Sudoku, the game is divided into three difficulty to generate a Sudoku matrix, marked function.
数独游戏，游戏分三个难度来生成数独矩阵，有标记功能。
Sudoku, the game is divided into three difficulty to generate a Sudoku matrix, marked function.
数独游戏，游戏分三个难度来生成数独矩阵，有标记功能。