WWSF%. Percentage of hands that a player wins when he sees the flop.
WWSF Rating. Quotient that comes from dividing the percentage of hands won by a player when he sees the flop by the average hands that the player should have won based on the number of active players post-flop. For example, imagine that a player has seen four flops (2 heads-up against another opponent, 1 against two rivals and another against three rivals) and that of the 4 hands has won 2. The W $ WSF Rating would come out of the next formula: 2 / (0.5 + 0.5 + 0.33 + 0.25) = 2 / 1.58 = 1.27. Any value greater than one is positive.