3
6
1
8
2
9
4
1
8
7
2
4
8
3
5
4
4
3
6
1
9
4
5
2
7
3
6
1
9
2
02-09-2017......hard
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com