client/src/translations/rules/Chess960/en.pug

   1 p.boxed
   2   | Orthodox rules with shuffled starting position.
   3
   4 p.
   5   Chess is played between two players, one moving the white pieces and the
   6   other the black pieces. A "move" consists of a piece's movement on the board.
   7   White and black moves alternate until a specific situation occurs (checkmate,
   8   stalemate, or draw criteria met; this is detailed later).
   9   White pieces' player always make the first move.
  10
  11 p.
  12   Each piece has a particular way to move, but almost always captures by moving
  13   to an occupied square (with only one exception, detailed later).
  14
  15 figure.diagram-container
  16   .diagram
  17     | fen:rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR:
  18   figcaption Standard initial position.
  19
  20 p.
  21   Board coordinates: squares are identified by a couple (letter, number).
  22   The letter starts from 'a' and indicates the column, while the number starts
  23   at 1 and indicates the row.
  24   Since the chessboard is 64 squares, 8x8, this results in a coordinates system
  25   from a1 to h8. 'a1' is the bottom left corner square from the white pieces
  26   player perspective, while 'h8' is in the upper right corner.
  27
  28 h3 Regular moves
  29
  30 h4 Pawns
  31
  32 p.
  33   They are the weakest units on board, but the most complex to move.
  34   From their initial rank they can either jump two squares forward
  35   (vertically), or advance only one square in this same direction. After that
  36   first move they only advance one square at a time, vertically, moving up.
  37
  38 p.
  39   Pawns capture by moving forward (upper on the board) one square diagonally,
  40   when an enemy piece sits on that square.
  41
  42 p.
  43   When reaching the last rank, pawns must promote into any (friendly)
  44   other non-royal piece: queen, rook, knight or bishop.
  45
  46 p.
  47   Moves notations: "pawn" is implicit, so for a simple move we only write the
  48   destination square (because only one pawn at most can move forward to a
  49   specific square). Thus, 1.e5 means "pawn from e4 to e5". However, in case of
  50   captures the situation could be ambiguous (two pawns on the same rank), so
  51   the column is specified too: "fxe6" (for example).
  52   As you can see capture is marked by a cross symbol: "x".
  53
  54 figure.diagram-container
  55   .diagram
  56     | fen:k7/8/8/1prp4/1P1P4/8/6P1/7K g3,g4,c5:
  57   figcaption Possible pawn moves: g3, g4, dxc5, bxc5
  58
  59 p
  60   | For a piece movement, we just prepend the upper-case piece initial before
  61   | the previously described notation. A rook taking something on f3 square
  62   | writes: Rxf3. There are rules for ambiguous situation, but discussing them
  63   | now would be too far off-topic. Please visit for example the
  64   a(href="https://en.wikipedia.org/wiki/Algebraic_notation_(chess)")
  65     | Wikipedia page
  66   | for full information on this subject.
  67
  68 h4 Rooks
  69
  70 p.
  71   They move either horizontally or vertically, as far as they want while the
  72   path is free of pieces. If this path ends with an enemy piece, it can a
  73   priori be captured (a priori because if the move ends up with the king in
  74   check, then it's illegal).
  75
  76 h4 Knights
  77
  78 p.
  79   They are the only units able to jump over other pieces (without capturing
  80   them). They do "L" moves: two squares in one direction (horizontally or
  81   vertically), and then one square in an orthogonal direction.
  82
  83 figure.diagram-container
  84   .diagram
  85     | fen:k7/2p5/5q2/2b5/4N3/2R3r1/3P4/7K f6,d6,c5,f2,g3,g5:
  86   figcaption Possible knight moves from e4.
  87
  88 h4 Bishops
  89
  90 p.
  91   They move diagonally, as far as they want while the path is free of pieces.
  92   If this path ends with an enemy piece, it can a priori be captured.
  93
  94 h4 Queen
  95
  96 p.
  97   This piece combines the movement of a rook and a bishop, with the same
  98   conditions.
  99
 100 h4 King
 101
 102 p.
 103   This piece moves like a queen, but only by one square at a time. The final
 104   square must be either vacant or occupied by an enemy piece (therefore
 105   captured).
 106
 107 p.
 108   The king cannot be captured, but a move may ends up attacking enemy's king.
 109   It is said to be "under check" (or "in check") and the opponent must either:
 110 ul
 111   li move the king to a safe square, or
 112   li capture the attacker, or
 113   li intercept the attacking line.
 114 p.
 115   Depending on the situation one or more of these counter-measures could be
 116   impossible.
 117
 118 p Leaving our king in check after a move is forbidden.
 119
 120 figure.diagram-container
 121   .diagram
 122     | fen:r6k/4q3/8/8/8/B7/8/K7:
 123   figcaption Bxe7 is illegal (it allows Rxa1).
 124
 125 h3 Special moves
 126
 127 p.
 128   Apart from pawn promotion which has already been introduced, two special
 129   moves exist:
 130 ul
 131   li.
 132     castle: if both the king and the right-most (from white player perspective)
 133     rook haven't moved yet, and if nothing stand in the path from king to rook,
 134     and if the squares f1 and g1 are either free or occupied by the king or
 135     rook implied, then the king can go to g1 while the rook moves to f1. Note
 136     that since positions are shuffled one of these two pieces may apparently
 137     not move. The same can be done on the other side (left-most rook), and end
 138     squares are c1 for king and d1 for rook. The former is small castle, and
 139     the latter large castle.
 140     Notation: small castle writes "0-0" while large castle is "0-0-0".
 141   li.
 142     en-passant: after a pawn has jumped two squares, if an enemy pawn stands
 143     just next to it then it can capture the jumping pawn "en passant", exactly
 144     as if it had advanced only one square. The move is noted as usual, but
 145     with "e.p." in the end to indicate the special move. The capture is
 146     possible only right after the pawn jump: not later in the game.
 147
 148 figure.diagram-container
 149   .diagram.diag12
 150     | fen:nr1kb1r1/ppp3pp/8/2Pp4/8/7P/PP3PP1/1R3KBR:
 151   .diagram.diag22
 152     | fen:nr1kb1r1/ppp3pp/3P4/8/8/7P/PP3PP1/2KR2BR:
 153   figcaption.
 154     Left: black just played d5 (jump from d7).
 155     Right: after cxd6 e.p. and 0-0-0.
 156
 157 h3 End of the game
 158
 159 p.
 160   The best-known way to end a game is by "checkmating" the enemy king.
 161   This means that you end a move in a situation where the king can be captured,
 162   and your opponent has no way to avoid the capture.
 163   The checkmating player has one point and the other zero, so the score writes
 164   1-0 or 0-1 depending if white pieces or black pieces mated.
 165
 166 figure.diagram-container
 167   .diagram
 168     | fen:rnbqkbnr/ppp2Qpp/2np4/4p3/2B1P3/8/PPPP1PPP/RNB1K1NR:
 169   figcaption Famous mating pattern: 1-0
 170
 171 p All other ways to end the game lead to a draw (1/2-1/2); nobody wins:
 172 ul
 173   li when a player has no legal move but is not under check (stalemate),
 174   li.
 175     when a position is repeated three times with the same castling right and
 176     same player in turn,
 177   li when 50 moves are played without pawn movement or capture.
 178 p.
 179   Note: this last way to end a game is not implemented, because it quite seldom
 180   occurs, does not generalize so well to variants (it depends), and more
 181   important because games played on this website are not official tournament
 182   games. If you feel like manoeuvring for 200 moves and your opponent isn't
 183   bored, then keep going :)