6
1
5
6
8
1
7
2
6
9
5
2
5
9
3
3
1
5
1
8
7
1
8
9
4
5
2
3
7
5
4
6
hard
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com