In Castling, the King must be first moved.
The penalty of moving the King prohibits Castling.
En Passant. Taking the Pawn “en passant,” when the only possible move, is compulsory.
Queening the Pawn. A pawn reaching the eighth square must be at once exchanged for any piece (except the King) that the player of the Pawn may elect.
Check. A player falsely announcing “check,” must retract the move upon which the announcement was based and make some other move, or the move made must stand at the option of the opponent.
No penalty can be enforced for any offence committed against these rules in consequence of a false announcement of “check,” nor in consequence of the omission of such announcement, when legal “check” be given.
“J’adoube.” “J’adoube,” “I adjust,” or words to that effect, cannot protect a player from any of the penalties imposed by these laws, unless the man or men touched, obviously need adjustment, and unless such notification be distinctly uttered before the man, or men, be touched, and only the player whose turn it is to move is allowed so to adjust.
The hand having once quitted the man, but for an instant, the move must stand.
Men overturned or displaced accidentally may be replaced by either player, without notice.
A wilful displacement, or overturning of any of the men, forfeits the game.