9 1 2 6
4 1 2 5
2 9
8 6 5 4
5 6
2 3 7 1
6 3
2 8 1 7
3 4 5 1
13-09-2015......difficile
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com
www.daily-sudoku-puzzle.com