to mate with a particular Pawn, he may not Queen it.
XXXVIII. When a player undertakes to mate on a particular square, his adversary's King must be on the square in question when it is mated.
XXXIX. If a player undertakes to win a game in a particular way, he is to be adjudged the loser if he wins it in any other way, or if the game is drawn.
(The rules for ordinary play apply when odds are given unless they are obviously inapplicable).
Rules for Play by Consultation.
XL. Each player is bound by the move communicated to the adversary, whether such move be declared by word of mouth, in writing, or be made on the adversary's board.
XLI. If the move communicated differ from that made on the player's own board, the latter must be altered.
XLII. If a move, as communicated, admit of more than one interpretation, the
