8 5 3 1 7
9 7 1
8
9 5 2
7 1 8 9
6 5 4
5
4 6 7
3 8 7 4 1
13-02-2017......hard
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com