-<html>
-<header>
-<title>Chu Chess</title>
-<link rel=StyleSheet href="./moves.css" type="text/css">
-<script type="text/javascript" src="chu.js"></script>
-</header>
-<body>
-<h1>Chu Chess</h1>
-<p>
-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.
-</p>
-<table cellpadding="20"><tr><td>
-<img src="ChuChess.png">
-</td><td>
-<h3>Initial setup</h3>
-<p>
-f0, e9: King
-<br>
-e1, f8: Lion
-<br>
-f1, e8: Queen
-<br>
-g1, d8: Crowned Rook
-<br>
-d1, g8: Crowned Bishop
-<br>
-a0, a9, j0, j9: Rook
-<br>
-c1, c8, h1, h8: Bishop
-<br>
-b1, b8, i1, i8: Knight
-<br>
-a1, a8, j1, j8: Commoner
-<br>
-a2-j2, a7-j7: Pawns
-</p>
-</td></tr></table>
+<!--#include virtual="/server/html5-header.html" -->
+ <title>Chu Chess</title>
+ <link rel="StyleSheet" href="./moves.css" type="text/css">
+ <script type="text/javascript" src="chu.js">
+</script>
+<!--#include virtual="/server/banner.html" -->
+<!--#set var="article_name" value="/server/standards/boilerplate" -->
+<!--#include virtual="/server/gnun/initial-translations-list.html" -->
-<h3>Moves at a Glance</h3>
+ <h1>Chu Chess</h1>
-<p>Click on a piece below to see its moves</p>
+ <p>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.</p>
-<table class="board"><tr><td class="n" id="0x9" onmouseDown="down_click(0,-9)" onmouseUp="up_click()">
-<img src="sym/BlackRook.png">
- </td><td class="n" id="1x9">
+ <table cellpadding="20">
+ <tr>
+ <td><img src="ChuChess.png"></td>
- </td><td class="n" id="2x9">
+ <td>
+ <h3>Initial setup</h3>
- </td><td class="n" id="3x9">
+ <p>f0, e9: King<br>
+ e1, f8: Lion<br>
+ f1, e8: Queen<br>
+ g1, d8: Crowned Rook<br>
+ d1, g8: Crowned Bishop<br>
+ a0, a9, j0, j9: Rook<br>
+ c1, c8, h1, h8: Bishop<br>
+ b1, b8, i1, i8: Knight<br>
+ a1, a8, j1, j8: Commoner<br>
+ a2-j2, a7-j7: Pawns</p>
+ </td>
+ </tr>
+ </table>
- </td><td class="n" id="4x9" onmouseDown="down_click(4,-9)" onmouseUp="up_click()">
-<img src="sym/BlackKing.png">
- </td><td class="n" id="5x9">
+ <h3>Moves at a Glance</h3>
- </td><td class="n" id="6x9">
+ <p>Click on a piece below to see its moves</p>
- </td><td class="n" id="7x9">
+ <table class="board">
+ <tr>
+ <td class="n" id="sq0x9" onmousedown="down_click(0,-9)"
+ onmouseup="up_click()"><img src="sym/BlackRook.png"></td>
- </td><td class="n" id="8x9">
+ <td class="n" id="sq1x9"></td>
- </td><td class="n" id="9x9" onmouseDown="down_click(9,-9)" onmouseUp="up_click()">
-<img src="sym/BlackRook.png">
- </td><td class="h">
-<img src="sym/yellow.png">
- </td><td class="w" rowspan="2" valign="top">
-<p>Sliding capture or non-capture,<br>can be blocked on any square along the ray</p>
-</td></tr><tr><td class="n" id="0x8">
+ <td class="n" id="sq2x9"></td>
- </td><td class="n" id="1x8">
+ <td class="n" id="sq3x9"></td>
- </td><td class="n" id="2x8">
+ <td class="n" id="sq4x9" onmousedown="down_click(4,-9)"
+ onmouseup="up_click()"><img src="sym/BlackKing.png"></td>
- </td><td class="n" id="3x8">
+ <td class="n" id="sq5x9"></td>
- </td><td class="n" id="4x8">
+ <td class="n" id="sq6x9"></td>
- </td><td class="n" id="5x8">
+ <td class="n" id="sq7x9"></td>
- </td><td class="n" id="6x8">
+ <td class="n" id="sq8x9"></td>
- </td><td class="n" id="7x8">
+ <td class="n" id="sq9x9" onmousedown="down_click(9,-9)"
+ onmouseup="up_click()"><img src="sym/BlackRook.png"></td>
- </td><td class="n" id="8x8">
+ <td class="h"><img src="sym/yellow.png"></td>
- </td><td class="n" id="9x8">
+ <td class="w" rowspan="2" valign="top">
+ <p>Sliding capture or non-capture,<br>
+ can be blocked on any square along the ray</p>
+ </td>
+ </tr>
-</td></tr><tr><td class="n" id="0x7">
+ <tr>
+ <td class="n" id="sq0x8"></td>
- </td><td class="n" id="1x7">
+ <td class="n" id="sq1x8"></td>
- </td><td class="n" id="2x7">
+ <td class="n" id="sq2x8"></td>
- </td><td class="n" id="3x7">
+ <td class="n" id="sq3x8"></td>
- </td><td class="n" id="4x7">
+ <td class="n" id="sq4x8"></td>
- </td><td class="n" id="5x7">
+ <td class="n" id="sq5x8"></td>
- </td><td class="n" id="6x7" onmouseDown="down_click(6,7)" onmouseUp="up_click()">
-<img src="sym/WhiteCommoner.png">
- </td><td class="n" id="7x7">
+ <td class="n" id="sq6x8"></td>
- </td><td class="n" id="8x7">
+ <td class="n" id="sq7x8"></td>
- </td><td class="n" id="9x7">
+ <td class="n" id="sq8x8"></td>
- </td><td class="h">
-<img src="sym/orange.png">
- </td><td class="w">
-Unblockable leap (capture or non-capture)
-</td></tr><tr><td class="n" id="0x6">
+ <td class="n" id="sq9x8"></td>
+ </tr>
- </td><td class="n" id="1x6">
+ <tr>
+ <td class="n" id="sq0x7"></td>
- </td><td class="n" id="2x6">
+ <td class="n" id="sq1x7"></td>
- </td><td class="n" id="3x6">
+ <td class="n" id="sq2x7"></td>
- </td><td class="n" id="4x6">
+ <td class="n" id="sq3x7"></td>
- </td><td class="n" id="5x6">
+ <td class="n" id="sq4x7"></td>
- </td><td class="n" id="6x6" onmouseDown="down_click(6,6)" onmouseUp="up_click()">
-<img src="sym/WhiteKing.png">
- </td><td class="n" id="7x6">
+ <td class="n" id="sq5x7"></td>
- </td><td class="n" id="8x6">
+ <td class="n" id="sq6x7" onmousedown="down_click(6,7)"
+ onmouseup="up_click()"><img src="sym/WhiteCommoner.png"></td>
- </td><td class="n" id="9x6">
+ <td class="n" id="sq7x7"></td>
- </td><td class="h">
-<img src="sym/green.png">
- </td><td class="w">
-Non-capture only
-</td></tr><tr><td class="n" id="0x5">
+ <td class="n" id="sq8x7"></td>
- </td><td class="n" id="1x5">
+ <td class="n" id="sq9x7"></td>
- </td><td class="n" id="2x5">
+ <td class="h"><img src="sym/orange.png"></td>
- </td><td class="n" id="3x5">
+ <td class="w">Unblockable leap (capture or non-capture)</td>
+ </tr>
- </td><td class="n" id="4x5">
+ <tr>
+ <td class="n" id="sq0x6"></td>
- </td><td class="n" id="5x5">
+ <td class="n" id="sq1x6"></td>
- </td><td class="n" id="6x5" onmouseDown="down_click(6,5)" onmouseUp="up_click()">
-<img src="sym/WhiteCrownedRook.png">
- </td><td class="n" id="7x5" onmouseDown="down_click(7,5)" onmouseUp="up_click()">
-<img src="sym/WhiteRook.png">
- </td><td class="n" id="8x5">
+ <td class="n" id="sq2x6"></td>
- </td><td class="n" id="9x5">
+ <td class="n" id="sq3x6"></td>
- </td><td class="h">
-<img src="sym/red.png">
- </td><td class="w">
-Capture only
-</td></tr><tr><td class="n" id="0x4">
+ <td class="n" id="sq4x6"></td>
- </td><td class="n" id="1x4">
+ <td class="n" id="sq5x6"></td>
- </td><td class="n" id="2x4">
+ <td class="n" id="sq6x6" onmousedown="down_click(6,6)"
+ onmouseup="up_click()"><img src="sym/WhiteKing.png"></td>
- </td><td class="n" id="3x4">
+ <td class="n" id="sq7x6"></td>
- </td><td class="n" id="4x4" onmouseDown="down_click(4,4)" onmouseUp="up_click()">
-<img src="sym/WhiteLion.png">
- </td><td class="n" id="5x4" onmouseDown="down_click(5,4)" onmouseUp="up_click()">
-<img src="sym/WhiteQueen.png">
- </td><td class="n" id="6x4" onmouseDown="down_click(6,4)" onmouseUp="up_click()">
-<img src="sym/WhiteCrownedBishop.png">
- </td><td class="n" id="7x4" onmouseDown="down_click(7,4)" onmouseUp="up_click()">
-<img src="sym/WhiteBishop.png">
- </td><td class="n" id="8x4">
+ <td class="n" id="sq8x6"></td>
- </td><td class="n" id="9x4">
+ <td class="n" id="sq9x6"></td>
- </td><td class="h">
-<img src="sym/cyan.png">
- </td><td class="w" rowspan="2" valign="top">
-Captured while passing through the square to another destination
-</td></tr><tr><td class="n" id="0x3">
+ <td class="h"><img src="sym/green.png"></td>
- </td><td class="n" id="1x3">
-<img src="sym/BlackPawn.png">
- </td><td class="n" id="2x3">
+ <td class="w">Non-capture only</td>
+ </tr>
- </td><td class="n" id="3x3">
+ <tr>
+ <td class="n" id="sq0x5"></td>
- </td><td class="n" id="4x3" onmouseDown="down_click(4,-3)" onmouseUp="up_click()">
-<img src="sym/WhiteKnight.png">
- </td><td class="n" id="5x3">
+ <td class="n" id="sq1x5"></td>
- </td><td class="n" id="6x3">
+ <td class="n" id="sq2x5"></td>
- </td><td class="n" id="7x3">
+ <td class="n" id="sq3x5"></td>
- </td><td class="n" id="8x3">
+ <td class="n" id="sq4x5"></td>
- </td><td class="n" id="9x3">
+ <td class="n" id="sq5x5"></td>
-</td></tr><tr><td class="n" id="0x2">
+ <td class="n" id="sq6x5" onmousedown="down_click(6,5)"
+ onmouseup="up_click()"><img src=
+ "sym/WhiteCrownedRook.png"></td>
- </td><td class="n" id="1x2">
+ <td class="n" id="sq7x5" onmousedown="down_click(7,5)"
+ onmouseup="up_click()"><img src="sym/WhiteRook.png"></td>
- </td><td class="n" id="2x2">
+ <td class="n" id="sq8x5"></td>
- </td><td class="n" id="3x2">
+ <td class="n" id="sq9x5"></td>
- </td><td class="n" id="4x2">
+ <td class="h"><img src="sym/red.png"></td>
- </td><td class="n" id="5x2">
+ <td class="w">Capture only</td>
+ </tr>
- </td><td class="n" id="6x2">
+ <tr>
+ <td class="n" id="sq0x4"></td>
- </td><td class="n" id="7x2" onmouseDown="down_click(7,2)" onmouseUp="up_click()">
-<img src="sym/WhitePawn.png">
- </td><td class="n" id="8x2">
+ <td class="n" id="sq1x4"></td>
- </td><td class="n" id="9x2">
+ <td class="n" id="sq2x4"></td>
-</td></tr><tr><td class="n" id="0x1">
+ <td class="n" id="sq3x4"></td>
- </td><td class="n" id="1x1">
+ <td class="n" id="sq4x4" onmousedown="down_click(4,4)"
+ onmouseup="up_click()"><img src="sym/WhiteLion.png"></td>
- </td><td class="n" id="2x1" onmouseDown="down_click(2,1)" onmouseUp="up_click()">
-<img src="sym/WhitePawn.png">
- </td><td class="n" id="3x1">
+ <td class="n" id="sq5x4" onmousedown="down_click(5,4)"
+ onmouseup="up_click()"><img src="sym/WhiteQueen.png"></td>
- </td><td class="n" id="4x1">
+ <td class="n" id="sq6x4" onmousedown="down_click(6,4)"
+ onmouseup="up_click()"><img src=
+ "sym/WhiteCrownedBishop.png"></td>
- </td><td class="n" id="5x1">
+ <td class="n" id="sq7x4" onmousedown="down_click(7,4)"
+ onmouseup="up_click()"><img src="sym/WhiteBishop.png"></td>
- </td><td class="n" id="6x1">
+ <td class="n" id="sq8x4"></td>
- </td><td class="n" id="7x1">
+ <td class="n" id="sq9x4"></td>
- </td><td class="n" id="8x1">
+ <td class="h"><img src="sym/cyan.png"></td>
- </td><td class="n" id="9x1">
+ <td class="w" rowspan="2" valign="top">Captured while passing
+ through the square to another destination</td>
+ </tr>
-</td></tr><tr><td class="n" id="0x0">
+ <tr>
+ <td class="n" id="sq0x3"></td>
- </td><td class="n" id="1x0">
-
- </td><td class="n" id="2x0">
-
- </td><td class="n" id="3x0">
-
- </td><td class="n" id="4x0">
-
- </td><td class="n" id="5x0">
-
- </td><td class="n" id="6x0">
-
- </td><td class="n" id="7x0">
-
- </td><td class="n" id="8x0">
-
- </td><td class="n" id="9x0">
-
-</td></tr></table>
-
-<p id="piece" height="20">:<br>:<br>:<br>:</p>
-
-<table cellpadding="5" border="1"><tr><td>
-Piece
- </td><td>
-ID
- </td><td>
-value
- </td><td>
-Moves (<a href="Betza.html">Betza notation</a>)
- </td><td>
-Remarks
-</td></tr><tr><td>
-King
- </td><td>
-K
- </td><td>
--
- </td><td>
-K
- </td><td>
-Can castle with Rook, moving 3 steps towards it
-</td></tr><tr><td>
-Lion
- </td><td>
-L
- </td><td>
-15
- </td><td>
-KNAD(cK-aK)(K-bK)
- </td><td>
-Can make two independent King steps per turn (capturing upto two pieces)
-</td></tr><tr><td>
-Queen
- </td><td>
-Q
- </td><td>
-9.5
- </td><td>
-RB or Q
- </td><td>
-
-</td></tr><tr><td>
-Crowned Rook
- </td><td>
-+R
- </td><td>
-7
- </td><td>
-RF
- </td><td>
-aka Dragon Kin
-</td></tr><tr><td>
-Crowned Bishop
- </td><td>
-+B
- </td><td>
-5.25
- </td><td>
-BW
- </td><td>
-aka Dragon Horse
-</td></tr><tr><td>
-Rook
- </td><td>
-R
- </td><td>
-5
- </td><td>
-R
- </td><td>
-
-</td></tr><tr><td>
-Bishop
- </td><td>
-B
- </td><td>
-3.5
- </td><td>
-B
- </td><td>
-Color-bound
-</td></tr><tr><td>
-Knight
- </td><td>
-N
- </td><td>
-3
- </td><td>
-N
- </td><td>
-
-</td></tr><tr><td>
-Commoner
- </td><td>
-M
- </td><td>
-3
- </td><td>
-K
- </td><td>
-aka Man or Soldier
-</td></tr><tr><td>
-Pawn
- </td><td>
-P
- </td><td>
-1
- </td><td>
-mfWcfF
- </td><td>
-Promotes to Q, R, B, or N on reaching promotion zone
-</td></tr></table>
-<h3>Pawn peculiarities</h3>
-<ul>
-<li>Pawns capture differently from how they move (straight move, diagonal capture).</li>
-<li>Pawns can move two squares straight ahead from their initial position, provided they are not blocked.</li>
-<li>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.</li>
-<li>Pawns promote asthey promote in orthodox Chess piece of choice when they enter the promotion zone (in the Chess-like version).</li>
-</ul>
-<h3>Castling</h3>
-<p>
-A King that has not moved before can move <b>three</b> 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.
-</p>
-<h3>General rules</h3>
-<ul>
-<li>It is not allowed to expose your King to check.</li>
-<li>The game is won by checkmating the opponent's King.</li>
-<li>Stalemate (no legal moves, but not in check) is a draw.</li>
-<li>The promotion zone is three ranks deep.</li>
-<li>You cannot promote to Lion if you already have one.</li>
-</ul>
-<h3>Chess-like or Shogi-like promotion</h3>
-<p>
-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.
-</p>
-<h3>The Lion piece</h3>
-<p>
-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.
-</p>
-<p>
-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.
-</p>
-<h3>Restrictions on Lion capture</h3>
-<p>
-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 pseudo-legal (i.e. without taking account of check) recapture of the capturing Lion is possible
-<i>with another piece than King</i>.
-So even when the Lion is protected only with a pinned piece, the other Lion cannot capture it <i>from a distance</i>,
-just like a King could not capture it.
-</p><p>
-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.
-</p>
-<h3>XBoard interface issues</h3>
-<p>
-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.
-</p>
-<p>
-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.
-</p>
-<h3>Differences with FIDE</h3>
-<p>
-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.
-</p>
-<h3>Strategy issues</h3>
-<p>
-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.
-</p>
-<p>
-With a single Commoner you can force checkmate on a bare King.
-</p>
-<p>
-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.
-</p>
-<p>
-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).
-</p>
-<p>
-</p>
-<p>
-</p>
-<p>
-</p>
+ <td class="n" id="sq1x3"><img src="sym/BlackPawn.png"></td>
+
+ <td class="n" id="sq2x3"></td>
+
+ <td class="n" id="sq3x3"></td>
+
+ <td class="n" id="sq4x3" onmousedown="down_click(4,-3)"
+ onmouseup="up_click()"><img src="sym/WhiteKnight.png"></td>
+
+ <td class="n" id="sq5x3"></td>
+
+ <td class="n" id="sq6x3"></td>
+
+ <td class="n" id="sq7x3"></td>
+
+ <td class="n" id="sq8x3"></td>
+
+ <td class="n" id="sq9x3"></td>
+ </tr>
+
+ <tr>
+ <td class="n" id="sq0x2"></td>
+
+ <td class="n" id="sq1x2"></td>
+
+ <td class="n" id="sq2x2"></td>
+
+ <td class="n" id="sq3x2"></td>
+
+ <td class="n" id="sq4x2"></td>
+
+ <td class="n" id="sq5x2"></td>
+
+ <td class="n" id="sq6x2"></td>
+
+ <td class="n" id="sq7x2" onmousedown="down_click(7,2)"
+ onmouseup="up_click()"><img src="sym/WhitePawn.png"></td>
+
+ <td class="n" id="sq8x2"></td>
+
+ <td class="n" id="sq9x2"></td>
+ </tr>
+
+ <tr>
+ <td class="n" id="sq0x1"></td>
+
+ <td class="n" id="sq1x1"></td>
+
+ <td class="n" id="sq2x1" onmousedown="down_click(2,1)"
+ onmouseup="up_click()"><img src="sym/WhitePawn.png"></td>
+
+ <td class="n" id="sq3x1"></td>
+
+ <td class="n" id="sq4x1"></td>
+
+ <td class="n" id="sq5x1"></td>
+
+ <td class="n" id="sq6x1"></td>
+
+ <td class="n" id="sq7x1"></td>
+
+ <td class="n" id="sq8x1"></td>
+
+ <td class="n" id="sq9x1"></td>
+ </tr>
+
+ <tr>
+ <td class="n" id="sq0x0"></td>
+
+ <td class="n" id="sq1x0"></td>
+
+ <td class="n" id="sq2x0"></td>
+
+ <td class="n" id="sq3x0"></td>
+
+ <td class="n" id="sq4x0"></td>
+
+ <td class="n" id="sq5x0"></td>
+
+ <td class="n" id="sq6x0"></td>
+
+ <td class="n" id="sq7x0"></td>
+
+ <td class="n" id="sq8x0"></td>
+
+ <td class="n" id="sq9x0"></td>
+ </tr>
+ </table>
+
+ <p id="piece" height="20">:<br>
+ :<br>
+ :<br>
+ :</p>
+
+ <table cellpadding="5" border="1">
+ <tr>
+ <td>Piece</td>
+
+ <td>ID</td>
+
+ <td>value</td>
+
+ <td>Moves (<a href="Betza.html">Betza notation</a>)</td>
+
+ <td>Remarks</td>
+ </tr>
+
+ <tr>
+ <td>King</td>
+
+ <td>K</td>
+
+ <td>-</td>
+
+ <td>K</td>
+
+ <td>Can castle with Rook, moving 3 steps towards it</td>
+ </tr>
+
+ <tr>
+ <td>Lion</td>
+
+ <td>L</td>
+
+ <td>15</td>
+
+ <td>KNAD(cK-aK)(K-bK)</td>
+
+ <td>Can make two independent King steps per turn (capturing
+ upto two pieces)</td>
+ </tr>
+
+ <tr>
+ <td>Queen</td>
+
+ <td>Q</td>
+
+ <td>9.5</td>
+
+ <td>RB or Q</td>
+
+ <td></td>
+ </tr>
+
+ <tr>
+ <td>Crowned Rook</td>
+
+ <td>+R</td>
+
+ <td>7</td>
+
+ <td>RF</td>
+
+ <td>aka Dragon Kin</td>
+ </tr>
+
+ <tr>
+ <td>Crowned Bishop</td>
+
+ <td>+B</td>
+
+ <td>5.25</td>
+
+ <td>BW</td>
+
+ <td>aka Dragon Horse</td>
+ </tr>
+
+ <tr>
+ <td>Rook</td>
+
+ <td>R</td>
+
+ <td>5</td>
+
+ <td>R</td>
+
+ <td></td>
+ </tr>
+
+ <tr>
+ <td>Bishop</td>
+
+ <td>B</td>
+
+ <td>3.5</td>
+
+ <td>B</td>
+
+ <td>Color-bound</td>
+ </tr>
+
+ <tr>
+ <td>Knight</td>
+
+ <td>N</td>
+
+ <td>3</td>
+
+ <td>N</td>
+
+ <td></td>
+ </tr>
+
+ <tr>
+ <td>Commoner</td>
+
+ <td>M</td>
+
+ <td>3</td>
+
+ <td>K</td>
+
+ <td>aka Man or Soldier</td>
+ </tr>
+
+ <tr>
+ <td>Pawn</td>
+
+ <td>P</td>
+
+ <td>1</td>
+
+ <td>mfWcfF</td>
+
+ <td>Promotes to Q, R, B, or N on reaching promotion zone</td>
+ </tr>
+ </table>
+
+ <h3>Pawn peculiarities</h3>
+
+ <ul>
+ <li>Pawns capture differently from how they move (straight
+ move, diagonal capture).</li>
+
+ <li>Pawns can move two squares straight ahead from their
+ initial position, provided they are not blocked.</li>
+
+ <li>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.</li>
+
+ <li>Pawns promote asthey promote in orthodox Chess piece of
+ choice when they enter the promotion zone (in the Chess-like
+ version).</li>
+ </ul>
+
+ <h3>Castling</h3>
+
+ <p>A King that has not moved before can move <b>three</b> 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.</p>
+
+ <h3>General rules</h3>
+
+ <ul>
+ <li>It is not allowed to expose your King to check.</li>
+
+ <li>The game is won by checkmating the opponent's King.</li>
+
+ <li>Stalemate (no legal moves, but not in check) is a
+ draw.</li>
+
+ <li>The promotion zone is three ranks deep.</li>
+
+ <li>You cannot promote to Lion if you already have one.</li>
+ </ul>
+
+ <h3>Chess-like or Shogi-like promotion</h3>
+
+ <p>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.</p>
+
+ <h3>The Lion piece</h3>
+
+ <p>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.</p>
+
+ <p>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.</p>
+
+ <h3>Restrictions on Lion capture</h3>
+
+ <p>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 pseudo-legal (i.e. without taking account of check)
+ recapture of the capturing Lion is possible <i>with another piece
+ than King</i>. So even when the Lion is protected only with a
+ pinned piece, the other Lion cannot capture it <i>from a
+ distance</i>, just like a King could not capture it.</p>
+
+ <p>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.</p>
+
+ <h3>XBoard interface issues</h3>
+
+ <p>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.</p>
+
+ <p>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.</p>
+
+ <h3>Differences with FIDE</h3>
+
+ <p>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.</p>
+
+ <h3>Strategy issues</h3>
+
+ <p>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.</p>
+
+ <p>With a single Commoner you can force checkmate on a bare
+ King.</p>
+
+ <p>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.</p>
+
+ <p>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).</p>
+</div><!-- for id="content", starts in the include above -->
+<!--#include virtual="/server/footer.html" -->
</body>
</html>
projects / xboard.git / blobdiff