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  2. Rules of chess - Wikipedia

    en.wikipedia.org/wiki/Rules_of_chess

    The king moves exactly one square adjacent to it. A special move with the king known as castling is allowed only once per player, per game (see below). A rook moves any number of vacant squares horizontally or vertically. It also is moved when castling. A bishop moves any number of vacant squares diagonally. (Thus a bishop can move to only ...

  3. Castling - Wikipedia

    en.wikipedia.org/wiki/Castling

    During castling, the king is shifted two squares toward a rook of the same color on the same rank, and the rook is transferred to the square crossed by the king. There are two forms of castling: [4] Castling kingside (short castling) consists of moving the king to g1 and the rook to f1 for White, or moving the king to g8 and the rook to f8 for ...

  4. Touch-move rule - Wikipedia

    en.wikipedia.org/wiki/Touch-move_rule

    Castling is a king move, so the king must be touched first. If the rook is touched first instead, a rook move must be made. [b] If the player touches a rook at the same time as touching the king, the player must castle with that rook if it is legal to do so. If the player completes a two-square king move without touching a rook, the player must ...

  5. King (chess) - Wikipedia

    en.wikipedia.org/wiki/King_(chess)

    The king (♔, ♚) is the most important piece in the game of chess. It may move to any adjoining square; it may also perform, in tandem with the rook, a special move called castling. If a player's king is threatened with capture, it is said to be in check, and the player must remove the threat of capture immediately.

  6. Glossary of chess - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chess

    castling A move in which the king and a rook are moved at the same time. It moves the king from the center to a flank where it usually is safer, and it develops the rook. It is the only time two pieces are moved in a turn. Castling can be done on either the kingside (notated 0-0) or the queenside (0-0-0).

  7. Chess - Wikipedia

    en.wikipedia.org/wiki/Chess

    The king moves one square in any direction. There is also a special move called castling which moves the king and a rook. The king is the most valuable piece—it is illegal to play any move that puts one's king under attack by an opponent piece. A move that attacks the king must be parried immediately; if this cannot be done, the game is lost.

  8. Chess960 - Wikipedia

    en.wikipedia.org/wiki/Chess960

    As in classical chess, each player may castle once per game, moving both the king and a rook in a single move; however, the castling rules were reinterpreted in Chess960 to support the different possible initial positions of king and rook. After castling, the final positions of king and rook are the same as in classical chess, namely:

  9. List of chess variants - Wikipedia

    en.wikipedia.org/wiki/List_of_chess_variants

    Anti-King chess: Features an anti-king. The anti-king moves in the same way as a king. This piece is in check when not attacked. If a player's anti-king is in check and unable to move to a square attacked by the opponent, the player loses (checkmate). The anti-king cannot capture enemy pieces, but can capture friendly pieces.