Used a precomputed endgame database defining perfect play for all positions involving 8 or fewer pieces on the board, a total of 444 billion positions.

• 当棋盘上仅剩下8个或更少的旗子时，它使用一个预先计算好的残局数据库在共计444,000,000,000个节点里选出最完美的走法。