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