How to Castle

Castle to either side

This diagram shows the board after both players have castled to the left. There is no rule that both players have to castle on the same side. Sometimes one player castles to the left and the other castles to the right. This is known as 'castling on opposite sides' of the board.

Index: How to Castle

1. The King's special move
2. King two squares toward the Rook which hops over the King
3. Castle to either side
4. King and Rook can't have already moved
5. King can't be under attack
6. King can't move through attack
7. King can't end under attack
8. No restrictions on Rooks regarding attacks