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Castling consists of moving the king two squares towards a rook, then placing the rook on the other side of the king, adjacent to it. Castling is only permissible if all of the following conditions hold: [11] The king and rook involved in castling must not have previously moved; There must be no pieces between the king and the rook;
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 ...
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 ...
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.
If a pawn moves to its last rank, achieving promotion, the piece chosen is indicated after the move (for example, e1=Q or e1Q). Castling is indicated by the special notations 0-0 (or O-O) for kingside castling and 0-0-0 (or O-O-O) for queenside castling. A move that places the opponent's king in check usually has the notation "+" suffixed.
5. The king does not end in a square that is under attack by an enemy piece. Moving the queen – queen can move like a rook or like a bishop (horizontally, vertically, or diagonally), but no castling. Moving the king – king may move one square in any direction, but may not move into check. It may also make a special move called "castling ...
Albers attempted to popularize the game in Germany in 1821 with updated rules. The starting setup is the same as for medieval courier chess. The king, queen, courier (bishop), knight, and rook have their modern powers. The bishop (or archer) can move one square diagonally, or leap diagonally to the second square.
The king slides two cells when castling short; three cells when castling long. Normal castling rules and restrictions apply. As in algebraic notation, each cell is identified by a letter+number combination. Ranks are horizontal and identified by numbers 1–8. Files are straight and 30° oblique to the vertical, identified by letters a–l.