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  2. Rules of chess - Wikipedia

    en.wikipedia.org/wiki/Rules_of_chess

    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 light or dark squares, not both.)

  3. Threefold repetition - Wikipedia

    en.wikipedia.org/wiki/Threefold_repetition

    Arimaa does not allow threefold repetition of the same position with the same player to move. In Go, a player may not make a move which repeats the previous position, as would occur if a player were to immediately recapture a stone in a ko situation. Creating ko threats is an important strategic consideration in Go.

  4. Zugzwang - Wikipedia

    en.wikipedia.org/wiki/Zugzwang

    Zugzwang (from German 'compulsion to move'; pronounced [ˈtsuːktsvaŋ]) is a situation found in chess and other turn-based games wherein one player is put at a disadvantage because of their obligation to make a move; a player is said to be "in zugzwang" when any legal move will worsen their position.

  5. Castling - Wikipedia

    en.wikipedia.org/wiki/Castling

    Castling is permitted only if neither the king nor the rook has previously moved; the squares between the king and the rook are vacant; and the king does not leave, cross over, or finish on a square attacked by an enemy piece. Castling is the only move in chess in which two pieces are moved at once. [3]

  6. Glossary of chess - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chess

    This glossary of chess explains commonly used terms in chess, in alphabetical order.Some of these terms have their own pages, like fork and pin.For a list of unorthodox chess pieces, see Fairy chess piece; for a list of terms specific to chess problems, see Glossary of chess problems; for a list of named opening lines, see List of chess openings; for a list of chess-related games, see List of ...

  7. List of chess variants - Wikipedia

    en.wikipedia.org/wiki/List_of_chess_variants

    Any player can move any of their pieces at any given moment. Marseillais chess (or Two-move chess): After the first turn of the game by White being a single move, each player moves twice per turn. Monster chess (or Super King): White has the king and four pawns (c2-f2) against the entire black army but may make two successive moves per turn ...

  8. Touch-move rule - Wikipedia

    en.wikipedia.org/wiki/Touch-move_rule

    The touch-move rule in chess specifies that a player, having the move, who deliberately touches a piece [a] on the board must move or capture that piece if it is legal to do so. If it is the player's piece that was touched, it must be moved if the piece has a legal move.

  9. Knight (chess) - Wikipedia

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

    Bishops utilize a longer range, but they can move only to squares of one color. The knight's value increases in closed positions since it can jump over blockades. [6] Knights and bishops are stronger when supported by other pieces (such as pawns) to create outposts and become more powerful when they advance, as long as they remain active. [4]