hard 9×9 Set 2 Grid Puzzle
5
9
1
3
8
2
7
3
9
7
5
1
2
8
3
5
9
7
6
8
1
5
6
4
3
1
8
9
7
4
4
9
5
7
6
4
8
2
9
6
2
8
5
7
9