数独游戏，由81个单元格组成，游戏开始时，部分单元格已经填入一些已经知道的数字，玩家需要在剩下的单元格中填入数字，使数字在每行、每列、每区(3行×3列)中都只出现一次。- Sudoku by 81 cells form when the game starts, fill in some part of the cell has been known figures, players need to enter the number in the rest of the cell, so t