views/rules/Checkered/en.pug

   1 p.boxed
   2     | The capture of an enemy piece produces a new "checkered" piece belonging
   3     | to both players.
   4
   5 figure.showPieces.center-align
   6     img(src="/images/tmp_checkered/cp.png")
   7     img(src="/images/tmp_checkered/cr.png")
   8     img(src="/images/tmp_checkered/cn.png")
   9     img(src="/images/tmp_checkered/cb.png")
  10     img(src="/images/tmp_checkered/cq.png")
  11     img(src="/images/tmp_checkered/no_ck.png")
  12     figcaption Checkered pieces, born after captures.
  13
  14 p Note: the initial French name for this variant is "l'Échiqueté".
  15
  16 h3 Specifications
  17
  18 ul
  19     li Chessboard: standard.
  20     li Material: additional checkered pieces.
  21     li Non-capturing moves: standard; see below.
  22     li Special moves: standard; see below.
  23     li Captures: standard; see below.
  24     li End of game: standard.
  25
  26 p The game potentially evolves in two stages.
  27
  28 h2.stageDelimiter Stage 1
  29
  30 h3 Basics
  31
  32 ol
  33     li
  34         | Each capture produces a new piece, taking on nature of
  35         | the capturing or captured one.
  36     li
  37         | The new piece arising from a capture has a new color:
  38         | "checkered", as illustrated above.
  39     li
  40         | All checkered pieces belong to the player in turn and can
  41         | capture the opponents pieces.
  42
  43 p Remarks:
  44 ul
  45     li.
  46         A non-capturing checkered move cannot be "undone" right after since
  47         this would repeat the same position.
  48     li Checkered pieces cannot be captured.
  49
  50 figure.diagram-container
  51     .diagram
  52         | fen:2kr4/pp6/2p5/4ss1r/1P2ns1P/2Np4/P1P1P1BP/R2o1RK1:
  53     figcaption.
  54         Black plays Rxh4=P. (Checkered pawn to) h5 is allowed then,
  55         because piece's nature changed.
  56
  57 h3 Pions
  58
  59 ul
  60     li.
  61         Pawns can jump two squares only from their initial rank, and only once in the game:
  62         a checkered pawn returning on the pawns' start rank cannot jump. However:
  63     li.
  64         A pawn captured on its starting square (thus becoming "checkered") keeps the
  65         right to advance two squares.
  66     li.
  67         Checkered pawns cannot capture en passant, because while the pawn was "passing"
  68         they were of the same color.
  69
  70 p.bold.bigfont If you wanna play, you can stop reading here.
  71
  72 h3 Stalemate or checkmate?
  73
  74 p.
  75     The following diagram seems to show a mating pattern, but the king if
  76     "attacked" by a checkered pawn &ndash; which still belongs to white.
  77     Therefore, it can be considered that it's not really a check because
  78     white is unable to "give back the turn".
  79     Without the black bishop on a7 it would be mate (without debate), because
  80     the king could virtually go to g1 before being captured by the pawn-chamaleon.
  81
  82 figure.diagram-container
  83     .diagram
  84         | fen:7k/b5pp/8/8/8/8/6ss/7K:
  85     figcaption After 1...g2+(#?)
  86
  87 p.
  88     The interface considers that it's mate in both cases, following the idea
  89     "it's checkmate if we cannot move, and the opponent on its turn could
  90     take the king" (maybe after an impossible move).
  91
  92 h2.stageDelimiter Stage 2
  93
  94 p.warn This stage is not (and probably will never be) implemented.
  95
  96 p.
  97     During the game one of the two players can decide to take control of the
  98     checkered pieces.
  99     They thus become autonomous and vulnerable to being captured - stage 2 begins.
 100     The other player is in charge of both the white and black pieces, and tries to
 101     eliminate checkered pieces.
 102     The checkered side wins by checkmating either the white or black king.
 103
 104 h4 Variant of stage 2
 105 p.
 106     An observer could decide to join the game by taking the checkered pieces
 107     at any moment.
 108     It then becomes a chess game with three players, with some subtelties to be resolved.
 109     It was tested in some (real life) games organised by the variant creator.
 110
 111 h3 Special moves
 112
 113 p Checkered pawns can...
 114 ul
 115     li move and capture in either direction;
 116     li take en passant,
 117     li be promoted on either the first or eighth row.
 118
 119 h3 Credits
 120
 121 ul
 122     li.
 123         The rules of Checkered Chess were thought up by Patrick Bernier and developed
 124         with the help of Benjamin Auder.
 125     li.
 126         Thanks also to Olive Martin, Christian Poisson, Bevis Martin, Laurent Nouhaud
 127         and Frédéric Fradet.