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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 ...
The rook (/ r ʊ k /; ♖, ♜) is a piece in the game of chess. It may move any number of squares horizontally or vertically without jumping, and it may capture an enemy piece on its path; it may participate in castling .
Castling may only be performed if the king and rook involved are unmoved, if the king is not in check, if the king would not travel through or into check, and if there are no pieces between the rook and the king. The knight moves from one corner of any two-by-three rectangle to the opposite corner. (This can be thought of as moving two squares ...
In a few cases, the superior side gives up their rook in order to promote the pawn, resulting in a winning queen versus rook position (see Pawnless chess endgame § Queen versus rook). A rule of thumb (with exceptions) is: if the king on the side without the pawn can reach the queening square of the pawn, the game is a draw ; otherwise it is a ...
In chess, the exchange is the material difference of a rook for a minor piece (i.e. a bishop or knight). Having a rook for a minor piece is generally advantageous, since the rook is usually more valuable. A player who has a rook for a minor piece is said to be up the exchange, and the other player is down the exchange.
The point values used for this purpose are based on experience; usually, pawns are considered worth one point, knights and bishops about three points each, rooks about five points (the value difference between a rook and a bishop or knight being known as the exchange), and queens about nine points.
Staunton style chess pieces. Left to right: king, rook, queen, pawn, knight, bishop. The rules of chess (also known as the laws of chess) govern the play of the game of chess. Chess is a two-player abstract strategy board game. Each player controls sixteen pieces of six types on a chessboard. Each type of piece moves in a distinct way.
The rook mate is one of the four basic checkmates. It occurs when the side with the king and rook box in the bare king to the corner or edge of the board. The mate is delivered by the rook along the edge rank or file, and escape towards the centre of the board is blocked by the king.