X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=whats_new%2Frules%2FGrand.html;h=fdf346c2e6dfe1e0b681624180f319482dc1da80;hb=d783e0c4dab936f6f07cc2cf38d97c617d6c3488;hp=bb31849d7955e72b3e6b391ce0a2dc363068bd02;hpb=4d5a9416969353d11450b39b3b1403405098472a;p=xboard.git
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- Captured pieces will be displayed beside the board for promotion choice - |
-Initial setup-
-e1, e8: King
- |
Click on a piece below to see its moves
+
+
-
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+ Moves at a Glance- |
+ Click on a piece below to see its moves - |
+
:
Pawn peculiarities-
General rules-
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--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 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. - -- -- -- + | + + | + + | + + | + + | + | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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+ + | + + | + + | + + | + + | + + | + + | + + | + + | + |
:
+ :
+ :
+ :
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 | +
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.
+ +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.
+ +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 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.
+ +