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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]
A form of long algebraic notation (without piece names) is also used by the Universal Chess Interface (UCI) standard, which is a common way for graphical chess programs to communicate with chess engines, e.g. e2e4, e1g1 (castling), e7e8q (promotion). [10]
No Stress Chess: Marketed for teaching beginners, the piece(s) a player is able to move are determined by drawing from a deck of cards, with each card providing the rules for how the piece may move. Castling and en passant are disallowed. [105] Panic Chess: Player selects a piece to move, but the target square is randomized from all possible ...
Square names in algebraic chess notation. To resolve ambiguities, an additional letter or number is added to indicate the file or rank from which the piece moved (e.g. Ngf3 means "knight from the g-file moves to the square f3"; R1e2 means "rook on the first rank moves to e2").
Each square has two names, depending on the viewpoint of White or Black. Each file is given a name corresponding to the piece that occupies the first rank at the start of the game. Thus, in English descriptive notation the queen 's file is named "Q" and the king 's file is named "K".
In chess problems, battery refers to an arrangement of two pieces in line with the enemy king on a rank, file, or diagonal so that if the middle piece moves a discovered check (or a threat other than a check) will be delivered. [28] See also Alekhine's gun. BCF British Chess Federation, the former name of the English Chess Federation. [29] See ...
Chess notation systems are used to record either the moves made or the position of the pieces in a game of chess. Chess notation is used in chess literature, and by players keeping a record of an ongoing game. The earliest systems of notation used lengthy narratives to describe each move; these gradually evolved into more compact notation systems.
When castling, the king moves two squares horizontally toward one of its rooks, and that rook is placed on the square over which the king crossed. Castling is permissible under the following conditions: Neither the king nor the castling rook have previously moved. No squares between the two pieces are occupied. The king is not in check.