to protect your Lion with other than King, +trading becomes possible. +

XBoard interface issues

+XBoard will allow both the Chess-like and the Shogi-like promotion; +the engine will have to decide which promotion style it thinks legal. +The default choice in 'sweep-promotions' mode will be deferral for pieces, however, +to facilitate Chess-like play. +To play a Shogi promotion in this mode you should enter it as a click-click move, +but during the click on the promotion square move the mouse pointer down until the promoted piece appears, and only then release the mouse button. +The Pawn will show Queen as default, and a 'dragging click' on the promotion square will cycle through all choices. +In the Shogi version you would have to choose the Commoner that way. +With a promotion popup you would have to press 'No' on piece moves into the zone when you play the Chess-like version, +and press 'Commoner' on Pawn promotions when you play the Shogi-like version. +

Differences with FIDE

+The board is 10x10, with a 3-rank-deep promotion zone. +The initial setup leaves an almost empty rank behind the pieces, where you can immediately castle. +You have a Lion, Crowned Rook, Crowned Bishop and two Soldiers as extra pieces. +In the Shogi-like version of the rules, some pieces other than Pawn can also promote. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +

+With a single Commoner you can force checkmate on a bare King. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+A Queen is upward compatible with all weaker pieces except Knight. +So only promotion to Queen or Knight makes sense, +(except perhaps for rare situations where you might have to avoid stalemate). +

+ + diff --git a/whats_new/rules/ChuChess.png b/whats_new/rules/ChuChess.png new file mode 100644 index 0000000..36bd707 Binary files /dev/null and b/whats_new/rules/ChuChess.png differ diff --git a/whats_new/rules/ClobNut.png b/whats_new/rules/ClobNut.png new file mode 100644 index 0000000..67d7f49 Binary files /dev/null and b/whats_new/rules/ClobNut.png differ diff --git a/whats_new/rules/Courier.html b/whats_new/rules/Courier.html new file mode 100644 index 0000000..e3f7376 --- /dev/null +++ b/whats_new/rules/Courier.html @@ -0,0 +1,401 @@ + +

+Courier Chess + + +

+ +

Courier Chess (a medieval precursor of modern Chess)

+ +	+ Initial setup + +f1, f8: King + +a1, a8, l1, l8: Rook + +d1, d8, i1, i8: Courier (Bishop) + +b1, b8, k1, k8: Knight + +e1, e8: Commonner + +g1, g8: Ferz (General) + +h1, h8: Wazir (Grand Visor) + +c1, c8, j1, j8: Alfil (Elephant) + +a2-l2, a7-l7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+No castling of any kind +
+Rook +	+R +	+8 +	+R +	+ +
+Courier +	+B +	+5 +	+B +	+Color bound +
+Elephant +	+E +	+1 +	+A +	+Bound to 8 squares! +
+Knight +	+N +	+4 +	+N +	+ +
+Commoner +	+M +	+4 +	+K +	+ +
+Ferz +	+F +	+2 +	+F +	+Color bound +
+Wazir +	+W +	+1.5 +	+W +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Ferz on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
There is no initial double-push, and thus no en-passant capture.
Pawns promote to Ferz when they reach last rank; there is no choice.

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) also counts as a loss.

Differences with FIDE

+The Commoner (Man) replaces the Queen. +The Ferz and Alfil (Elephant) from Shatranj are added, and the board width expanded to accomodate them. +The Pawns have no double move. +There is no castling. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight, Ferz or Wazir (in addition to your own King). +Two Knights, Ferzes or two Wazirs also cannot do this, and F + W only in rare situations. +The Commoner can force checkmate against a bare King. +

+Alfils are not only color bound, but also skip over half the files and ranks. +So they can only reach 8 squares, making them next to worthless. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/Courier.png b/whats_new/rules/Courier.png new file mode 100644 index 0000000..f08529d Binary files /dev/null and b/whats_new/rules/Courier.png differ diff --git a/whats_new/rules/Crazy.html b/whats_new/rules/Crazy.html new file mode 100644 index 0000000..3594958 --- /dev/null +++ b/whats_new/rules/Crazy.html @@ -0,0 +1,380 @@ + +

+Crazyhouse + + + +

Crazyhouse

+ +	+ Initial setup + +e1, e8: King + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Pieces captured change color, and are kept in hand by the side who captured them. +In stead of a normal move, such pieces can be dropped at any later time.
+
Pawns can not be dropped on first or last rank.
+
Pieces obtained by promotion revert to Pawns on capture.
+

XBoard interface issues

+Pieces obtained by promotions are indicated by slightly modified versions of the conventional piece symbols. +(E.g. the Rook has a pointy roof, the Knight a blind-fold, etc.) +If you don't want that, start XBoard with the option -disguisePromoted true. +You can drop pieces by dragging them onto the board from the holdings displayed beside the board. +

Differences with FIDE

+Captured pieces can later be dropped to augment the army of their capturer. +

Strategy issues

+Because pieces are dropped back, there will not be a traditional end-game. +Trading material does not constitute progress towards winning, even when you are ahead. +

+Because pieces obtained through promotion revert to Pawns on capture, +they are really different piece types from the primordial pieces that move the same. +They are in fact more valuable: it is much better to lose a Queen that gives the opponent a Pawn in hand, +than to lose a Queen that gives him a Queen in hand. +

+ + diff --git a/whats_new/rules/Crazy.png b/whats_new/rules/Crazy.png new file mode 100644 index 0000000..3465290 Binary files /dev/null and b/whats_new/rules/Crazy.png differ diff --git a/whats_new/rules/Cylinder.html b/whats_new/rules/Cylinder.html new file mode 100644 index 0000000..c8dc03c --- /dev/null +++ b/whats_new/rules/Cylinder.html @@ -0,0 +1,378 @@ + +

+Cylinder Chess + + +

+ +

Cylinder Chess

+ +	+ Initial setup + +e1, e8: King + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+oK +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+11 +	+oRoB or oQ +	+ +
+Rook +	+R +	+5 +	+oR +	+ +
+Bishop +	+B +	+4 +	+oB +	+Color-bound +
+Knight +	+N +	+3.25 +	+oN +	+ +
+Pawn +	+P +	+1 +	+mfWcfoF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

General rules

The board wraps around like a cylinder, the h-file connecting to the a-file.
It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

XBoard interface issues

+Cylinder Chess must be played with legality testing off, as XBoard does not understand the wrapping of the board. +

Differences with FIDE

+The board wraps around as a cylinder. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Rook,Bishop or Knight (in addition to your own King). +Two Knights and Bishops in any combination cannot do that either. +(Because the board has no corners, forcing checkmate has become much more difficult.) +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+The Rook and Knight hardly benefit from the cylinder board. +The Bishop, whose moves normally often end on the left or right board edge, does benefit some, +and a Queen gets very dangerous. +

+ + diff --git a/whats_new/rules/FIDE.png b/whats_new/rules/FIDE.png new file mode 100644 index 0000000..a9b9398 Binary files /dev/null and b/whats_new/rules/FIDE.png differ diff --git a/whats_new/rules/FRC.html b/whats_new/rules/FRC.html new file mode 100644 index 0000000..28f1aaa --- /dev/null +++ b/whats_new/rules/FRC.html @@ -0,0 +1,153 @@ + +

+FRC +

+ +

Fischer Random Chess (Chess960)

Initial setup

+There is no fixed setup; +the back-rank pieces are randomly shuffled with certain restrictions. +Black's setup is the mirror image of white's, though. +Both sides have: +

+1 King +
+1 Queen +
+2 Rooks +
+2 Bishops +
+2 Knights +
+a2-j2, a7-j7: Pawns +

+The Bishops must start on different colors. +The King must start between the Rooks. +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 3 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.5 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

+A King that has not moved before can move to the c1/c8 or g1/g8 in the direction of a Rook that has not moved before, +in which case that Rook is moved to the square on the other side next to the King. +This is only allowed if all squares traveled through by King and Rook are empty (after their removal), +when the King is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

XBoard interface issues

+You can use the New Shuffle dialog to control the randomization of the initial position. +

Differences with FIDE

+The start position is not fixed, but randomly picked. +Castling is generalized to allow it with non-standard placement of King and Rooks. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/FRC.png b/whats_new/rules/FRC.png new file mode 100644 index 0000000..bad3b24 Binary files /dev/null and b/whats_new/rules/FRC.png differ diff --git a/whats_new/rules/Falcon.html b/whats_new/rules/Falcon.html new file mode 100644 index 0000000..462fe95 --- /dev/null +++ b/whats_new/rules/Falcon.html @@ -0,0 +1,161 @@ + +

+Falcon Chess +

+ +

Falcon Chess

+ +	+ Initial setup + +f1, f8: King + +e1, e8: Queen + +d1, d8, g1, g8: Falcon + +a1, a8, j1, j8: Rook + +b1, b8, i1, i8: Bishop + +c1, c8, h1, h8: Knight + +a2-j2, a7-j7: Pawns + +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 3 or 4 steps to b- or i-file +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Falcon +	+F +	+~5 +	+nLnJ +	+Can reach its 16 destination through 3 paths each +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.5 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, F, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

+A King that has not moved before can move three steps in the direction of a Rook that has not moved before, +in which case that Rook is moved to the square next to the King on the other side. +This is only allowed if all squares between King and Rook are empty, +when the King is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +

The Falcon piece

+The Falcon is a so-called multi-path piece. +It complements the moves of all orthodox pieces, in the sense that it can reaches all squares reachable by King could reach in 3 moves +that cannot be reached by R, B or N in a single move. +A King would always need three steps to reach the Falcon destinations, +(one diagonal and two straight, or two diagonal and one straight), +but it can always do so in three ways, depending on the order of the straight and diagonal steps. +The Falcon must follow the path a King could have followed, +and if all the three paths are blocked, the Falcon cannot move to that destination. +

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+The Falcon pieces are extra, and the board is expanded to accomodate them. +To handle the larger board width, the King moves 3 squares on castling. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). King + Falcon can force mate on a bare King. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/Falcon.png b/whats_new/rules/Falcon.png new file mode 100644 index 0000000..d9764a9 Binary files /dev/null and b/whats_new/rules/Falcon.png differ diff --git a/whats_new/rules/Giveaway.html b/whats_new/rules/Giveaway.html new file mode 100644 index 0000000..0a7ea9b --- /dev/null +++ b/whats_new/rules/Giveaway.html @@ -0,0 +1,366 @@ + +

+Give-away Chess + + +

+ +

Give-away Chess

+ +	+ Initial setup + +e1, e8: King + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+WF +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+6 +	+RB or Q +	+ +
+Rook +	+R +	+4 +	+R +	+ +
+Bishop +	+B +	+3 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to K, Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another piece of choice (including King) when they reach last rank.

Castling

General rules

Capture is mandatory; if ay capture is possible, you cannot play a non-capture.
The game is won by the side that has no pieces left.
In other case of stalemate (no legal moves) the side with the smallest number of pieces wins.
Stalemate with an equal number of pieces is a draw.

Differences with FIDE

+Capture is mandatory. +The King is not special in any way, and can be captured like any other piece. +Hence the concept of 'check' does not exist. +Pawns can promote to King. +

Strategy issues

+The King is actually a good choice for a promotion piece, as it is not so easy for the opponent to feed a lot of material to a King. +

+ + diff --git a/whats_new/rules/Gothic.html b/whats_new/rules/Gothic.html new file mode 100644 index 0000000..d1e3d63 --- /dev/null +++ b/whats_new/rules/Gothic.html @@ -0,0 +1,403 @@ + +

+Gothic Chess + + +

+ +

Gothic Chess

+ +	+ Initial setup + +f1, f8: King + +d1, d8: Queen + +e1, e8: Chancellor + +g1, g8: Archbishop + +a1, a8, j1, j8: Rook + +c1, c8, h1, h8: Bishop + +b1, b8, i1, i8: Knight + +a2-j2, a7-j7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 3 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Chancellor +	+C +	+9 +	+RN +	+ +
+ArchBishop +	+A +	+8.75 +	+BN +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.5 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+The Chancellor and Archbishop pieces are extra, and the board is expanded to accomodate them. +To handle the larger board width, the King moves 3 squares on castling. +

Strategy issues

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+As Chancellor and Archbishop are nearly equal in value to Queen, under-promotion is very common, +and there is virtually never any need to promote to R, B or N. +

+ + diff --git a/whats_new/rules/Gothic.png b/whats_new/rules/Gothic.png new file mode 100644 index 0000000..f982b86 Binary files /dev/null and b/whats_new/rules/Gothic.png differ diff --git a/whats_new/rules/Grand.html b/whats_new/rules/Grand.html new file mode 100644 index 0000000..bb31849 --- /dev/null +++ b/whats_new/rules/Grand.html @@ -0,0 +1,404 @@ + +

+Grand Chess + + +

+ +

Grand Chess

Captured pieces will be displayed beside the board for promotion choice

Initial setup

+e1, e8: King +
+d1, d8: Queen +
+f1, f8: Chancellor +
+g1, g8: Archbishop +
+a0, a9, j0, j9: Rook +
+c1, c8, h1, h8: Bishop +
+b1, b8, i1, i8: Knight +
+a2-j2, a7-j7: Pawns +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+ +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Chancellor +	+C +	+9 +	+RN +	+ +
+ArchBishop +	+A +	+8.75 +	+BN +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.5 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to any other piece that was captured +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to a piece chosen from the set of captured pieces when moving in or into the promotion zone.
The Promotion zone consists of the last three ranks.
When arriving on last rank, promotion is mandatory. On other ranks it is optional. +
If no promotion piece is available for a mandatory promotion, the Pawn cannot be advanced.

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

XBoard interface issues

+When a Pawn can be promoted, XBoard first advances it as a Pawn to the promotion square. +Then it waits for you to complete the move entry by clicking on the piece in the holdings beside the board that you want to promote to. +To defer promotion you can click on a Pawn or on an empty square in the holdings of the promoting side. +

Differences with FIDE

+The Chancellor and Archbishop pieces are extra, and the board is expanded to accomodate them. +There is no castling. +Promotion only allows you to regain back a piece that you lost before. +The promotion zone is 3 ranks deep, and promotion is only mandatory on last rank. +

Strategy issues

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+As Chancellor and Archbishop are nearly equal in value to Queen, under-promotion is very common. +

+The super-pieces (Q, C, A) devaluate by the presence of lower-valued opponent pieces. +As a result trading Q for R + B is in not as bad when you still have A and C, +as the latter gain in value by eliminating the opponent's R and B, +which is more compensation than the intrinsic value difference between Q and R + B. +

+ + diff --git a/whats_new/rules/Grand.png b/whats_new/rules/Grand.png new file mode 100644 index 0000000..a4ca873 Binary files /dev/null and b/whats_new/rules/Grand.png differ diff --git a/whats_new/rules/Great.html b/whats_new/rules/Great.html new file mode 100644 index 0000000..b50f9c0 --- /dev/null +++ b/whats_new/rules/Great.html @@ -0,0 +1,413 @@ + +

+Great Shatranj + + +

+ +

Great Shatranj

Captured pieces will be displayed beside the board for promotion choice

Initial setup

+e1, e8: King +
+f1, f8: Minister +
+d1, d8: Great General +
+g1, g8: High Priestess +
+a1, a8, j1, j8: Dababba +
+c1, c8, h1, h8: Elephant +
+b1, b8, i1, i8: Knight +
+a1, a8, j1, j8: War Machine +
+a2-j2, a7-j7: Pawns +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Direct leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Cannot castle +
+General +	+G +	+6.5 +	+WDFA +	+ +
+Minister +	+M +	+6.5 +	+WDN +	+ +
+High Priestess +	+H +	+6.5 +	+FAN +	+ +
+Elephant +	+E +	+3 +	+FA +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Woody +	+W +	+3 +	+WD +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to any other piece that was captured, or to Soldier +
+Only available through promotion +
+Soldier +	+S +	+3 +	+WF or K +	+ +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
There is no initial double-push, and thus no en-passant capture.
Pawns promote to a piece chosen from the set of captured pieces, or to Soldier when they reach last rank. +The chosen piece is then removed from this set.

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.
If your opponent only has a King at the beginning of your turn, and your king is not yet bare, you win. +This means that after you capture the last piece, the opponent gets one equalizing turn to recapture yours, +in which case it would be a draw.

XBoard interface issues

+When a Pawn can be promoted, XBoard first advances it as a Pawn to the promotion square. +Then it waits for you to complete the move entry by clicking on the piece in the holdings beside the board that you want to promote to. +Initially there are a number of Soldiers available in the holdings, +for when you should promote before any of your pieces is captured. +

Differences with FIDE

+There are no sliders such as Rook, Bishop or Queen in this game: +their distant moves have all been replaced by a single two-square jumping move. +In addition it is more related to Capablanca Chess than to FIDE, +featuring compounds of Knight and the pieces substituting for Rook and Bishop, +and the wider board to accomodate them. +There is no double-push on the Pawns (and thus no e.p. capture), +and promotion only allows you to regain back a piece that you lost before, +or one of the stocked Soldier pieces that do not occur in the initial setup. +

Strategy issues

+Elephants are confined to squares of a single color. +Having Elephants on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+As the three strongest pieces (General, Minister and High Priestess) are nearly equal in value, under-promotion is very common. +

+ + diff --git a/whats_new/rules/Great.png b/whats_new/rules/Great.png new file mode 100644 index 0000000..0f99cce Binary files /dev/null and b/whats_new/rules/Great.png differ diff --git a/whats_new/rules/Janus.html b/whats_new/rules/Janus.html new file mode 100644 index 0000000..b23131e --- /dev/null +++ b/whats_new/rules/Janus.html @@ -0,0 +1,390 @@ + +

+Janus Chess + + +

+ +

Janus Chess

+ +	+ Initial setup + +e1, e8: King + +f1, f8: Queen + +b1, b8, i1, i8: Janus + +a1, a8, j1, j8: Rook + +d1, d8, g1, g8: Bishop + +c1, c8, h1, h8: Knight + +a2-j2, a7-j7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 3 or 4 steps to b- or i-file +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Janus +	+J +	+8.75 +	+BN +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.5 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, J, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

+A King that has not moved before can move to the square neighboring a Rook that has not moved before, +in which case that Rook is moved to the square next to the King on the other side. +This is only allowed if all squares between King and Rook are empty, +when the King is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+The Janus pieces are extra, and the board is expanded to accomodate them. +The King starts on the other side of the Queen. +Castling is asymmetric; the King moves 4 steps on long castling, 3 steps on short. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +The Janus can force checkmate against a bare King. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+As Janus is nearly equal in value to Queen, under-promotion to it is common, +and there is virtually never any need to promote to R, B or N. +

+The super-pieces (Q, J) devaluate by the presence of lower-valued opponent pieces. +As a result trading Q for R + B is in general a good trade when you still have both J, +as the latter gain in value by eliminating the opponent's R and B, +which is more compensation than the intrinsic value differene between Q and R + B. +

+ + diff --git a/whats_new/rules/Janus.png b/whats_new/rules/Janus.png new file mode 100644 index 0000000..1f832d7 Binary files /dev/null and b/whats_new/rules/Janus.png differ diff --git a/whats_new/rules/Knightmate.html b/whats_new/rules/Knightmate.html new file mode 100644 index 0000000..18428c2 --- /dev/null +++ b/whats_new/rules/Knightmate.html @@ -0,0 +1,370 @@ + +

+Knightmate + + +

+ +

Knightmate

+ +	+ Initial setup + +e1, e8: Royal Knight + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +b1, b8, g1, g8: Commoners + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+Royal Knight +	+K +	+- +	+N +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+10 +	+RB or Q +	+ +
+Rook +	+R +	+4.5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Commoner +	+M +	+3 +	+K +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or M on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

+A Royal Knight that has not moved before can move two squares in the direction of a Rook that has not moved before, +in which case that Rook is moved to the square on the other side next to the Royal Knight. +This is only allowed if all squares traveled through by Royal Knight and Rook are empty (after their removal), +when the Royal Knight is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +

General rules

It is not allowed to expose your Royal Knight to check.
The game is won by checkmating the opponent's Royal Knight.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+The King moves as a Knight, the Knights move as a King. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Rook, Bishop or Commoner (in addition to your own King). +All pairs of pieces can force checkmate on a bare King, however. +A Queen can even do it without help of its Royal Knight, and is thus extremely dangerous. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/Knightmate.png b/whats_new/rules/Knightmate.png new file mode 100644 index 0000000..148fa2f Binary files /dev/null and b/whats_new/rules/Knightmate.png differ diff --git a/whats_new/rules/Lion.html b/whats_new/rules/Lion.html new file mode 100644 index 0000000..b8df8c5 --- /dev/null +++ b/whats_new/rules/Lion.html @@ -0,0 +1,435 @@ + +

+Mighty Lion Chess + + +

+ +

Mighty Lion Chess

+ +	+ Initial setup + +e1, e8: King + +b1, b8: Lion + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Captured while passing through the square to another destination +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Lion +	+L +	+15 +	+KADN(cK-aK)(K-bK) +	+Can make two independent King steps per turn (capturing upto two pieces) +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

The Lion piece

Restrictions on Lion capture

XBoard interface issues

Differences with FIDE

+One Knight is replaced by a Lion piece with very special properties. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/Lion.png b/whats_new/rules/Lion.png new file mode 100644 index 0000000..e36e4d4 Binary files /dev/null and b/whats_new/rules/Lion.png differ diff --git a/whats_new/rules/Losers.html b/whats_new/rules/Losers.html new file mode 100644 index 0000000..3fa979e --- /dev/null +++ b/whats_new/rules/Losers.html @@ -0,0 +1,372 @@ + +

+Losers Chess + + +

+ +

Losers Chess

+ +	+ Initial setup + +e1, e8: King + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

General rules

Capture is mandatory; if ay capture is possible, you cannot play a non-capture.
It is not allowed to expose your King to check.
The game is won by being checkmated or being left with a bare King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+Capture is mandatory. +You win by being checkmated in stead of checkmating, or by having a bare King. +

Strategy issues

+Initially having more and stronger pieces makes you more likely to win. +

+When the opponent has only King and Pawns left, blocking one of his Pawns (e.g. with Knight or Bishop), +and then carefully refraining from attacking it while using your powerful pieces to shephard his King +towards your own Pawns, and then finally sacrificing your mobile material to it, +is a good way to win. +

+ + diff --git a/whats_new/rules/Makruk.html b/whats_new/rules/Makruk.html new file mode 100644 index 0000000..42b2cc5 --- /dev/null +++ b/whats_new/rules/Makruk.html @@ -0,0 +1,358 @@ + +

+Makruk + + +

+ +

Makruk (Thai Chess)

+ +	+ Initial setup + +d1, e8: King + +e1, d8: Met + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Elephant + +b1, b8, g1, g8: Knight + +a3-h3, a6-h6: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+With Cambodian rules its first move can also be a non-capture Knight jump (mfhN) +
+Met +	+M +	+1.5 +	+F +	+With Cambodian rules its first move can also be two steps forward (fD) +
+Rook +	+R +	+5 +	+R +	+ +
+Elephant +	+S +	+2.5 +	+FfW +	+ +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to M on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
There is no initial double-push, and thus no en-passant capture.
Pawns promote to Met when they reach the 6th rank; there is no choice.

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+The Queen and Bishops are replaced by Ferz and Elephant. +Pawns start on the third rank. +Promotion happens on 6th rank. +Promotion always to Met. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Met, Elephant or Knight (in addition to your own King). +Two Knights or two Mets cannot do it either. +

+ + diff --git a/whats_new/rules/Makruk.png b/whats_new/rules/Makruk.png new file mode 100644 index 0000000..af58e5a Binary files /dev/null and b/whats_new/rules/Makruk.png differ diff --git a/whats_new/rules/Mini.html b/whats_new/rules/Mini.html new file mode 100644 index 0000000..0e4c766 --- /dev/null +++ b/whats_new/rules/Mini.html @@ -0,0 +1,414 @@ + +

+mini-Shogi + + +

+ +

mini-Shogi (Diamond Quest)

+ +	+ Initial setup + +a1, e5: King + +e1, a5: Rook + +d1, hb5: Bishop + +b1, d5: Gold General + +c1, c5: Silver General + +a2, e4: Pawn + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+WF +	+ +
+Rook +	+R +	+5 +	+WW +	+Promotes tp Dragon +
+Bishop +	+B +	+4 +	+FF +	+Promotes to Horse +
+Gold +	+G +	+4 +	+WfF +	+ +
+Silver +	+S +	+3.5 +	+FfW +	+promotes to Gold +
+Pawn +	+P +	+1 +	+fW +	+promotes to Gold +
+Promoted pieces (not initially present) +
+Dragon +	+D or +R +	+6 +	+RF +	+ +
+Horse +	+H or +B +	+5 +	+BW +	+ +

Pawn peculiarities

Pawns move and capture straight ahead.
It is forbidded to have more than one Pawn in the same file.
It is forbidden to checkmate the opponent with a Pawn drop.
+

General rules

The game is won by capturing the opponent's King.
Pieces captured change color, and are kept in hand by the side who captured them. +In stead of a normal move, such pieces can be dropped at any later time.
Pieces cannot be moved or dropped to a location where all their moves would go off board.
Pieces optionally promote at the end of a move into, in or out of the promotion zone.
The promotion zone consists of the last rank.
Pieces obtained by promotion revert to their original form on capture.
Perpetual checking is forbidden, and would be ruled a loss on the 4-fold repeat.
On other 4-fold repetitions white loses.

XBoard interface issues

+Mini-Shogi is (not yet) a standard variant in XBoard. +It has to be played in XBoard by selecting regular Shogi +after having set the board- and holdings-size overrides in the New Variant dialog all to 5 +(i.e. 5x5 board, and holdings for 5 piece types). +This is not all, however; the pieceToCharTable has to be changed to tell XBoard that the Lance and Knight do not participate. +(In regular Shogi they would, but here they would push Silver and Gold out of the holdings!) +This can unfortunately only be done through command-line options. +

+It is therefore best to put all options needed to massage XBoard into playing this variant in a settings file mini.xop. +On install .xop files are associated with XBoard, so clicking them would start XBoard with the options in that file. +You could then set everything in the file needed to start in mini-Shogi mode: +

+-variant shogi
+-boardHeight 5
+-boardWidth 5
+-holdingsSize 5
+-pieceToCharTable "P.BR.S...G.+.++.+Kp.br.s...g.+.++.+k"
+

+Since the game is just a subset of regular Shogi, legality testing can remain on. +You could also specify your favorite mini-Shogi engine with -fcp in that file. +

+You can drop pieces by dragging them onto the board from the holdings displayed beside the board. +

+Of course there will always be people that prefer an oriental look, with pentagonal kanji tiles. +XBoard comes with a set of kanji pieces in the 'themes/shogi' sub-directory of its data directory +(e.g. /usr/local/share/games/xboard). +You can select that as -pieceImageDirectory (-pid for short) from the command line, or from the View -> Board dialog. +You would also have to tick 'Flip black pieces Shogi style' there (or use the option -flipBlack true) +to make sure the pieces won't go upside down when you flip the view. +

Differences with FIDE

+In stead of Queens you have Silver and Gold Generals. +Pawns capture straight ahead. +Captured pieces can later be dropped to augment the army of their capturer. +There is no castling, Pawn double-push or e.p. capture. +

Strategy issues

+Because pieces are dropped back, there will not be a traditional end-game. +Trading material does not constitute progress towards winning, even when you are ahead. +

+Because Gold Generals obtained through promotion revert to their original form on capture, +they are really different piece types from the primordial Golds that move the same. +In notation they are therefore not indicated as 'G', but as the ID of the original piece prefixed with a '+'. +Especially the promoted Pawn (aka Tokin) is more valuable: it is much better to lose a Gold that gives the opponent a Pawn in hand, +than to lose a Gold that gives him a Gold in hand. +

+It is a big advantage to have a General on the central square. +

+Pieces in hand are in general worth more than on the board, as they are much more mobile. +And you can drop them in the promotion for an easy promotion on the next turn. +But pieces in hand cannot capture anything, and don't guard your promotion zone. +

+ + diff --git a/whats_new/rules/Mini.png b/whats_new/rules/Mini.png new file mode 100644 index 0000000..8d8aaeb Binary files /dev/null and b/whats_new/rules/Mini.png differ diff --git a/whats_new/rules/No.html b/whats_new/rules/No.html new file mode 100644 index 0000000..b6aa4fd --- /dev/null +++ b/whats_new/rules/No.html @@ -0,0 +1,377 @@ + +

+No Castle + + +

+ +

No Castle

+This is a shuffle variant of normal Chess, which in general destroys the possibility to castle, +as the King and Rooks are also shuffled. +For uniformity, castling is therefore always forbidden. +

Initial setup

+There is no fixed setup; +the back-rank pieces are randomly shuffled with certain restrictions. +Black's setup is the mirror image of white's, though. +

+Both sides have: +

+1 King +
+1 Queen +
+2 Rooks +
+2 Bishops +
+2 Knights +
+a2-j2, a7-j7: Pawns +

+The Bishops will start on opposite colors. +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+The Back-rank pieces are randomly shuffled on the back rank in the opening setup. +There is no castling. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/No.png b/whats_new/rules/No.png new file mode 100644 index 0000000..a3cbb17 Binary files /dev/null and b/whats_new/rules/No.png differ diff --git a/whats_new/rules/Rookies.png b/whats_new/rules/Rookies.png new file mode 100644 index 0000000..c134701 Binary files /dev/null and b/whats_new/rules/Rookies.png differ diff --git a/whats_new/rules/Seirawan.html b/whats_new/rules/Seirawan.html new file mode 100644 index 0000000..976751c --- /dev/null +++ b/whats_new/rules/Seirawan.html @@ -0,0 +1,427 @@ + +

+Seirawan Chess + + +

+ +

Seirawan Chess (S-Chess)

Pieces available for gating will be displayed beside the board

Initial setup

+e1, e8: King +
+d1, d8: Queen +
+a1, a8, h1, h8: Rook +
+c1, c8, f1, f8: Bishop +
+b1, b8, g1, g8: Knight +
+a2-h2, a7-h7: Pawns +
+In each hand +
+1 Elephant +
+1 Hawk +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 3 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Elephant +	+E +	+9 +	+RN +	+ +
+Hawk +	+H +	+8.75 +	+BN +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.5 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, E, H, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to any other (non-royal) piece of choice when they reach last rank.

Castling

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.
The Elephant or Hawk can be 'gated' into play, by placing them on a square evacuated by a back-rank piece +that moved for the first time, as second part of the same turn.
During gating, your King must not 'pass through check'.
When castling, you can gate onto the King or Rook square, but not on both.

XBoard interface issues

+To perform a gating move, first select the piece to be gated. +(When you have not switched off highlighting or the line gap, this will draw a yellow border around the piece.) +Then move the piece on the back rank. +If you drag the piece, the gated piece will appear from under it. +(With click-click moving you will only see it after the move is already done.) +To gate on the Rook square after castling, you have to enter the castling by dragging the Rook onto the King! +

+To enter a gating move by typing, you have to suffix them with /H or /E. +For gating on the Rook square after castling, you would have to write the castling as RxK. +(Ughh! Good thing that no one in his right mind would want to gate there!) +

Differences with FIDE

+The Elephant and Hawk pieces are extra, and enter the board by gating. +

Strategy issues

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+As Elephant and Hawk are nearly equal in value to Queen, under-promotion is very common. +

+The super-pieces (Q, E, H) devaluate by the presence of lower-valued opponent pieces. +As a result trading Q for R + B is in general a good trade when you still have E and H, +as the latter gain in value by eliminating the opponent's R and B, +which is more compensation than the intrinsic value difference between Q and R + B. +

+Keeping E and H in hand is good if there are still many gating opportunities, +as you can then gate at the location that is most damaging to your opponents position. +When there are not too many positions left, protecting the remaining ones becomes a vulnerability, however, +so you better use them were you still can. +If you still have a piece in hand, and only a single Knight that can gate it (bacause all your other pieces already moved), +even sacrificing a Queen for that Knight would gain your opponent a piece. +

+ + diff --git a/whats_new/rules/Seirawan.png b/whats_new/rules/Seirawan.png new file mode 100644 index 0000000..89f0cfd Binary files /dev/null and b/whats_new/rules/Seirawan.png differ diff --git a/whats_new/rules/Shatranj.html b/whats_new/rules/Shatranj.html new file mode 100644 index 0000000..82d02c8 --- /dev/null +++ b/whats_new/rules/Shatranj.html @@ -0,0 +1,364 @@ + +

+Shatranj + + +

+ +

Shatranj (ancient Arabic/Persian Chess)

+ +	+ Initial setup + +d1, d8: King + +e1, e8: Ferz (General) + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Alfil (Elephant) + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+No castling of any kind +
+Ferz +	+Q +	+2 +	+F +	+ +
+Rook +	+R +	+8 +	+R +	+ +
+Alfil +	+B +	+1 +	+A +	+Bound to 8 squares! +
+Knight +	+N +	+4 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Ferz on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
There is no initial double-push, and thus no en-passant capture.
Pawns promote to Ferz when they reach last rank; there is no choice.

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) also counts as a loss for the stalemated side.
If your opponent only has a King at the beginning of your turn, and your king is not yet bare, you win. +This means that after you capture the last piece, the opponent gets one equalizing turn to recapture yours, +in which case it would be a draw.

Differences with FIDE

+The Ferz and Alfil replace the Queen and Bishop. +The Pawn have no double move. +No castling. +The King starts on the e-file. +

Strategy issues

+Because of the baring rule a win is possible with any material other than a bare King. +

+Alfils are not only color bound, but also skip over half the files and ranks. +So they can only reach 8 squares, making them next to worthless. +

+ + diff --git a/whats_new/rules/Shatranj.png b/whats_new/rules/Shatranj.png new file mode 100644 index 0000000..4e6d32c Binary files /dev/null and b/whats_new/rules/Shatranj.png differ diff --git a/whats_new/rules/Sho.html b/whats_new/rules/Sho.html new file mode 100644 index 0000000..a44efb0 --- /dev/null +++ b/whats_new/rules/Sho.html @@ -0,0 +1,433 @@ + +

+Sho Shogi + + + +

Sho Shogi (precurser of modern Japanese Chess)

+Sho Shogi means 'small Shogi', and was one of the smaller variants of Japanese Chess, +living in the shadow of its far more popular big brother, Chu Shogi ('middle Shogi'). +Until people invented piece drops for the captured pieces. +The small game was much more suitable for playing with piece drops, +and a small adaptation (eliminating the Elephant) made it into the modern game. +While Chu Shogi is in fact utterly unsuitable for playing with drops. +And in the end, the drops won the day! +

+ +	+ Initial setup + +e1, e8: King + +b8, h2: Rook + +b2, h8: Bishop + +e2, e8: Elephant + +d1, d8, f1, f8: Gold General + +c1, c8, g1, g8: Silver General + +b1, b8, h1, h8: (Shogi) Knight + +a1, a8, i1, i8: Lance + +a3-i3, a7-i7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+ +
+Rook +	+R +	+15 +	+R +	+Promotes to Dragon +
+Bishop +	+B +	+13 +	+B +	+Promotes to Horse +
+Elephant +	+E +	+11 +	+FsfW +	+Promotes to a second King +
+Gold +	+G +	+9 +	+WfF +	+ +
+Silver +	+S +	+8 +	+FfW +	+promotes to Gold +
+Knight +	+N +	+6 +	+fN +	+promotes to Gold +
+Lance +	+L +	+5 +	+fN +	+promotes to Gold +
+Pawn +	+P +	+1 +	+fW +	+promotes to Gold +
+Promoted pieces (not initially present) +
+Dragon +	+D or +R +	+18 +	+RF +	+ +
+Horse +	+H or +B +	+15.5 +	+BW +	+ +

Pawn peculiarities

Pawns move and capture straight ahead.
It is forbidded to have more than one Pawn in the same file.
It is forbidden to checkmate the opponent with a Pawn drop.
+

General rules

The game is won by capturing the opponent's only King.
Pieces promote at the end of a move into, in or out of the promotion zone.
The promotion zone consists of the last three ranks.
Perpetual checking is forbidden, and would be ruled a loss on the 4-fold repeat.

XBoard interface issues

+Sho Shogi is not a standard variant in XBoard. +It has to be played in XBoard by selecting regular Shogi +after having set the holdings-size override in the New Variant dialog to 0, to disable piece drops. +This is not all, however; the pieceToCharTable has to be changed to tell XBoard that the Elephant participates. +This can unfortunately only be done through command-line options. +

+It is therefore best to put all options needed to massage XBoard into playing this variant in a settings file sho.xop. +On install .xop files are associated with XBoard, so clicking them would start XBoard with the options in that file. +You could then set everything in the file needed to start in Sho-Shogi mode: +

+-variant shogi
+-holdingsSize 0
+-pieceToCharTable "PNBRLSE..G.+.++.++Kpnbrlse..g.+.++.++k"
+

+Since the game is just a subset of regular Shogi, legality testing can remain on. +You could also specify your favorite Sho-Shogi engine with -fcp in that file. +

Differences with FIDE

+In stead of Queens you have Silver and Gold Generals, and Lances. +The Knight only has the two forward-most moves of a FIDE Knight. +Pawns capture straight ahead. +There is no castling, Pawn double-push or e.p. capture. +Other pieces than Pawns also promote. +The promotion zone is three ranks deep in stead of one. +You have an Elphant that can promote to a second King. +

Strategy issues

+Most pieces are quite slow, or not manoeuvrable at all, and their practical value is very dependent on how far they are from the Kings. +

+ + diff --git a/whats_new/rules/Sho.png b/whats_new/rules/Sho.png new file mode 100644 index 0000000..eda238d Binary files /dev/null and b/whats_new/rules/Sho.png differ diff --git a/whats_new/rules/Shogi.html b/whats_new/rules/Shogi.html new file mode 100644 index 0000000..d2ed972 --- /dev/null +++ b/whats_new/rules/Shogi.html @@ -0,0 +1,425 @@ + +

+Shogi + + + +

Shogi (Japanese Chess)

+Shogi (literally meaning 'Generals Game') is highly popular in Japan, +and is the World's third major Chess variant, after Xiangqi and FIDE. +Draws hardly occur, because there rule that captured pieces can be dropped back on the board +ensures the game can go on until a decision is reached. +Historically, it are these piece drops that have won the game its popularity; +the dropless version, Sho Shogi (= small Shogi) was overwhelmed in popularity by the also dropless Chu Shogi +(= middle Shogi). +

+ +	+ Initial setup + +e1, e8: King + +b8, h2: Rook + +b2, h8: Bishop + +d1, d8, f1, f8: Gold General + +c1, c8, g1, g8: Silver General + +b1, b8, h1, h8: (Shogi) Knight + +a1, a8, i1, i8: Lance + +a3-i3, a7-i7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+ +
+Rook +	+R +	+15 +	+R +	+Promotes to Dragon +
+Bishop +	+B +	+13 +	+B +	+Promotes to Horse +
+Gold +	+G +	+9 +	+WfF +	+ +
+Silver +	+S +	+8 +	+FfW +	+promotes to Gold +
+Knight +	+N +	+6 +	+fN +	+promotes to Gold +
+Lance +	+L +	+5 +	+fN +	+promotes to Gold +
+Pawn +	+P +	+1 +	+fW +	+promotes to Gold +
+Promoted pieces (not initially present) +
+Dragon +	+D or +R +	+18 +	+RF +	+ +
+Horse +	+H or +B +	+15.5 +	+BW +	+ +

Pawn peculiarities

Pawns move and capture straight ahead.
It is forbidded to have more than one Pawn in the same file.
It is forbidden to checkmate the opponent with a Pawn drop.
+

General rules

The game is won by capturing the opponent's King.
Pieces captured change color, and are kept in hand by the side who captured them. +In stead of a normal move, such pieces can be dropped at any later time.
Pieces cannot be moved or dropped to a location where all their moves would go off board.
Pieces promote at the end of a move into, in or out of the promotion zone.
The promotion zone consists of the last three ranks.
Pieces obtained by promotion revert to their original form on capture.
Perpetual checking is forbidden, and would be ruled a loss on the 4-fold repeat.

XBoard interface issues

+You can drop pieces by dragging them onto the board from the holdings displayed beside the board. +

Differences with FIDE

+In stead of Queens you have Silver and Gold Generals, and Lances. +The Knight only has the two forward-most moves of a FIDE Knight. +Pawns capture straight ahead. +Captured pieces can later be dropped to augment the army of their capturer. +There is no castling, Pawn double-push or e.p. capture. +Other pieces than Pawns also promote. +The promotion zone is three ranks deep in stead of one. +

Strategy issues

+Because pieces are dropped back, there will not be a traditional end-game. +Trading material does not constitute progress towards winning, even when you are ahead. +

+Most pieces are quite slow, or not manoeuvrable at all, and their practical value is very dependent on how far they are from the Kings. +

+ + diff --git a/whats_new/rules/Shogi.png b/whats_new/rules/Shogi.png new file mode 100644 index 0000000..9f8c705 Binary files /dev/null and b/whats_new/rules/Shogi.png differ diff --git a/whats_new/rules/Spartan.html b/whats_new/rules/Spartan.html new file mode 100644 index 0000000..7e8a992 --- /dev/null +++ b/whats_new/rules/Spartan.html @@ -0,0 +1,470 @@ + +

+Spartan Chess + + +

+ +

Spartan Chess

+ +	+ Initial setup + Black (Spartans) + +c8, f8: King + +g1: Warlord + +b8: General + +a8, h8: Lieutenant + +d8, e8: Captain + +a7-h7: Hoplites + + White (Persians) + +f1: King + +e1: Queen + +a1, h1: Rook + +c1, f1: Bishop + +b1, g1: Knight + +a2-h2: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King (Persian) +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +
+King (Spartan) +	+K +	+4.5 +	+K +	+Distributed Royalty: check only when all your Kings are in Check +
+Warlord +	+W +	+8.75 +	+BN +	+ +
+General +	+G +	+7 +	+RF +	+ +
+Lieutenant +	+L +	+3.5 +	+FAmsW +	+Color-changing sideway non-capture move +
+Captain +	+C +	+3 +	+WD +	+Has mating potential +
+Hoplite Pawn +	+H +	+1 +	+mfFcfW +	+Promotes to K, W, G, L or C on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (Perians straight move, diagonal capture, Spartans the other way around).
Pawns can move two squares straight ahead from their initial position, in the direction(s) of their non-capture.
The double-push of Persian Pawns can be blocked, but Hoplites can jump.
There is no en-passant capture.
Pawns/Hoplites promote to another piece of their own side when they reach last rank.
Hoplites can promote to King, but only when the Spartans have a single King just before the promotion.
Persian Pawns can not promote to King.

Castling

+The Persian King, if it has not moved before, can move two squares in the direction of a Rook that has not moved before, +in which case that Rook is moved to the square the King skipped over. +This is only allowed if all squares between King and Rook are empty, +when the King is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +

General rules

It is not allowed to expose all your Kings to capture at the same time.
The Spartans can leave one of their Kings under attack, and as a consequence, have it captured.
The game is won by checkmating the opponent's King or King-pair.
Stalemate (no legal moves, but not in check) is a draw.

Duple check

+The rule that the Spartans cannot leave both Kings attacked would not follow from a rule where you lose when all your Kings are captured. +Because under that rule the opponent could at most capture one of the two in the next turn, +and the next turn the other King could move to safety. +So it is an special rule that leaving them both under attack is illegal, (and only then are you considered to be in check). +In consequence that when you cannot get out of that check situation, you are (duple) checkmated. +(It is as if at the begining of every turn you can decide anew which of your Kings is the royal one.) +

Differences with FIDE

+The black army is completely different. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop, Knight or Lieutenant (in addition to your own King). +Two Knights cannot do that either. +

+Although Captains are worth less than orthodox minors B and N, they can force checkmate on a bare King. +As a result the Spartans can often win when they are a minor ahead, if one of their minors is a Captain +(e.g. KLCKB is a win, where KBNKB in FIDE is a draw). +

+A pair of Spartan Kings also can force checkmate against a bare King. +Furthermore, Kings are tough defenders, because they cannot be attacked by the opponent's King. +So if all the attacker's power is in a single piece, the defending King pair has nothing to fear when they protect each other. +This makes even KQKK is a draw (provided the Spartan kings can connect). +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+Because Hoplites can choose their path, they become passers very easily. +This is only of limited value, though, as moving them around an obstructing Persian Pawn usually also gives the latter a free path to promotion. +Hoplites do stay on the same color when they do not capture. +A Bishop on the other color is thus powerless to stop their promotion. +

+ + diff --git a/whats_new/rules/Spartan.png b/whats_new/rules/Spartan.png new file mode 100644 index 0000000..61436e1 Binary files /dev/null and b/whats_new/rules/Spartan.png differ diff --git a/whats_new/rules/Suicide.html b/whats_new/rules/Suicide.html new file mode 100644 index 0000000..688a116 --- /dev/null +++ b/whats_new/rules/Suicide.html @@ -0,0 +1,363 @@ + +

+Suicide Chess + + +

+ +

Suicide Chess

+ +	+ Initial setup + +e1, e8: King + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8, f1, f8: Bishop + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+6 +	+RB or Q +	+ +
+Rook +	+R +	+4 +	+R +	+ +
+Bishop +	+B +	+3 +	+B +	+Color-bound +
+Knight +	+N +	+3 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to K, Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another piece of choice (including King) when they reach last rank.

Castling

General rules

Capture is mandatory; if ay capture is possible, you cannot play a non-capture.
The game is won by the side that has no legal moves (usually because he has no pieces left).

Differences with FIDE

+The King is not special in any way, and can be captured like any other piece. +Hence the concept of 'check' does not exist. +Pawns can promote to King. +

Strategy issues

+The King is actually a good choice for a promotion piece, as it is not so easy for the opponent to feed a lot of material to a King. +

+ + diff --git a/whats_new/rules/Super.html b/whats_new/rules/Super.html new file mode 100644 index 0000000..cb3b6bb --- /dev/null +++ b/whats_new/rules/Super.html @@ -0,0 +1,430 @@ + +

+Superchess + + +

+ +

Superchess

Captured and substituted pieces will be displayed beside the board for promotion choice

Initial setup

The setup is not fixed, but created by randomly picking substitutes for four pieces of the FIDE array from a predetermined set. +This substitution starts from the FIDE array:

+e1, e8: King +
+d1, d8: Queen +
+a1, a8, h1, h8: Rook +
+c1, c8, f1, f8: Bishop +
+b1, b8, g1, g8: Knight +
+a2-h2, a7-h7: Pawns +

Substitutes set I (Dutch Open Championship)

+1 Amazon +
+1 Empress +
+1 Princess +
+1 Veteran +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to any other piece that was captured or substituted +
+Amazon +	+A +	+12.25 +	+QN +	+ +
+Empress +	+E +	+9 +	+RN +	+ +
+Princess +	+S +	+8.75 +	+BN +	+ +
+Veteran +	+V +	+7.5 +	+KN +	+ +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to a piece chosen from the set of captured or substituted pieces when they reach last rank. +The chosen piece is then removed from this set.

Castling

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

XBoard interface issues

+When a Pawn can be promoted, XBoard first advances it as a Pawn to the promotion square. +Then it waits for you to complete the move entry by clicking on the piece in the holdings beside the board that you want to promote to. +You can use the New Shuffle dialog to control the randomization of the initial position. +

Differences with FIDE

+The start position contains four unorthodox pieces. +Promotion only to pieces that were captured before (or substituted). +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/Super.png b/whats_new/rules/Super.png new file mode 100644 index 0000000..21d0477 Binary files /dev/null and b/whats_new/rules/Super.png differ diff --git a/whats_new/rules/TwoKings.html b/whats_new/rules/TwoKings.html new file mode 100644 index 0000000..783e081 --- /dev/null +++ b/whats_new/rules/TwoKings.html @@ -0,0 +1,374 @@ + +

+Two Kings + + +

+ +

Two Kings

+ +	+ Initial setup + +e1, e8, f1, f8: King + +d1, d8: Queen + +a1, a8, h1, h8: Rook + +c1, c8: Bishop + +b1, b8, g1, g8: Knight + +a2-h2, a7-h7: Pawns + +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

+An e-file King that has not moved before can move two squares in the direction of a Rook that has not moved before, +in which case that Rook is moved to the square the King skipped over. +This is only allowed if all squares between King and Rook are empty, +when the King is not in check on the square it came from, +and would not be in check on any of the squares it skipped over. +

General rules

The King closest to square a1 is the royal one (horizontal measure prevailing over vertical).
It is not allowed to expose your royal King to capture ('check').
The game is won by checkmating the opponent (i.e. being in check, and not being able to get out of it).
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+You have a pair of Kings, and only a single Bishop. +Only one of the Kings is royal, but which one can change during the game, as it depends on their relative location on the board. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +Two Kings can force checkmate on a bare King. +

+Your non-royal King can be exposed to capture, and thus captured. +After that, the remaining King will always be royal. +

+Once both sides are down to a single King, this variant degenerate to orthodox Chess. +

+The spare King is a tough defender, because it cannot be attacked by the opponent's royal King. +So if all the attacker's power is in a single piece, the defending King pair has little to fear when they protect each other. +This makes even KQKK is a draw (provided the Kings can connect). +

+ + diff --git a/whats_new/rules/TwoKings.png b/whats_new/rules/TwoKings.png new file mode 100644 index 0000000..a38ef09 Binary files /dev/null and b/whats_new/rules/TwoKings.png differ diff --git a/whats_new/rules/Wild.html b/whats_new/rules/Wild.html new file mode 100644 index 0000000..d530566 --- /dev/null +++ b/whats_new/rules/Wild.html @@ -0,0 +1,385 @@ + +

+Wild Castle + + +

+ +

Wild Castle

+This is a shuffle variant of normal Chess, which preserves the possibility to do sort of conventional castling, +by starting Rooks always in he corner, and the King on the central files. +When played on an Internet Chess Server, the King can also start on the d-file, and you can castle from there. +This adds nothing to the game, though, it just produces mirror images of other start positions. +So in local mode XBoard does not bother to do this. +

Initial setup

+There is no fixed setup; +the back-rank pieces are randomly shuffled with certain restrictions. +Black's setup is the mirror image of white's, though. +

+e1, e8: King +
+a1, a8, h1, h8: Rook +
+a2-j2, a7-j7: Pawns +

+In addition both sides have: +

+1 Queen +
+2 Bishops +
+2 Knights +

+The Bishops will start on opposite colors. +

+ +

Moves at a Glance

+ +

Click on a piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unblockable leap (capture or non-capture) +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

:
:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+K +	+Can castle with Rook, moving 2 steps towards it +
+Queen +	+Q +	+9.5 +	+RB or Q +	+ +
+Rook +	+R +	+5 +	+R +	+ +
+Bishop +	+B +	+3.25 +	+B +	+Color-bound +
+Knight +	+N +	+3.25 +	+N +	+ +
+Pawn +	+P +	+1 +	+mfWcfF +	+Promotes to Q, R, B, or N on reaching last rank +

Pawn peculiarities

Pawns capture differently from how they move (straight move, diagonal capture).
Pawns can move two squares straight ahead from their initial position, provided they are not blocked.
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
Pawns promote to another (non-royal) piece of choice when they reach last rank.

Castling

General rules

It is not allowed to expose your King to check.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a draw.

Differences with FIDE

+The Queen, Bishops and Knights are randomly shuffled on the back rank in the opening setup. +

Strategy issues

+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +Two Knights cannot do that either. +

+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +

+ + diff --git a/whats_new/rules/Wild.png b/whats_new/rules/Wild.png new file mode 100644 index 0000000..4019be1 Binary files /dev/null and b/whats_new/rules/Wild.png differ diff --git a/whats_new/rules/Xiangqi.html b/whats_new/rules/Xiangqi.html new file mode 100644 index 0000000..f2e77cd --- /dev/null +++ b/whats_new/rules/Xiangqi.html @@ -0,0 +1,403 @@ + +

+Xiangqi + + +

+ +

Xiangqi (Chinese Chess)

+Xiangqi is the World's number one Chess variant in terms of number of players. +Almost all players live in China, Taiwan or Vietnam, though. +It is a fast and aggressive game, often described as a 'race to mate'. +When it gets to an end-game it is often a draw, +because there are many pieces that cannot leave their own board half, +and thus can be used to defend but not to attack or to trade for the opponent's defenders. +

+ +	+ Initial setup + +e0, e9: King + +a0, a9, i0, i9: Rook + +b2, b7, h2, h7: Cannon + +b0, b9, h0, h9: Horse + +d0, d9, f0, f9: Advisor + +c0, c9, g0, g9: Elephant + +a3, c3, e3, g3, i3, a6, c6, e6, g6, i6: Pawns + +

+ +

Moves at a Glance

+ +

Click on a white piece below to see its moves

+ +

+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ Sliding capture or non-capture, can be blocked on any square along the ray +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Non-capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Capture only +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+Unreachable square where move to other square can be blocked +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +
+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +	+ +

+ +

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:
:
:

+ +

+Piece +	+ID +	+value +	+Moves (Betza notation) +	+Remarks +
+King +	+K +	+- +	+W +	+Cannot leave its Palace +
+Rook +	+R +	+10 +	+R +	+ +
+Cannon +	+C +	+4-5 +	+pR +	+Must jump 1 piece to capture +
+Horse +	+H +	+5-4 +	+n[WF] +	+Cannot jump +
+Adviser +	+A +	+2 +	+F +	+ +
+Elephant +	+E +	+2 +	+nA +	+Cannot move onto opponent's board half +
+Pawn +	+P +	+1 +	+fW +	+Acquires sideway moves (fWsW) on opponent's board half +

Pawn peculiarities

Pawns capture and move straight ahead.
When they reach the opponent's board half ('cross the River'), they can also move and capture sideways.
There is no real promotion; when Pawns reach last rank they are stuck there.

General rules

It is not allowed to expose your King to check.
Kings are not allowed to face each other, i.e. be on the same file with nothing in between.
The game is won by checkmating the opponent's King.
Stalemate (no legal moves, but not in check) is a los for the stalemated side.
Perpetual checking is forbidden, and the side that checks is ruled to lose on the 3rd repeat.
When both sides are perpetually checking each other, the game is ruled a draw, however.
It is also forbidden to perpetually harass the same piece other than King (see below).
But when both sides do it, the game is again ruled a draw.

Differences with FIDE

+The board is sub-divided into zones, and some pieces are not allowed to cross some zone boundaries. +Pieces move in general different than their FIDE counterpart. Only the Rook moves truly the same. +

Perpetual Chasing

+It is forbidden to perpetually harass the same piece, +and when a repeat loop (after 3 repeats) has one side violating this rule, that side will forfeit the game. +This is only invoked if there wasn't any perpetual checking in the loop as well. +Exact rules for this are quite complex. +Basically, when a repeat loop creates a new attack on the same unprotected piece on every move, +the move sequence will be considered a perpetual chase. +The chasing side then is ruled to lose, but if both sides are chasing, it is a draw. +A Rook counts as unprotected against attacks of C or H. +On the other hand, being able to capture your attacker (as when equal pieces attack each other) counts as (pre-emptive) protection. +Attacks on a Pawn that is still on its own board half, or attacks by a King are never considered chases. +

+Only legal moves should be taken into account; i.e. pinned pieces are not considered attackers or protectors. +An attack by the same piece is not considered a new one just because the attacking piece moved to another location, +e.g. when a Rook moves along the ray of the attack. +Note that the above rules do not take into account whether the attacking or protecting captures are good or non-sensical, +or if pieces are sufficiently protected against multiple attacks. +Even if recapturing would get you mated in one, the piece would still count as protected! +Also note that is perfectly allowed to alternately chase different pieces. +Even if one of the pieces is a King. +

Strategy issues

+Any piece except a Pawn on the last rank can force Checkmate against a bare King. +

+ + diff --git a/whats_new/rules/Xiangqi.png b/whats_new/rules/Xiangqi.png new file mode 100644 index 0000000..aab564e Binary files /dev/null and b/whats_new/rules/Xiangqi.png differ diff --git a/whats_new/rules/chu.js b/whats_new/rules/chu.js new file mode 100644 index 0000000..cddde07 --- /dev/null +++ b/whats_new/rules/chu.js @@ -0,0 +1,302 @@ +var initDone = 0; +var board; +var save; +var savx; +var savy; +var msg; +var down = 0; +var size = 10; +var bw = 0; + +function set(x, y, n) { + sq = x + 'x' + y; + if(n > 0) { + board[x][y] = document.getElementById(sq).innerHTML; + if(n == 2) + document.getElementById(sq).innerHTML = '

'; + else if(n == 3) + document.getElementById(sq).innerHTML = '

'; + else if(n == 10) + document.getElementById(sq).innerHTML = ''; + else if(n == 4 || n == 8 || n == 20) + document.getElementById(sq).innerHTML = '

'; + else if(n == 5) + document.getElementById(sq).innerHTML = '

'; + else if(n == 15) + document.getElementById(sq).innerHTML = '

'; + else if(n == 9 || n == 45) + document.getElementById(sq).innerHTML = '

'; + else + document.getElementById(sq).innerHTML = '

'; + } else + document.getElementById(sq).innerHTML = board[x][y]; +} + +function text(s, t, n) { + if(t == '') t = ':
:
:'; + if(n) + document.getElementById('piece').innerHTML = s + '
' + t; + else + document.getElementById('piece').innerHTML = ':
:
:
:'; +} + +function slide(x, y, vx, vy, d, n) { + xx = x + vx; yy = y + vy; + if(vx > 1 || vx < -1 || vy > 1 || vy < -1) n = 5*n; + if(d == 2) { + set(xx, yy, 2*n); + xx = xx + vx; yy = yy + vy; d--; n = 5*n; + } + while(d-- > 0 && xx >= bw && xx < size - bw && yy >= 0 && yy < size) { + set(xx, yy, n); + xx = xx + vx; yy = yy + vy; + } +} + +function slide_n(x, y, d, n) { + slide(x, y, 2, 1, d, n); + slide(x, y, 2,-1, d, n); + slide(x, y,-2, 1, d, n); + slide(x, y,-2,-1, d, n); + slide(x, y, 1, 2, d, n); + slide(x, y, 1,-2, d, n); + slide(x, y,-1, 2, d, n); + slide(x, y,-1,-2, d, n); +} + +function slide_f(x, y, d, n) { + slide(x, y, 0, 1, d, n); +} + +function slide_b(x, y, d, n) { + slide(x, y, 0, -1, d, n); +} + +function slide_v(x, y, d, n) { + slide_f(x, y, d, n); + slide_b(x, y, d, n); +} + +function slide_s(x, y, d, n) { + slide(x, y, 1, 0, d, n); + slide(x, y,-1, 0, d, n); +} + +function slide_fd(x, y, d, n) { + slide(x, y, 1, 1, d, n); + slide(x, y,-1, 1, d, n); +} + +function slide_bd(x, y, d, n) { + slide(x, y, 1, -1, d, n); + slide(x, y,-1, -1, d, n); +} + +function slide_diag(x, y, d, n) { + slide_fd(x, y, d, n); + slide_bd(x, y, d, n); +} + +function slide_orth(x, y, d, n) { + slide_v(x, y, d, n); + slide_s(x, y, d, n); +} + +function highlight(x, y, m, n) { + if(0) { + } else if(x > 7 && y == 9) { // castle + slide(x, y,-1-m, 0, 1, 9*n); + slide(x, y, 0, 0, 1, 10*n); + slide(x, y,-2-m, 0, 1, 3*n); + slide(x, y,5-m-x, 0, 1, 2*n); + text('Castling', ': The King and Rook swing around each other
:
:', n); + } else if(x < 2 && y == 9) { // castle + slide(x, y, 2-m, 0, 1, 9*n); + slide(x, y, 0, 0, 1, 10*n); + slide(x, y, 3-m, 0, 1, 3*n); + slide(x, y, 5-m-x, 0, 1, 2*n); + text('Castling', ': The King and Rook swing around each other
:
:', n); + } else if((x == 4 || x == 5) && y == 9) { // castle + slide(x, y, 2+m, 0, 1, 4*n); + slide(x, y,-2-m, 0, 1, 4*n); + text('Castling', ': Click on Rook to see how
:
:', n); + } else if(x == 2 && y == 1) { // FL + slide_fd(x, y, 1, 3*n); + slide_f(x, y, 2, 4*n); + text('Pawn', ': Different capture (red) and non-capture (green)
' + + ': Initial double-push non-capture can be blocked
' + + ': The black Pawn can e.p. capture to the skipped square', n); + } else if(x == 7 && y == 2) { // FL + slide_fd(x, y, 1, 3*n); + slide_f(x, y, 1, 4*n); + text('Pawn', ': Different capture (red) and non-capture (green)
:
:', n); + } else if(x == 2 && y == 5) { // V + slide_v(x, y, size, n); + slide_s(x, y, 1, n); + text('Vertical Mover', '', n); + } else if(x == 2 && y == 4) { // H + slide_s(x, y, size, n); + slide_v(x, y, 1, n); + text('Side Mover', '', n); + } else if(x == 2 && y == 3) { // I + slide_v(x, y, 1, n); + text('Cobra (aka Go Between)', '', n); + } else if(x == 3 && y == 7) { // G + slide_orth(x, y, 1, n); + slide_fd(x, y, 1, n); + text('Gold General', '', n); + } else if(x == 3 && y == 6) { // FL + slide_diag(x, y, 1, n); + slide_v(x, y, 1, n); + text('Ferocious Leopard', '', n); + } else if(x == 3 && y == 5) { // +V + slide_diag(x, y, size, n); + slide_v(x, y, size, n); + text('Narrow Queen (aka Flying Ox)', '', n); + } else if(x == 3 && y == 4) { // +H + slide_diag(x, y, size, n); + slide_s(x, y, size, n); + text('Sleeping Queen (aka Free Boar)', '', n); + } else if(x == 3 && y == 3) { // Ky + slide_diag(x, y, 1, n); + slide(x, y, 2, 0, 1, n); + slide(x, y,-2, 0, 1, n); + slide(x, y, 0,-2, 1, n); + slide(x, y, 0, 2, 1, n); + text('Kylin', '', n); + } else if(x == 3 && y == 2) { // Ky + slide(x, y, 1, 2, 1, n); + slide(x, y,-1, 2, 1, n); + text('(Shogi) Knight', '', n); + } else if(x == 4 && y == 7) { // S + slide_diag(x, y, 1, n); + slide_f(x, y, 1, n); + text('Silver General', '', n); + } else if(x == 4 && y == 6) { // +A + slide_v(x, y, size, n); + slide_bd(x, y, size, n); + text('Whale', '', n); + } else if(x == 4 && y == 5) { // +D + slide_orth(x, y, size, n); + slide_bd(x, y, size, n); + slide_fd(x, y, 2, n); + text('Soaring Eagle', + ': Can shoot or capture en-passant what is on the cyan
' + + ': square with the first of its two steps along the forward
' + + ': diagonal, or jump directly to cyan or orange squares', n); + } else if(x == 4 && y == 4) { // Lion + slide_diag(x, y, 2, n); + slide_orth(x, y, 2, n); + slide_n(x, y, 1, n); + text('Lion', ': Can shoot or capture en-passant what is on the
' + + ': cyan squares with the first of its two King steps,
' + + ': or jump directly to any of the colored squares', n); + } else if(x == 4 && y == 3) { // +L + if(m == 1) { + slide_n(x, y, 1, n); + text('Knight', '', n); + } else { + slide_v(x, y, size, n); + slide_fd(x, y, size, n); + text('White Horse', '', n); + } + } else if(x == 4 && y == 2) { // L + slide_f(x, y, size, n); + text('Lance', '', n); + } else if(x == 5 && y == 7) { // C + slide_fd(x, y, 1, n); + slide_v(x, y, 1, n); + text('Copper General', '', n); + } else if(x == 5 && y == 6) { // +A + slide_v(x, y, size, n); + text('Canon (aka Reverse Chariot)', '', n); + } else if(x == 5 && y == 5) { // +H + slide_diag(x, y, size, n); + slide_s(x, y, size, n); + slide_b(x, y, size, n); + slide_f(x, y, 2, n); + text('Unicorn (aka Horned Falcon)', + ': Can shoot or capture en-passant what is on the cyan
' + + ': square with the first of its two forward/backward
' + + ': steps, or jump directly to cyan or orange square', n); + } else if(x == 5 && y == 4) { // Q + slide_diag(x, y, size, n); + slide_orth(x, y, size, n); + text('Queen', '', n); + } else if(x == 5 && y == 3) { // +BT + slide_v(x, y, size, n); + slide_s(x, y, 1, n); + slide_diag(x, y, 1, n); + text('Flying Stag', '', n); + } else if(x == 5 && y == 2) { // BT + slide_diag(x, y, 1, n); + slide_s(x, y, 1, n); + slide_b(x, y, 1, n); + text('Blind Tiger', '', n); + } else if(x == 6 && y == 7) { // Commoner + slide_diag(x, y, 1, n); + slide_orth(x, y, 1, n); + text('Soldier', '', n); + } else if(x == 6 && y == 6) { // King + slide_diag(x, y, 1, n); + slide_orth(x, y, 1, n); + text('King', '', n); + } else if(x == 6 && y == 5) { // dragon + slide_orth(x, y, size, n); + slide_diag(x, y, 1, n); + text('Dragon King', '', n); + } else if(x == 6 && y == 4) { // horse + slide_diag(x, y, size, n); + slide_orth(x, y, 1, n); + text('Dragon Horse', '', n); + } else if(x == 6 && y == 3) { // Ph + slide_orth(x, y, 1, n); + slide(x, y, 2, 2, 1, n); + slide(x, y,-2, 2, 1, n); + slide(x, y, 2,-2, 1, n); + slide(x, y,-2,-2, 1, n); + text('Phoenix', '', n); + } else if(x == 6 && y == 2) { // P + slide_f(x, y, 1, n); + text('Pawn', '', n); + } else if(x == 7 && y == 6) { // E + slide_diag(x, y, 1, n); + slide_s(x, y, 1, n); + slide_f(x, y, 1, n); + text('Elephant', '', n); + } else if(x == 7 && y == 5) { // rook + slide_orth(x, y, size, n); + text('Rook', '', n); + } else if(x == 7 && y == 4) { // bishop + slide_diag(x, y, size, n); + text('Bishop', '', n); + } +} + +function down_click(x, y) { + if(!initDone) { + initDone = 1; + board = new Array(); + for(i=0; i<12; i = i + 1) board[i] = new Array(); + if(document.getElementById('0x0').innerHTML[1] == ' ') bw = 1; + } + if(down) return; + if(y < 0) { + y = -y; msg = 1; + } else msg = 0; + if(x < 0) { + x = -x; msg = msg + 2; + } + highlight(x, y, msg, 1); + savx = x; savy = y; down = 1; +// save = document.getElementById(sq).innerHTML; +// document.getElementById(sq).innerHTML = ''; +} + +function up_click() { + highlight(savx, savy, msg, 0); + down = 0; +// document.getElementById(x + 'x' + y).innerHTML = save; +} + + diff --git a/whats_new/rules/cwda.js b/whats_new/rules/cwda.js new file mode 100644 index 0000000..830d651 --- /dev/null +++ b/whats_new/rules/cwda.js @@ -0,0 +1,283 @@ +var initDone = 0; +var board; +var save; +var savx; +var savy; +var msg; +var down = 0; +var size = 10; +var bw = 0; + +function set(x, y, n) { + sq = x + 'x' + y; + if(n > 0) { + board[x][y] = document.getElementById(sq).innerHTML; + if(n == 2) + document.getElementById(sq).innerHTML = ''; + else if(n == 3) + document.getElementById(sq).innerHTML = ''; + else if(n == 10) + document.getElementById(sq).innerHTML = ''; + else if(n == 4 || n == 20) + document.getElementById(sq).innerHTML = ''; + else if(n == 5) + document.getElementById(sq).innerHTML = ''; + else if(n == 11) + document.getElementById(sq).innerHTML = ''; + else if(n == 15) + document.getElementById(sq).innerHTML = ''; + else if(n == 30) + document.getElementById(sq).innerHTML = ''; + else if(n == 50) + document.getElementById(sq).innerHTML = ''; + else if(n == 60) + document.getElementById(sq).innerHTML = ''; + else + document.getElementById(sq).innerHTML = ''; + } else + document.getElementById(sq).innerHTML = board[x][y]; +} + +function text(s, t, n) { + if(t == '') t = ':
:
:'; + if(n) + document.getElementById('piece').innerHTML = s + '
' + t; + else + document.getElementById('piece').innerHTML = ':
:
:
:'; +} + +function slide(x, y, vx, vy, d, n) { + xx = x + vx; yy = y + vy; c = d; + if(vx > 1 || vx < -1 || vy > 1 || vy < -1) n = 5*n; + while(d-- > 0 && xx >= bw && xx < size - bw && yy >= 0 && yy < size) { + set(xx, yy, n); + xx = xx + vx; yy = yy + vy; + if(c == 2 && n == 1) n = 5; + } +} + +function slide_n(x, y, d, n) { + slide(x, y, 2, 1, d, n); + slide(x, y, 2,-1, d, n); + slide(x, y,-2, 1, d, n); + slide(x, y,-2,-1, d, n); + slide(x, y, 1, 2, d, n); + slide(x, y, 1,-2, d, n); + slide(x, y,-1, 2, d, n); + slide(x, y,-1,-2, d, n); +} + +function slide_f(x, y, d, n) { + slide(x, y, 0, 1, d, n); +} + +function slide_b(x, y, d, n) { + slide(x, y, 0, -1, d, n); +} + +function slide_v(x, y, d, n) { + slide_f(x, y, d, n); + slide_b(x, y, d, n); +} + +function slide_s(x, y, d, n) { + slide(x, y, 1, 0, d, n); + slide(x, y,-1, 0, d, n); +} + +function slide_fd(x, y, d, n) { + slide(x, y, 1, 1, d, n); + slide(x, y,-1, 1, d, n); +} + +function slide_bd(x, y, d, n) { + slide(x, y, 1, -1, d, n); + slide(x, y,-1, -1, d, n); +} + +function slide_diag(x, y, d, n) { + slide_fd(x, y, d, n); + slide_bd(x, y, d, n); +} + +function slide_orth(x, y, d, n) { + slide_v(x, y, d, n); + slide_s(x, y, d, n); +} + +function highlight(x, y, m, n) { + if(0) { + } else if(x == 1 && y == 9) { // castle + slide(x, y, 0, 0, 1, 10*n); + slide(x, y, 2, 0, 1, 10*n); + slide(x, y, 3, 0, 1, 3*n); + slide(x, y, 4, 0, 1, 2*n); + text('Castling', ': King and corner piece swing around each other
:
:', n); + } else if(x == 8 && y == 9) { // castle + slide(x, y, 0, 0, 1, 10*n); + slide(x, y,-1, 0, 1, 50*n); + slide(x, y,-2, 0, 1, 3*n); + slide(x, y,-3, 0, 1, 2*n); + text('Castling', ': King and corner piece swing around each other
:
:', n); + } else if(x == 5 && y == 9) { // castle + slide(x, y, 2, 0, 1, 4*n); + slide(x, y,-2, 0, 1, 4*n); + text('Castling', ': Click on a corner piece to see how
:
:', n); + } else if(x == 1 && y == 0) { // castle + slide(x, y, 0, 0, 1, 10*n); + slide(x, y, 1, 0, 1, 60*n); + slide(x, y, 2, 0, 1, 6*n); + slide(x, y, 4, 0, 1, 2*n); + text('Castling', ': King and corner piece swing around each other
' + + ': King goes to b1, to keep its partner on same color!
:', n); + } else if(x == 8 && y == 0) { // castle + slide(x, y, 0, 0, 1, 10*n); + slide(x, y,-1, 0, 1, 60*n); + slide(x, y,-2, 0, 1, 6*n); + slide(x, y,-3, 0, 1, 2*n); + text('Castling', ': King and corner piece swing around each other
:
:', n); + } else if(x == 5 && y == 0) { // castle + slide(x, y, 2, 0, 1, 4*n); + slide(x, y,-3, 0, 1, 4*n); + text('Castling with color-bound corner piece', ': Click on a corner piece to see how
:
:', n); + } else if(x == 1 && y == 3) { // FL + slide(x, y, 1, 0, 1, 10*n); + slide(x, y, 1,-1, 1, 11*n); + slide(x, y, 0, 0, 1, 10*n); + text('en-passant capture', ': A Pawn that just made a double-push past you
: is caught by its tail
:', n); + } else if(x == 2 && y == 1) { // FL + slide_fd(x, y, 1, 3*n); + slide_f(x, y, 2, 4*n); + if(m == 2) text('Pawn', ': Different capture (red) and non-capture (green)
' + + ': Initial double-push non-capture can be blocked
' + + ': The black Pawn can e.p. capture to the skipped square', n); + else text('Pawn', ': Different capture (red) and non-capture (green)
:
:', n); + } else if(x == 2 && y == 3) { // FL + slide_fd(x, y, 1, 3*n); + slide_f(x, y, 1, 4*n); + text('Pawn', ': Different capture (red) and non-capture (green)
:
:', n); + } else if(x == 3 && y == 6) { // FL + slide_orth(x, y, size, n); + text('Rook', '', n); + } else if(x == 3 && y == 5) { // +V + slide_orth(x, y, 4, n); + text('Short Rook', ': Slides upto 4 squares
:
:', n); + } else if(x == 3 && y == 4) { // +H + slide_orth(x, y, 1, n); + slide(x, y, 2, 2, 1, n); + slide(x, y,-2, 2, 1, n); + slide(x, y, 2,-2, 1, n); + slide(x, y,-2,-2, 1, n); + text('Elephant', '', n); + } else if(x == 3 && y == 3) { // fibnif + slide_diag(x, y, 1, n); + slide(x, y, 1, 2, 1, n); + slide(x, y,-1, 2, 1, n); + slide(x, y, 1,-2, 1, n); + slide(x, y,-1,-2, 1, n); + text('Horse', '', n); + } else if(x == 4 && y == 6) { // +A + slide_n(x, y, 1, n); + text('Knight', '', n); + } else if(x == 4 && y == 5) { // +D + slide_diag(x, y, 1, n); + slide(x, y, 2, 0, 1, n); + slide(x, y,-2, 0, 1, n); + slide(x, y, 0,-2, 1, n); + slide(x, y, 0, 2, 1, n); + slide(x, y, 3, 0, 1, n); + slide(x, y,-3, 0, 1, n); + slide(x, y, 0,-3, 1, n); + slide(x, y, 0, 3, 1, n); + text('Half-Duck', '', n); + } else if(x == 4 && y == 4) { // Lion + slide_diag(x, y, size, n); + slide(x, y, 2, 0, 1, n); + slide(x, y,-2, 0, 1, n); + slide(x, y, 0,-2, 1, n); + slide(x, y, 0, 2, 1, n); + text('Leaping Bishop', ': Color bound
:
:', n); + } else if(x == 4 && y == 3) { // +L + slide(x, y, 1, 2, 1, n); + slide(x, y,-1, 2, 1, n); + slide(x, y, 2, 1, 1, n); + slide(x, y,-2, 1, 1, n); + slide_b(x, y, 1, n); + slide_s(x, y, 1, n); + slide_bd(x, y, 1, n); + text('Unicorn', '', n); + } else if(x == 5 && y == 6) { // +A + slide_orth(x, y, size, n); + slide_diag(x, y, size, n); + text('Queen', '', n); + } else if(x == 5 && y == 5) { // +H + slide_orth(x, y, size, n); + slide_n(x, y, 1, n); + text('Marshall', '', n); + } else if(x == 5 && y == 4) { // Q + slide_diag(x, y, size, n); + slide_n(x, y, 1, n); + text('Archbishop', '', n); + } else if(x == 5 && y == 3) { + slide(x, y, 1, 2, 1, n); + slide(x, y,-1, 2, 1, n); + slide(x, y, 2, 1, 1, n); + slide(x, y,-2, 1, 1, n); + slide_diag(x, y, 1, n); + slide_f(x, y, size, n); + slide_s(x, y, size, n); + slide_b(x, y, 1, n); + text('Colonel', '', n); + } else if(x == 6 && y == 6) { // B + slide_diag(x, y, size, n); + text('Bishop', '', n); + } else if(x == 6 && y == 5) { // dragon + slide_orth(x, y, 2, n); + text('Woody', '', n); + } else if(x == 6 && y == 4) { // horse + slide(x, y, 2, 0, 1, n); + slide(x, y,-2, 0, 1, n); + slide(x, y, 0,-2, 1, n); + slide(x, y, 0, 2, 1, n); + slide_diag(x, y, 2, n); + text('Clobberer', ': Color bound
:
:', n); + } else if(x == 6 && y == 3) { // Ph + slide_b(x, y, 1, n); + slide_bd(x, y, 1, n); + slide_f(x, y, size, n); + slide_s(x, y, size, n); + text('Turret', '', n); + } else if(x == 7 && y == 6) { // Ph + slide_diag(x, y, 1, n); + slide_orth(x, y, 1, n); + text('King', '', n); + } +} + +function down_click(x, y) { + if(!initDone) { + initDone = 1; + board = new Array(); + for(i=0; i<12; i = i + 1) board[i] = new Array(); + if(document.getElementById('0x0').innerHTML[1] == ' ') bw = 1; + } + if(down) return; + if(y < 0) { + y = -y; msg = 1; + } else msg = 0; + if(x < 0) { + x = -x; msg = msg + 2; + } + highlight(x, y, msg, 1); + savx = x; savy = y; down = 1; +// save = document.getElementById(sq).innerHTML; +// document.getElementById(sq).innerHTML = ''; +} + +function up_click() { + highlight(savx, savy, msg, 0); + down = 0; +// document.getElementById(x + 'x' + y).innerHTML = save; +} + + diff --git a/whats_new/rules/index.html b/whats_new/rules/index.html new file mode 100644 index 0000000..ebe1e72 --- /dev/null +++ b/whats_new/rules/index.html @@ -0,0 +1,159 @@ + +
+Variants supported by XBoard +
+ + +
Chess variants supported by XBoard
+
+Next to orthodox Chess (aka FIDE or Mad Queen), XBoard supports many other Chess variants. +This includes the World's major forms of Chess: Chinese, FIDE, Japanese, and Thai Chess. +But also many popular western variants (Suicide Chess, Crazyhouse, Chess960, Gothic/Capablanca Chess, Seirawan Chess). +
+
+Full support by XBoard means that the latter is fully aware of how all pieces move, and what the winning condition is. +This means the variant can be played with the option Test Legality switched on, +and that it can accurately check any result claims that engines make. +Non-supported variants can often be played with legality checking switched off. +Then any of the 22 piece types known by XBoard can be used in ways XBoard does not expect. +The only real drawback of this is that the game notation looks a bit crummy, +with many spurious or missing disambiguators, check and checkmate symbols. +XBoard will always be able to read suh games back, however (as on reading it suffers from the same misconceptions on piece movement). +This can be kept baerable by choosing XBoard supported pieces to represent the unsupported ones that +move as similar as possible. +
+
+Some variants are only partially supported. +This means they have to be played with legality checking off, +although XBoard knows they exist, and even implements some of their rules that no other variant would allow. +For instance, in Berolina Chess Pawns move diagonally, and in any other variant this would lead to disappearence +of other Pawns during the game, as normally XBoard interprets a diagonal Pawn move to an empty square as e.p. capture. +
+
+The following list tries to group all variants by properties. +Some duplicates occur when a variant fits in more than one group. +
+
List of supported variants
+
+ + += recommended +
+FIDE Chess The modern international game, second in popularity only to Xiangqi +
+Shuffle games with normal pieces +
+Wild Castle Shuffles the initial FIDE setup, leaving King and Rooks in place +
+No Castle More aggressive shuffling of the initial FIDE setup, without castling +
+Chess960 A Shuffle variant where even Kings and Rooks in non-standard location can castle +
+Variants with piece drops +
+Crazyhouse Pieces you capture are added to your army, by dropping them back onto the board +
+Bughouse four-player game that XBoard can only play with the aid of an Internet Chess Server +
+Shogi Japanese Chess, where pieces you captured can be dropped to strengthen your own army +
+mini-Shogi Highly simplified and very tactical mini version of Shogi (on 5x5 board) +
+Unusual winning conditions +
+Suicide Chess Win by getting rid of all your material by mandatory capture +
+Give-Away Chess Win by getting rid of all your material by mandatory capture +
+Losers Chess Win by being left with a bare King +
+3-checks Lose by being checked 3 times +
+Variants with various intrusive rules +
+Atomic Chess Pieces that capture explode, destroying anything in the vicinity +
+Cylinder Chess The a-file and h-file connect to make the board a cylinder +
+TwoKings Play with two Kings, changing which one is royal during the game +
+Variants where just a few pieces move in unorthodox ways +
+Shatranj Ancient Arabic/Persian Chess, with primitive Queen and Bishops +
+Berolina Chess Pawns capture straight ahead, and move diagonally +
+ASEAN South-East Asian Chess, a modernized version of Makruk +
+Knightmate Try to checkmate a single Royal Knight with (amongst others) two non-royal Kings +
+Falcon Chess Two (Rook-class) Falcon pieces augment FIDE on a 10-wide board +
+Mighty-Lion Chess All-powerful Lions can capture other pieces en-passant, or two pieces at once +
+Variants with extra Rook-Knight and Bishop-Knight compound pieces +
+Seirawan Chess Two extra super-pieces can be 'gated' onto the board during the opening +
+Capablanca Chess Two super-pieces are added to FIDE on a 10-wide board +
+Gothic Chess Two super-pieces are added to FIDE on a 10-wide board, with stream-lined initial setup +
+Janus Chess Two Janus super-pieces (B-N compounds) are added to FIDE on a 10-wide board +
+Capablanca Random Chess Capablanca Chess with shuffled initial setup, with generalized castling rules +
+Grand Chess Chess on a 10x10 board with two extra super-pieces +
+Oriental forms of Chess +
+Xiangqi Chinese Chess, where the King is confined to a Palace +
+Shogi Japanese Chess, where pieces you captured can be dropped to strengthen your own army +
+Sho Shogi Ancient precurser of the modern Japanese 9x9 Shogi game (without drops) +
+Chu Shogi Ancient Japanese Chess with many pieces on a 12x12 board, and a Lion super-piece +
+Makruk Thai Chess, with an interesting Elephant piece +
+ASEAN South-East Asian Chess, a modernized version of Makruk +
+Variants with mostly un-orthodox pieces +
+Courier Chess Mediaval precursor of Chess, combining Shatranj with modern pieces on a wide board +
+Superchess Randomly picked unorthodox pieces of many kinds replace some of your FIDE pieces +
+Great Shatranj Version of Capablanca Chess that replaces all sliding moves by 2-square jumps +
+Spartan Chess Two different armies (Persians and Spartans, the latter lead by two Kings) battle each other +
+Chess with Different Armies Pick one of a set of (mostly) unsual armies to battle a completely different army +
+Chu Shogi Ancient Japanese Chess with many pieces on a 12x12 board, and a Lion super-piece +
+Chu Chess Intermediate between Chess and Chu shogi, on a 10x10 board +
+Cambodian Chess +
+Ai-Wok Makruk +
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ + + + diff --git a/whats_new/rules/move.js b/whats_new/rules/move.js new file mode 100644 index 0000000..6210622 --- /dev/null +++ b/whats_new/rules/move.js @@ -0,0 +1,245 @@ +var initDone = 0; +var board; +var save; +var savx; +var savy; +var down = 0; +var size = 10; + +function set(x, y, n) { + sq = x + 'x' + y; + if(n > 0) { + board[x][y] = document.getElementById(sq).innerHTML; + if(n == 1) + document.getElementById(sq).innerHTML = ''; + else if(n == 3) + document.getElementById(sq).innerHTML = ''; + else + document.getElementById(sq).innerHTML = ''; + } else + document.getElementById(sq).innerHTML = board[x][y]; +} + +function text(s, t, n) { + if(t == '') t = ':
:
:'; + if(n) + document.getElementById('piece').innerHTML = s + '
' + t; + else + document.getElementById('piece').innerHTML = ':
:
:
:'; +} + +function slide(x, y, vx, vy, d, n) { + xx = x + vx; yy = y + vy; + if(d == 2) { + set(xx, yy, 2*n); + xx = xx + vx; yy = yy + vy; d--; n = 3*n; + } + while(d-- > 0 && xx >= 0 && xx < size && yy >= 0 && yy < size) { + set(xx, yy, n); + xx = xx + vx; yy = yy + vy; + } +} + +function slide_n(x, y, d, n) { + slide(x, y, 2, 1, d, 3*n); + slide(x, y, 2,-1, d, 3*n); + slide(x, y,-2, 1, d, 3*n); + slide(x, y,-2,-1, d, 3*n); + slide(x, y, 1, 2, d, 3*n); + slide(x, y, 1,-2, d, 3*n); + slide(x, y,-1, 2, d, 3*n); + slide(x, y,-1,-2, d, 3*n); +} + +function slide_f(x, y, d, n) { + slide(x, y, 0, 1, d, n); +} + +function slide_b(x, y, d, n) { + slide(x, y, 0, -1, d, n); +} + +function slide_v(x, y, d, n) { + slide_f(x, y, d, n); + slide_b(x, y, d, n); +} + +function slide_s(x, y, d, n) { + slide(x, y, 1, 0, d, n); + slide(x, y,-1, 0, d, n); +} + +function slide_fd(x, y, d, n) { + slide(x, y, 1, 1, d, n); + slide(x, y,-1, 1, d, n); +} + +function slide_bd(x, y, d, n) { + slide(x, y, 1, -1, d, n); + slide(x, y,-1, -1, d, n); +} + +function slide_diag(x, y, d, n) { + slide_fd(x, y, d, n); + slide_bd(x, y, d, n); +} + +function slide_orth(x, y, d, n) { + slide_v(x, y, d, n); + slide_s(x, y, d, n); +} + +function highlight(x, y, n) { + if(0) { + } else if(x == 2 && y == 5) { // V + slide_v(x, y, size, n); + slide_s(x, y, 1, n); + text('Vertical Mover', '', n); + } else if(x == 2 && y == 4) { // H + slide_s(x, y, size, n); + slide_v(x, y, 1, n); + text('Side Mover', '', n); + } else if(x == 2 && y == 3) { // I + slide_v(x, y, 1, n); + text('Cobra (aka Go Between)', '', n); + } else if(x == 3 && y == 7) { // G + slide_orth(x, y, 1, n); + slide_fd(x, y, 1, n); + text('Gold General', '', n); + } else if(x == 3 && y == 6) { // FL + slide_diag(x, y, 1, n); + slide_v(x, y, 1, n); + text('Ferocious Leopard', '', n); + } else if(x == 3 && y == 5) { // +V + slide_diag(x, y, size, n); + slide_v(x, y, size, n); + text('Narrow Queen (aka Flying Ox)', '', n); + } else if(x == 3 && y == 4) { // +H + slide_diag(x, y, size, n); + slide_s(x, y, size, n); + text('Sleeping Queen (aka Free Boar)', '', n); + } else if(x == 3 && y == 3) { // Ky + slide_diag(x, y, 1, n); + slide(x, y, 2, 0, 1, n); + slide(x, y,-2, 0, 1, n); + slide(x, y, 0,-2, 1, n); + slide(x, y, 0, 2, 1, n); + text('Kylin', '', n); + } else if(x == 4 && y == 7) { // S + slide_diag(x, y, 1, n); + slide_f(x, y, 1, n); + text('Silver General', '', n); + } else if(x == 4 && y == 6) { // +A + slide_v(x, y, size, n); + slide_bd(x, y, size, n); + text('Whale', '', n); + } else if(x == 4 && y == 5) { // +D + slide_orth(x, y, size, n); + slide_bd(x, y, size, n); + slide_fd(x, y, 2, n); + text('Soaring Eagle', + ': Can shoot or capture en-passant what is on the cyan
' + + ': square with the first of its two steps along the forward
' + + ': diagonal, or jump directly to cyan or red squares', n); + } else if(x == 4 && y == 4) { // Lion + slide_diag(x, y, 2, n); + slide_orth(x, y, 2, n); + slide_n(x, y, 1, n); + text('Lion', ': Can shoot or capture en-passant what is on the
' + + ': cyan squares with the first of its two King steps,
' + + ': or jump directly to any of the colored squares', n); + } else if(x == 4 && y == 3) { // +L + slide_v(x, y, size, n); + slide_fd(x, y, size, n); + text('White Horse', '', n); + } else if(x == 4 && y == 2) { // L + slide_f(x, y, size, n); + text('Lance', '', n); + } else if(x == 5 && y == 7) { // C + slide_fd(x, y, 1, n); + slide_v(x, y, 1, n); + text('Copper General', '', n); + } else if(x == 5 && y == 6) { // +A + slide_v(x, y, size, n); + text('Canon (aka Reverse Chariot)', '', n); + } else if(x == 5 && y == 5) { // +H + slide_diag(x, y, size, n); + slide_s(x, y, size, n); + slide_b(x, y, size, n); + slide_f(x, y, 2, n); + text('Unicorn (aka Horned Falcon)', + ': Can shoot or capture en-passant what is on the cyan
' + + ': square with the first of its two forward/backward
' + + ': steps, or jump directly to cyan or red square', n); + } else if(x == 5 && y == 4) { // Q + slide_diag(x, y, size, n); + slide_orth(x, y, size, n); + text('Queen', '', n); + } else if(x == 5 && y == 3) { // +BT + slide_v(x, y, size, n); + slide_s(x, y, 1, n); + slide_diag(x, y, 1, n); + text('Flying Stag', '', n); + } else if(x == 5 && y == 2) { // BT + slide_diag(x, y, 1, n); + slide_s(x, y, 1, n); + slide_b(x, y, 1, n); + text('Blind Tiger', '', n); + } else if(x == 6 && y == 6) { // King + slide_diag(x, y, 1, n); + slide_orth(x, y, 1, n); + text('King', '', n); + } else if(x == 6 && y == 5) { // dragon + slide_orth(x, y, size, n); + slide_diag(x, y, 1, n); + text('Dragon King', '', n); + } else if(x == 6 && y == 4) { // horse + slide_diag(x, y, size, n); + slide_orth(x, y, 1, n); + text('Dragon Horse', '', n); + } else if(x == 6 && y == 3) { // Ph + slide_orth(x, y, 1, n); + slide(x, y, 2, 2, 1, n); + slide(x, y,-2, 2, 1, n); + slide(x, y, 2,-2, 1, n); + slide(x, y,-2,-2, 1, n); + text('Phoenix', '', n); + } else if(x == 6 && y == 2) { // P + slide_f(x, y, 1, n); + text('Pawn', '', n); + } else if(x == 7 && y == 6) { // E + slide_diag(x, y, 1, n); + slide_s(x, y, 1, n); + slide_f(x, y, 1, n); + text('Elephant', '', n); + } else if(x == 7 && y == 5) { // rook + slide_orth(x, y, size, n); + text('Rook', '', n); + } else if(x == 7 && y == 4) { // bishop + slide_diag(x, y, size, n); + text('Bishop', '', n); + } +} + +function down_click(x, y) { + if(!initDone) { + initDone = 1; + board = new Array(); + for(i=0; i<12; i = i + 1) board[i] = new Array(); + } + if(down) return; + highlight(x, y, 1); + savx = x; savy = y; down = 1; +// sq = x + 'x' + y; +// sq = '7x5'; +// save = document.getElementById(sq).innerHTML; +// document.getElementById(sq).innerHTML = ''; +} + +function up_click() { + highlight(savx, savy, 0); + down = 0; +// document.getElementById(x + 'x' + y).innerHTML = save; +} + + diff --git a/whats_new/rules/moves.css b/whats_new/rules/moves.css new file mode 100644 index 0000000..48f33b7 --- /dev/null +++ b/whats_new/rules/moves.css @@ -0,0 +1,36 @@ +table.board { + border-collapse: collapse; + overflow: hide; +} +table.board td { + width: 36px; height: 36px; vertical-align: center; + text-align: center; +} +table.board tr.toplegend td { + height: 15px; + text-align: right; +} +table.board td.leftlegend { + width: 15px; height: 36px; +} +table.board tr.toplegend td.corner { + border: none; width: 15px; +} +table.board td img { + display: block; +} +table.board td.w { + background: #FFFFFF; color: black; height: 36px; width: 360px; + text-align: left; +} +table.board td.b { + background: #FFFFFF; color: white; height: 72px; width: 36px; +} +table.board td.h { + background: #FFFFFF; color: black; height: 36px; width: 36px; +} +table.board td.n { + background: #C0C0C0; color: black; height: 36px; width: 36px; + border: 1px solid black; +} + diff --git a/whats_new/rules/spartan.js b/whats_new/rules/spartan.js new file mode 100644 index 0000000..62e4887 --- /dev/null +++ b/whats_new/rules/spartan.js @@ -0,0 +1,323 @@ +var initDone = 0; +var board; +var save; +var savx; +var savy; +var msg; +var down = 0; +var size = 10; +var bw = 0; + +function set(x, y, n) { + sq = x + 'x' + y; + if(n > 0) { + board[x][y] = document.getElementById(sq).innerHTML; + if(n == 2) + document.getElementById(sq).innerHTML = ''; + else if(n == 3 || n == 25) + document.getElementById(sq).innerHTML = ''; + else if(n == 10) + document.getElementById(sq).innerHTML = ''; + else if(n == 4 || n == 20) + document.getElementById(sq).innerHTML = ''; + else if(n == 5) + document.getElementById(sq).innerHTML = ''; + else if(n == 7) + document.getElementById(sq).innerHTML = ''; + else if(n == 8) + document.getElementById(sq).innerHTML = ''; + else if(n == 11) + document.getElementById(sq).innerHTML = ''; + else if(n == 15) + document.getElementById(sq).innerHTML = ''; + else if(n == 9 || n == 45) + document.getElementById(sq).innerHTML = ''; + else if(n == 40) + document.getElementById(sq).innerHTML = ''; + else if(n == 50) + document.getElementById(sq).innerHTML = ''; + else if(n == 12 || n == 60) + document.getElementById(sq).innerHTML = ''; + else + document.getElementById(sq).innerHTML = ''; + } else + document.getElementById(sq).innerHTML = board[x][y]; +} + +function text(s, t, n) { + if(t == '') t = ':
:
:'; + if(n) + document.getElementById('piece').innerHTML = s + '
' + t; + else + document.getElementById('piece').innerHTML = ':
:
:
:'; +} + +function slide(x, y, vx, vy, d, n) { + xx = x + vx; yy = y + vy; c = d; + if(vx > 1 || vx < -1 || vy > 1 || vy < -1) n = 5*n; + while(d-- > 0 && xx >= bw && xx < size - bw && yy >= 0 && yy < size) { + set(xx, yy, n); + xx = xx + vx; yy = yy + vy; + if(c == 2 && n == 1) n = 5; + } +} + +function slide_n(x, y, d, n) { + slide(x, y, 2, 1, d, n); + slide(x, y, 2,-1, d, n); + slide(x, y,-2, 1, d, n); + slide(x, y,-2,-1, d, n); + slide(x, y, 1, 2, d, n); + slide(x, y, 1,-2, d, n); + slide(x, y,-1, 2, d, n); + slide(x, y,-1,-2, d, n); +} + +function slide_f(x, y, d, n) { + slide(x, y, 0, 1, d, n); +} + +function slide_b(x, y, d, n) { + slide(x, y, 0, -1, d, n); +} + +function slide_v(x, y, d, n) { + slide_f(x, y, d, n); + slide_b(x, y, d, n); +} + +function slide_s(x, y, d, n) { + slide(x, y, 1, 0, d, n); + slide(x, y,-1, 0, d, n); +} + +function slide_fd(x, y, d, n) { + slide(x, y, 1, 1, d, n); + slide(x, y,-1, 1, d, n); +} + +function slide_bd(x, y, d, n) { + slide(x, y, 1, -1, d, n); + slide(x, y,-1, -1, d, n); +} + +function slide_diag(x, y, d, n) { + slide_fd(x, y, d, n); + slide_bd(x, y, d, n); +} + +function slide_orth(x, y, d, n) { + slide_v(x, y, d, n); + slide_s(x, y, d, n); +} + +function highlight(x, y, m, n) { + if(0) { + } else if(x < 4 && y == 9) { // O-O-O + if(x == 3) { x = 1; p = 12; } else p = (45-36*m); // Knightmate + if(x == 2) { x = 0; z = 1; } else z = x; // Janus + slide(x, y, 2 + m, 0, 1, 3*n); + slide(x, y, 1 + m, 0, 1, p*n); + slide(x, y, 5 - z, 0, 1, 2*n); + slide(x, y, 0, 0, 1, 10*n); + text('Castling', ': King and Rook swing around each other
:
:', n); + } else if(x > 6 && y == 9) { // O-O + if(m == 2) { z = x + 1; m = 0; } else z = x; // King left + if(x == 7) { x = 8; p = 12; z = x; } else p = (45-36*m); // Knightmate + slide(x, y,-2 - m, 0, 1, 3*n); + slide(x, y,-1 - m, 0, 1, p*n); + slide(x, y, 5 - z, 0, 1, 2*n); + slide(x, y, 0, 0, 1, 10*n); + text('Castling', ': King and Rook swing around each other
:
:', n); + } else if((x == 4 || x == 5) && y == 9) { // castle + if(m == 0) f = 15; else f = 3; + slide(x, y, 2 + m, 0, 1, 4*n); + if(m == 2) m = 1; + slide(x, y,-2 - m, 0, 1, 4*n); + text('Castling', ': Click on Rook to see how
:
:', n); + } else if(x == 1 && y == 3) { // FIDE e.p. + slide(x, y, 1, 0, 1, 10*n); + slide(x, y, 1,-1, 1, 11*n); + slide(x, y, 0, 0, 1, 10*n); + text('en-passant capture', ': A Pawn that just made a double-push past you
: is caught by its tail
:', n); + } else if((x == 2 || x == 4) && y == 8) { // Berolina double-push + slide_bd(x, y, 2, 4*n); + slide_b(x, y, 1, 3*n); + if(m == 1) text('Hoplit', ': Different capture (red) and non-capture (green)
' + + ': Initial double-push non-capture can jump!
:', n); + else text('Berlin Pawn', ': Different capture (red) and non-capture (green)
' + + ': Initial double-push non-capture can be blocked
' + + ': The white Pawn can e.p. capture to the skipped square in front of it', n); + } else if(x == 2 && y == 1) { // FIDE double-push + slide_fd(x, y, 1, 3*n); + slide_f(x, y, 2, 4*n); + if(m == 2) text('Pawn', ': Different capture (red) and non-capture (green)
' + + ': Initial double-push non-capture can be blocked
' + + ': The black Pawn can e.p. capture to the skipped square', n); else + if(m == 1) text('Pawn', ': Different capture (red) and non-capture (green)
' + + ': Initial double-push non-capture can be blocked
:', n); + else text('Pawn', ': Different capture (red) and non-capture (green)
:
:', n); + } else if(x == 2 && y == 6) { // Berolina + slide_bd(x, y, 1, 4*n); + slide_b(x, y, 1, 3*n); + if(m == 1) text('Hoplit', ': Different capture (red) and non-capture (green)
:
:', n); + else text('Berlin Pawn', ': Different capture (red) and non-capture (green)
:
:', n); + } else if(x == 2 && y == 3) { // FIDE Pawn + slide_fd(x, y, 1, 3*n); + slide_f(x, y, 1, 4*n); + text('Pawn', ': Different capture (red) and non-capture (green)
:
:', n); + } else if(x == 2 && y == 5) { // XQ passed Pawn + slide_f(x, y, 1, n); + slide_s(x, y, 1, n); + text('Pawn (across the River)', '', n); + } else if(x == 2 && y == 2) { // XQ Pawn + slide_f(x, y, 1, n); + text('Pawn', '', n); + } else if(x == 3 && y == 6) { // Modern Elephant + if(m == 1) { // Berolina e.p. + slide(x, y, 0, 0, 1, 10*n); + slide(x, y,-1, 0, 1, 10*n); + slide(x, y, 0, 1, 1, 8*n); + text('en-passant capture', ': A Pawn that just made a double-push
' + + ': crossing your path is caught by its tail
' + + ': (Note the other white Pawn can NOT capture it!)', n); + return; + } + slide_diag(x, y, 2, n); + if(m == 2) text('Modern Elephant', '', n); else { + slide_s(x, y, 1, 4*n); + text('Lieutenant', ': Jumps directly to orange squares
' + + ': Sideway step non-capture only
:', n); + } + } else if(x == 3 && y == 5) { // KAD + slide_orth(x, y, 2, n); + slide_diag(x, y, 2, n); + text('Great General', '', n); + } else if(x == 3 && y == 4) { // KN / NAD + slide_n(x, y, 1, n); + slide_diag(x, y, 2 - m, n); + if(m == 1) { text('Veteran', '', n); slide_orth(x, y, 1, n); } + else text('High Priestess', '', n); + } else if(x == 3 && y == 3) { // FvN + slide_orth(x, y, size, n); + text('Rook', '', n); + } else if(x == 4 && y == 6) { // Dragon + slide_diag(x, y, 1, n); + slide_orth(x, y, size, n); + text('General', '', n); + } else if(x == 4 && y == 5) { // F + slide_diag(x, y, 1, n); + if(m == 2) text('Advisor (aka Mandarin or Palace Guard)', ': Cannot leave Palace
:
:', n); else + if(m == 1) text('Met (aka Ferz, General)', '', n); + else text('Ferz (aka General)', '', n); + } else if(x == 4 && y == 4) { // Amazon / NWD + slide_n(x, y, 1, n); + slide_orth(x, y, 2 + m*size, n); + if(m == 1) { text('Amazon', '', n); slide_diag(x, y, size, n); } + else text('Minister', '', n); + } else if(x == 4 && y == 3) { // N + if(m == 2) { slide_orth(x, y, 1, 7*n); f = 6; } else f = 1; + slide_n(x, y, 1, f*n); + if(m == 2) text('Horse', ': Moves can be blocked on the adjacent square
' + + ': marked with open circle, to which it cannot move
:', n); else + if(m == 1) text('Royal Knight', ': Royal piece that has to be checkmated
:
:', n); + else text('Knight', '', n); + } else if(x == 5 && (y == 6 || y == 10)) { // BN + if(y == 10) { text('Hawk', '', n); y = 6; } else + if(m == 3) text('Janus', '', n); else + if(m == 2) text('Princess', '', n); else + if(m == 1) text('Warlord', '', n); + else text('Archbishop', '', n); + slide_diag(x, y, size, n); + slide_n(x, y, 1, n); + } else if(x == 5 && y == 5) { // Alfil / XQ Elephant + f = n*(1 + 5*m); + slide(x, y, 2, 2, 1, f); + slide(x, y,-2, 2, 1, f); + slide(x, y, 2,-2, 1, f); + slide(x, y,-2,-2, 1, f); + if(m == 1) { + slide_diag(x, y, 1, 7*n); + text('Elephant', ': Can be blocked on the nearest square marked
' + + ': with open circle, to which it cannot move
' + + ': It cannot cross the River separating board halves', n); + } else + text('Elephant (aka Alfil)', '', n); + } else if(x == 5 && y == 4) { // RN + slide_orth(x, y, size, n); + slide_n(x, y, 1, n); + if(m == 3) text('Empress', '', n); else + if(m == 2) text('Elephant', '', n); else + if(m == 1) text('Marshall', '', n); + else text('Chancellor', '', n); + } else if(x == 5 && y == 3) { // Q + slide_orth(x, y, size, n); + slide_diag(x, y, size, n); + text('Queen', '', n); + } else if(x == 6 && y == 6) { // WD + slide_orth(x, y, 2, n); + if(m == 2) text('War Machine', '', n); + else text('Captain', ': Jumps directly to orange squares
:
:', n); + } else if(x == 6 && y == 5) { // Wazir + slide_orth(x, y, 1, n); + if(m == 1) text('King (aka General)', ': Royal piece that has to be checkmated
: Cannot leave Palace
:', n); + else text('Wazir (aka Grandvizer)', '', n); + } else if(x == 6 && y == 4) { // NN + slide_n(x, y, size, 4*n); + text('Nightrider', '', n); + } else if(x == 6 && y == 3) { // B + slide_diag(x, y, size, n); + text('Bishop', '', n); + } else if(x == 6 && y == 2) { // Silver + slide_diag(x, y, 1, n); + slide_f(x, y, 1, n); + text('Elephant', '', n); + } else if(x == 7 && y == 2) { // XQ Canon + slide_v(x, y, 3, 4*n); + slide_s(x, y, 4, 4*n); + slide(x, y, 0, 7, 1, 5*n); + slide(x, y,-6, 0, 1, 5*n); + text('Canon', ': Slides non-capturing to first obstacle
' + + ': and can capture first piece behind that
:', n); + } else if(x == 7 && y == 0) { // Gating + slide(x, y, 0, 0, 1, 50*n); + slide(x, y,-1, 2, 1, 8*n); + bw = 0; slide(x, y, 2, 0, 1, 2*n); bw = 1; + text('Gating:', ': On the first move of a back-rank piece
' + + ': your Hawk or Elephant can appear from under it
:', n); + } else if(x == 7 && (y == 3 || y == 6)) { // K + slide_orth(x, y, 1, n); + slide_diag(x, y, 1, n); + if(m == 2) text('Soldier', '', n); else + if(m == 1) text('Commoner (aka Man)', '', n); + else text('King', '', n); + } +} + +function down_click(x, y) { + if(!initDone) { + initDone = 1; + board = new Array(); + for(i=0; i<12; i = i + 1) board[i] = new Array(); + if(document.getElementById('0x0').innerHTML[1] == ' ') bw = 1; + } + if(down) return; + if(y < 0) { + y = -y; msg = 1; + } else msg = 0; + if(x < 0) { + x = -x; msg = msg + 2; + } + highlight(x, y, msg, 1); + savx = x; savy = y; down = 1; +// save = document.getElementById(sq).innerHTML; +// document.getElementById(sq).innerHTML = ''; +} + +function up_click() { + highlight(savx, savy, msg, 0); + down = 0; +// document.getElementById(x + 'x' + y).innerHTML = save; +} + + diff --git a/whats_new/rules/sym/BlackAdvisor.png b/whats_new/rules/sym/BlackAdvisor.png new file mode 100644 index 0000000..c48daa5 Binary files 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icon_black.png +rsvg -h 33 -w 33 icon_white.svg icon_white.png +rsvg -h 33 -w 33 WhiteAdvisor.svg WhiteAdvisor.png +rsvg -h 33 -w 33 WhiteArchbishop.svg WhiteArchbishop.png +rsvg -h 33 -w 33 WhiteBishop.svg WhiteBishop.png +rsvg -h 33 -w 33 WhiteCanon.svg WhiteCanon.png +rsvg -h 33 -w 33 WhiteChancellor.svg WhiteChancellor.png +rsvg -h 33 -w 33 WhiteClaw.svg WhiteClaw.png +rsvg -h 33 -w 33 WhiteCobra.svg WhiteCobra.png +rsvg -h 33 -w 33 WhiteCommoner.svg WhiteCommoner.png +rsvg -h 33 -w 33 WhiteCrownedBishop.svg WhiteCrownedBishop.png +rsvg -h 33 -w 33 WhiteCrownedRook.svg WhiteCrownedRook.png +rsvg -h 33 -w 33 WhiteDolphin.svg WhiteDolphin.png +rsvg -h 33 -w 33 WhiteElephant.svg WhiteElephant.png +rsvg -h 33 -w 33 WhiteGoldKnight.svg WhiteGoldKnight.png +rsvg -h 33 -w 33 WhiteGoldLance.svg WhiteGoldLance.png +rsvg -h 33 -w 33 WhiteGoldPawn.svg WhiteGoldPawn.png +rsvg -h 33 -w 33 WhiteGoldSilver.svg WhiteGoldSilver.png +rsvg -h 33 -w 33 WhiteGold.svg WhiteGold.png +rsvg -h 33 -w 33 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WhiteRook.svg WhiteRook.png +rsvg -h 33 -w 33 WhiteSword.svg WhiteSword.png +rsvg -h 33 -w 33 WhiteUnicorn.svg WhiteUnicorn.png +rsvg -h 33 -w 33 WhiteWhale.svg WhiteWhale.png diff --git a/whats_new/rules/sym/open.png b/whats_new/rules/sym/open.png new file mode 100644 index 0000000..0d95440 Binary files /dev/null and b/whats_new/rules/sym/open.png differ diff --git a/whats_new/rules/sym/orange.png b/whats_new/rules/sym/orange.png new file mode 100644 index 0000000..2334310 Binary files /dev/null and b/whats_new/rules/sym/orange.png differ diff --git a/whats_new/rules/sym/red.png b/whats_new/rules/sym/red.png new file mode 100644 index 0000000..535d9af Binary files /dev/null and b/whats_new/rules/sym/red.png differ diff --git a/whats_new/rules/sym/yellow.png b/whats_new/rules/sym/yellow.png new file mode 100644 index 0000000..37fff52 Binary files /dev/null and b/whats_new/rules/sym/yellow.png differ diff --git a/whats_new/rules/template.html b/whats_new/rules/template.html new file mode 100644 index 0000000..a143d4c --- /dev/null +++ b/whats_new/rules/template.html @@ -0,0 +1,164 @@ + +
+Gothic Chess +
+ +
Gothic Chess
+
+ + +
Initial setup
+
+f1, f8: King +
+d1, d8: Queen +
+e1, e8: Chancellor +
+g1, g8: Archbishop +
+a1, a8, j1, j8: Rook +
+c1, c8, h1, h8: Bishop +
+b1, b8, i1, i8: Knight +
+a2-j2, a8-j8: Pawns +
+
+
+Piece + +ID + +value + +Moves (Betza notation) + +Remarks +
+King + +K + +- + +WF + +Can castle with Rook, moving 2 steps towards it +
+Queen + +Q + +9.5 + +WWFF + + +
+Chancellor + +C + +9 + +WWFF + + +
+ArchBishop + +A + +8.75 + +WWFF + + +
+Rook + +R + +5 + +WW + + +
+Bishop + +B + +3.5 + +FF + +Color-bound +
+Knight + +N + +3 + + + +N +
+Pawn + +P + +1 + +mfWcfF + +Promotes to Q, R, B, or N on reaching last rank +
+
Pawn peculiarities
+
+
Pawns capture differently from how they move (straight move, diagonal capture).
+
Pawns can move two squares ahead from their initial position, provided they are not blocked.
+
On the move immediately after such a double push, they can be captured en passant by another Pawn, +as if they had only moved 1 square ahead.
+
Pawns promote to another (non-royal) piece of choice when they reach last rank.
+
+
Castling
+
+A King that has not moved before can move two squares in the direction of a Rook that has not moved before, +in which case that Rook is moved to the square the King skipped over. +This is only allowed when the King is not in check, on the square it came from and would not be in check on the square it skipped over. +
+
General rules
+
+
It is not allowed to expose your King to check.
+
The game is won by checkmating the opponent's King.
+
Stalemate (no legal moves, but not in check) is a draw.
+
+
Differences with FIDE
+
+None. +
+
Strategy issues
+
+It is not possible to force checkmate on a bare King with just a single Bishop or Knight (in addition to your own King). +
+
+Bishops are confined to squares of a single color. +Having Bishops on both colors compensates this weakness, and is worth an extra 0.5 on top of their added value. +
+
+As Chancellor and Queen are nearly equal in value to Queen, under-promotion is very common. +
+
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