hard 12×12 Set 10 Grid Puzzle
8
10
12
3
12
1
4
11
8
12
4
5
6
5
3
6
2
12
4
11
3
9
11
3
10
5
4
12
1
9
11
1
9
3
5
2
1
3
2
7
9
10
12
1
10
8