p.boxed
- | The capture of an enemy piece produces a new "checkered" piece belonging
- | to both players.
+ | The capture of an enemy piece produces a new "checkered" piece belonging
+ | to both players.
figure.showPieces.text-center
- img(src="/images/pieces/Checkered/cp.svg")
- img(src="/images/pieces/Checkered/cr.svg")
- img(src="/images/pieces/Checkered/cn.svg")
- img(src="/images/pieces/Checkered/cb.svg")
- img(src="/images/pieces/Checkered/cq.svg")
- figcaption Checkered pieces, born after captures.
+ img(src="/images/pieces/Checkered/cp.svg")
+ img(src="/images/pieces/Checkered/cr.svg")
+ img(src="/images/pieces/Checkered/cn.svg")
+ img(src="/images/pieces/Checkered/cb.svg")
+ img(src="/images/pieces/Checkered/cq.svg")
+ figcaption Checkered pieces, born after captures.
p Note: the initial French name for this variant is "l'Échiqueté".
-h3 Specifications
-
-ul
- li Chessboard: standard.
- li Material: additional checkered pieces.
- li Non-capturing moves: standard; see below.
- li Special moves: standard; see below.
- li Captures: standard; see below.
- li End of game: standard.
-
p The game potentially evolves in two stages.
h2.stageDelimiter Stage 1
h3 Basics
ol
- li
- | Each capture produces a new piece, taking on nature of
- | the capturing or captured one.
- li
- | The new piece arising from a capture has a new color:
- | "checkered", as illustrated above.
- li
- | All checkered pieces belong to the player in turn and can
- | capture the opponents pieces.
+ li
+ | Each capture produces a new piece, taking on nature of
+ | the capturing or captured one.
+ li
+ | The new piece arising from a capture has a new color:
+ | "checkered", as illustrated above.
+ li
+ | All checkered pieces belong to the player in turn and can
+ | capture the opponents pieces.
p Remarks:
ul
- li.
- A non-capturing checkered move cannot be "undone" right after since
- this would repeat the same position.
- li Checkered pieces cannot be captured.
+ li.
+ A non-capturing checkered move cannot be "undone" right after since
+ this would repeat the same position.
+ li Checkered pieces cannot be captured.
figure.diagram-container
- .diagram
- | fen:2kr4/pp6/2p5/4ss1r/1P2ns1P/2Np4/P1P1P1BP/R2o1RK1:
- figcaption.
- Black plays Rxh4=P. (Checkered pawn to) h5 is allowed then,
- because piece's nature changed.
+ .diagram
+ | fen:2kr4/pp6/2p5/4ss1r/1P2ns1P/2Np4/P1P1P1BP/R2o1RK1:
+ figcaption.
+ Black plays Rxh4=P. (Checkered pawn to) h5 is allowed then,
+ because piece's nature changed.
-h3 Pions
+h3 Pawns
ul
- li.
- Pawns can jump two squares only from their initial rank, and only once in the game:
- a checkered pawn returning on the pawns' start rank cannot jump. However:
- li.
- A pawn captured on its starting square (thus becoming "checkered") keeps the
- right to advance two squares.
- li.
- Checkered pawns cannot capture en passant, because while the pawn was "passing"
- they were of the same color.
+ li.
+ Pawns can jump two squares only from their initial rank, and only once in the game:
+ a checkered pawn returning on the pawns' start rank cannot jump. However:
+ li.
+ A pawn captured on its starting square (thus becoming "checkered") keeps the
+ right to advance two squares.
+ li.
+ Checkered pawns cannot capture en passant, because while the pawn was "passing"
+ they were of the same color.
p.bold.bigfont If you wanna play, you can stop reading here.
h3 Stalemate or checkmate?
p.
- The following diagram seems to show a mating pattern, but the king if
- "attacked" by a checkered pawn – which still belongs to white.
- Therefore, it can be considered that it's not really a check because
- white is unable to "give back the turn".
- Without the black bishop on a7 it would be mate (without debate), because
- the king could virtually go to g1 before being captured by the pawn-chamaleon.
+ The following diagram seems to show a mating pattern, but the king if
+ "attacked" by a checkered pawn – which still belongs to white.
+ Therefore, it can be considered that it's not really a check because
+ white is unable to "give back the turn".
+ Without the black bishop on a7 it would be mate (without debate), because
+ the king could virtually go to g1 before being captured by the pawn-chamaleon.
figure.diagram-container
- .diagram
- | fen:7k/b5pp/8/8/8/8/6ss/7K:
- figcaption After 1...g2+(#?)
+ .diagram
+ | fen:7k/b5pp/8/8/8/8/6ss/7K:
+ figcaption After 1...g2+(#?)
p.
- The interface considers that it's mate in both cases, following the idea
- "it's checkmate if we cannot move, and the opponent on its turn could
- take the king" (maybe after an impossible move).
+ The interface considers that it's mate in both cases, following the idea
+ "it's checkmate if we cannot move, and the opponent on its turn could
+ take the king" (maybe after an impossible move).
h2.stageDelimiter Stage 2
p.warn This stage is not (and probably will never be) implemented.
p.
- During the game one of the two players can decide to take control of the
- checkered pieces.
- They thus become autonomous and vulnerable to being captured - stage 2 begins.
- The other player is in charge of both the white and black pieces, and tries to
- eliminate checkered pieces.
- The checkered side wins by checkmating either the white or black king.
+ During the game one of the two players can decide to take control of the
+ checkered pieces.
+ They thus become autonomous and vulnerable to being captured - stage 2 begins.
+ The other player is in charge of both the white and black pieces, and tries to
+ eliminate checkered pieces.
+ The checkered side wins by checkmating either the white or black king.
h4 Variant of stage 2
p.
- An observer could decide to join the game by taking the checkered pieces
- at any moment.
- It then becomes a chess game with three players, with some subtelties to be resolved.
- It was tested in some (real life) games organised by the variant creator.
+ An observer could decide to join the game by taking the checkered pieces
+ at any moment.
+ It then becomes a chess game with three players, with some subtelties to be resolved.
+ It was tested in some (real life) games organised by the variant creator.
h3 Special moves
p Checkered pawns can...
ul
- li move and capture in either direction;
- li take en passant,
- li be promoted on either the first or eighth row.
+ li move and capture in either direction;
+ li take en passant,
+ li be promoted on either the first or eighth row.
h3 Credits
ul
- li.
- The rules of Checkered Chess were thought up by Patrick Bernier and developed
- with the help of Benjamin Auder.
- li.
- Thanks also to Olive Martin, Christian Poisson, Bevis Martin, Laurent Nouhaud
- and Frédéric Fradet.
+ li.
+ The rules of Checkered Chess were thought up by Patrick Bernier and developed
+ with the help of Benjamin Auder.
+ li.
+ Thanks also to Olive Martin, Christian Poisson, Bevis Martin, Laurent Nouhaud
+ and Frédéric Fradet.
projects / vchess.git / blobdiff