The machines made stubborn players. Not only would they fail to recognize strategic pieces, they also continued to play well past the point where the game was put out of reach.
電腦非常「死心眼」，不但常常看不出關鍵棋，而且絕不肯棄子投降；即使勝負已定，只要棋盤還未填滿，它可以「海枯石爛」地下下去，此時，只有關機一途可以停止比賽。