The king cannot castle when in check, nor after having been moved, nor if in passing he was exposed to a check, nor with a rook which has been removed from its place: and he that castles when he should not, must play his rook touched, or his king, at his own choice.

[32] One _square_ would be more correct: but the language of this tenth rule is retained verbatim; because the reasoning on which the rule rests, seems to depend on this mode of speaking. EDITOR.

[33] The old way of castling in several countries, and it still subsists in some, was to leave to the player’s disposal, all the interval between the king and the rook, along with the squares first assigned them.