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