client/src/translations/rules/Synchrone1/en.pug

   1 p.boxed
   2   | Both players play a move "at the same time".
   3   | Conflicts are resolved following a few simple rules.
   4
   5 p.
   6   In order to not rethink a big part of the code, the white move has to be
   7   played before the black one. However, the black player doesn't see it.
   8
   9 p So both players play "at the same time". Resolving rules:
  10 ul
  11   li.
  12     If both moves arrive on the same square, both pieces disappear except
  13     if one is a king. In this case only the king remains.
  14   li.
  15     If a capture was intended but the target moved, the move is still played
  16     but doesn't capture anything.
  17 p.
  18   Such captures can be anticipated by capturing our own pieces.
  19   If the enemy captures as predicted, his piece disappears.
  20   If he doesn't, the self-capture isn't undone.
  21
  22 figure.diagram-container
  23   .diagram
  24     | fen:rnb1kbnr/ppp1pppp/8/3qP3/8/8/PPPP1PPP/RNBQKBNR:
  25   figcaption After 1.e4 d5 2.e5 Qxd5 (anticipating 2.exd5 which isn't played)
  26
  27 p.
  28   When the king is under check, a legal orthodox move must be played.
  29   Some weird situations would occur otherwise, like on the following diagram.
  30   If we allow self-(re)captures then the king would take on h2 and escape to
  31   the third rank.
  32
  33 figure.diagram-container
  34   .diagram
  35     | fen:7k/8/8/3QR3/3P4/4P3/r6P/q6K:
  36   figcaption 1.Kxh2 by anticipation isn't allowed: white is checkmated.
  37
  38 h3 End of the game
  39
  40 p.
  41   Due to the simultaneity, it is possible that a king is captured for example
  42   after escaping a check in a wrong way, as the following diagram shows.
  43   So, capturing the king counts as a win, of highest priority.
  44   A checkmate wins too, but if your king is captured and the other still on
  45   the board (even if it is mated), you lose.
  46
  47 figure.diagram-container
  48   .diagram.diag12
  49     | fen:r3r1bb/ppqRkppp/8/2p1n3/7n/8/PPPPP1P1/RNBQNBK1:
  50   .diagram.diag22
  51     | fen:r3r1bb/pp1qRppp/8/2p1n3/7n/8/PPPPP1P1/RNBQNBK1:
  52   figcaption.
  53     Left: before Rxe7 (white) and Qxd7 (black)
  54     Right: after the move (1-0)
  55
  56 h3 Source
  57
  58 p
  59   a(href="http://www.hexenspiel.de/engl/synchronous-chess/") Synchronous chess
  60   | , modified to allow en-passant captures
  61   | and disable the "exchange of captures" stage.
  62   a(href="http://www.pion.ch/echecs/variante.php?jeu=synchro")
  63     | Another description
  64   | .