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