while pile >= max_stones:
#        while [player 1's answer is not valid]:
#            p1move= int(raw_input("How many stones would Player 1 like to remove?"))
#
#
#        while [player 2's answer is not valid]:
#            [ask player 2]
#            p2move= int(raw_input("How many stones would Player 2 like to remove?"))
        pile = pile - p1move - p2move
#
#    print "Game over"