30个棋子由人机双方轮流取子，每次每方只能取走1，2或4个，拿到最后一个棋子的一方算失败。开始时随机决定那方先走，尽量保证机器能赢得游戏。-30 pieces by plane from the two sides take turns sons, each side can only take away every 1, 2 or 4, and won a pawn in the final one count of failure. Random decision at the beginning of the side ahead, as far as possible to ensure that machines can win games.