def runSims(B, diff, piece):
probs = {}
for i in range(diff):
temp = Board(B.board, piece)
temp.playRandomGame(probs)
if temp.state == "win" and temp.piece == piece:
histLen = len(temp.history)
limit = 10
if histLen < 10:
limit = histLen
for h in range(0,limit,2):
hist = temp.history[h]
probs[hist[0]][hist[1]] -= 1/histLen**1.5
return probs[B.string]
