Algorithm thought:
Rules of Sudoku game:
Every line uses 1, 2, 3, 4, 5 , 6, 7, 8, 9 positions are not limited;
Each column uses 1, 2, 3, 4, 5, 6, 7, 8, 9 positions are not limited
Algorithm thought:
Rules of Sudoku game:
Every line uses 1, 2, 3, 4, 5 , 6, 7, 8, 9 positions are not limited;
Each column uses 1, 2, 3, 4, 5, 6, 7, 8, 9 positions are not limited