Definitions for "Castling"
Keywords:  rook, kingside, queenside, king, chess
A compound move of the king and castle. See Castle, v. i.
interchanging the positions of the king and a rook
A single move involving the King and Rook. To castle kingside move the King from e1 to g1 for White (from e3 to g8 for Black) and the Rook from h1 to f1 for White (from h8 to f8 for Black). To castle queenside move the King from e1 to c1 for White (from e8 to c8 for Black) and the Rook from a1 to d1 for White (from a8 to d8 for Black). There are restrictions to this move, however: 1.The King and whichever Rook involved in the move cannot have been moved previously. 2.The King will not land on a square that is controlled by the opponent. 3.The King cannot pass through a square that is controlled by the opponent. (See also kingside, queenside.)
That which is cast or brought forth prematurely; an abortion.