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