数独游戏源码九直行九横列，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。但数独游戏源码难易等级非常多，每个只有一个解法。能添加关卡 -The source of Sudoku nine straight nine row, divided into nine squared, each ranks by 1-9, can not repeat the Arabic numerals, each squared versa. However, the sou