X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=whats_new%2Frules%2FSeirawan.html;h=5575c002802031f463dc4ad54217e6cb71f8b541;hb=111cb5deba58e6ca98ca540bd1ccfcb6cce6a177;hp=976751c33e794996ce67c0d91798a2e421fb3d14;hpb=be72e93f24deb4914ca08c698b6c0b536c2961ee;p=xboard.git
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-
-
-
- Pieces available for gating will be displayed beside the board - |
-Initial setup-
-e1, e8: King
- |
+
- Click on a piece below to see its moves +Pieces available for gating will be displayed beside + the board + |
-
+ |
+ Initial setup- | - - |
+ e1, e8: King |
+
Click on a piece below to see its moves
-- | + | - | - - | + | - | - - |
- Sliding capture or non-capture, | |||||||||||||
+ | - | + | - | + | - | + | - | + | - | + | - | + | - | + | - | + |
+ Sliding capture or non-capture, |
+ + | ||
- | ||||||||||||||||||||
+ | - | + | - | + | - | + | - | + | - | + | - | + | - | + | - | + | + | + | ||
- | - - | -Unblockable leap (capture or non-capture) - | ||||||||||||||||||
+ | - | + | - | + | - | + | - | + | - | - - | + | - | + | - | + | - | + | - | - - | -Non-capture only - |
+ | - | + | Unblockable leap (capture or non-capture) | ++ | ||||||||||||||||
- | + | - | + | - | + | - | + | - | + | - | + | - | + | - | - - | -Capture only - | ||||
+ | - | + | - | + | - | + | 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 - |
-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. -
--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!) -
--The Elephant and Hawk pieces are extra, and enter the board by gating. -
--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 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. -
--
--
+:
+ :
+ :
+ :
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 | +
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.
+ +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!)
+ +The Elephant and Hawk pieces are extra, and enter the board by + gating.
+ +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 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.
+ +