Rule #12
A draw is declared when neither player can force a win. When one side appears stronger than the other, and the player with what appears to be the weaker side requests the referee for a count on moves, then, if the referee so decides, the stronger party is required to complete the win, or to show to the satisfaction of the referee at least an "increased" advantage over his opponent within 40 of his own moves, these to be counted from the point at which notice was given by the referee. If he fails to do this, he must relinquish the game as a draw.

:))