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If, during the course of the game, it be discovered that any error or illegality has been committed in the moves of the pieces, the moves must be retraced, and the necessary correction made, without penalty.
在比赛过程中，如发现棋子的走法有任何错误或违法之处，必须追溯走法，并进行必要的纠正，不得处罚。