数独游戏 九直行九横列，共分成九个九宫格，每行列都由１到９、不能重复的阿拉伯数字组成，每个九宫格亦然。但数独游戏难易等级很多，每个只有一个解法。 可以添加关卡-few independent nine games nine straight row, divided into nine preview, each ranks by 1-9. we should not repeat the Arabic numerals, each preview so. But a few indep