(noun.) interchanging the positions of the king and a rook.
(noun.) a large building formerly occupied by a ruler and fortified against attack.
(noun.) (chess) the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard.
(verb.) move the king two squares toward a rook and in the same move the rook to the square next past the king.
整理:昆廷
编辑:汤姆