Castling Castling Castling is a move in the game of chess involving a player's king and either of the player's original rooks. It is the only move in chess in which a player moves two pieces in the same move, and it is the only move aside from the knight's move where a piece can be said to "jump over" another. Castling consists of moving the king two squares towards a rook on the player's first , then moving the rook to the square over which the king crossed. Castling may only be done if the king has never moved, the
Alice Chess A and the bishop finishes on board B (see diagram). A move in Alice Chess has two basic stipulations: the move must be legal on the board on which it is played, and the square transferred to on the opposite board must be vacant. (Consequently, capture is possible only on the board upon which a piece currently stands: pieces on board A can capture only pieces on board A; pieces on board B can capture only pieces on board B.) After capture, the capturing piece transfers to the opposite board the same as a non-capturing move. To demonstrate, if the