def remove(self, row, col, value):
Stats.remove(self, row, col, value)
if (row == col): self.diag0 |= set([value])
if (row + col) == 8: self.diag8 |= set([value])
def remove(self, r, c, value):
Stats.remove(self, r, c, value)
e = self.board.coordToExtra(r, c)
if e != None:
self.extra[e] |= set([value])
