The original road suddenly collapses and the three have to separate. Shaoyu walks into a chamber and the trap forces him to play a chess game, not the Go chess game in which the chessmen kill each other, but a reverse chess game in which the chessmen turns enemies to friends. Shaoyu was proud of his chess skill, but after a while he loses his priority and his life is threatened by the trap. He recalls his father's death on the battlefield, and tries his best to win the game. He finally wins the game and a weird weapon shows up before him.
天明、少羽和高月在禁地中面临侠道、王道之择，忽然出现的危急状况让三人不得不分头行动。踏入王道之室的少羽面剧情介绍对的是一副棋盘，却不是围棋，而是与围棋棋理相反的墨攻棋阵，整个棋局瞬息万变，令少羽措手不及。另一方面，班大师为众人介绍墨攻棋阵，少羽能否赢得这盘特殊的棋局牵动着众人的心弦。
