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Castling originates from the king's leap, a two-square king move added to European chess between the 14th and 15th centuries, and took on its present form in the 17th century. Local variations in castling rules were common, however, persisting in Italy until the late 19th century.
The king and rook involved in castling must not have previously moved; There must be no pieces between the king and the rook; The king may not currently be under attack, nor may the king pass through or end up in a square that is under attack by an enemy piece (though the rook is permitted to be under attack and to pass over an attacked square);
Castling, derived from the "king's leap", usually in combination with a pawn or rook move to bring the king to safety, was introduced. These new rules quickly spread throughout Western Europe. Writings about chess theory began to appear in the late 15th century.
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. None of ...
It is the only time two pieces are moved in a turn. Castling can be done on either the kingside (notated 0-0) or the queenside (0-0-0). Castling cannot be done in reply to a check, nor if the king were to cross or land on a square which is under attack by the opponent, nor if either the king or the rook involved has already moved. [67] [68]
The king may participate in castling, which is a move consisting of the king moving two squares toward a same-colored rook on the same rank and the rook moving to the square crossed by the king. Castling may only be performed if the king and rook involved are unmoved, if the king is not in check, if the king would not travel through or into ...
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 ...
Anti-King chess: Features an anti-king. The anti-king moves in the same way as a king. This piece is in check when not attacked. If a player's anti-king is in check and unable to move to a square attacked by the opponent, the player loses (checkmate). The anti-king cannot capture enemy pieces, but can capture friendly pieces.