ADJOURNED GAME.
Upon a game being adjourned, the player whose turn it is to move shall seal his move. Sealing a move consists in writing it legibly on a piece of paper which shall remain in the keeping of a third party during the adjournment.
Upon the resumption of an adjourned game the position existing at the time of adjournment shall be set up and the sealed move made on the board.
If the position existing at the time of adjournment cannot be ascertained the game shall be annulled.
If upon opening a sealed move the record cannot be interpreted as expressing a legal move, the offending player may be required to move his King, or, if the King cannot legally be moved, a piece designated by his opponent. If the record can be interpreted as expressing either of two moves, the offender shall make the one selected by his opponent.
DRAWN GAMES.
A game is drawn—
(a) When the players agree to treat it as drawn.
(b) Upon the proof by either player that fifty moves have been made on each side without a piece being captured.
(c) When either player claims a draw upon his turn to play, and proves that the existing position has occurred at least twice before during the game.