If a King is unable to move, though not attacked, and none of his
remaining pieces can move, the King is said to be stale-mated,
and the game is drawn. A game is also drawn when neither side has
sufficient material left to enforce a mate. (Compare page 63.)

If a player resigns his game before he is actually mated, he
acknowledges that in the end mate is unavoidable, and the game is
counted as a loss to him.

A game is null and void if it is shown that a mistake was made in
setting the board or men. The same applies when in the course of
the game the position and number of pieces have been altered in a
manner not in accordance with the proper course of play, and the
latter cannot be re-constructed from the point where the error
was made.

If a player having the move touches one of his pieces he is under
compulsion to move it; if he touches a hostile piece he must
capture it, provided that the piece can be properly moved or
captured in either case. This rule is of no effect if the piece
so touched cannot be moved or captured, as the case may be. So
long as the hand has not left the piece to be moved, the latter
can be placed on any accessible square. If a player touches a
piece with the sole object of adjusting its position, he must
apprise his opponent of his intention by saying "J'adoube"
beforehand. It is best to move the King first when castling. If
the Rook is moved first, and unless the King is played almost
simultaneously, a doubt might arise whether castling or a Rook's
move only was intended.