Nothingness: In chess, the 50 move rule has the purpose of ensuring that the player with the advantage exploits it efficiently. A case in point is that of an endgame with Knight, Bishop and King versus King. A skilled player can win within 50 moves with that advantage while a player uncertain of how to coordinate those pieces may well take longer. In the latter case, the game is a draw because of the inefficiency of the player with the advantage regardless of the fact that it would otherwise not be considered a draw position.