15x20 puzzle
Time:
3
2
1
5
2
1
9
9
8
2
2
3
1
2
2
9
2
1
11
8
1
2
4
1
7
4
2
2
5 1
5 1 4
9 3
8 3
4 3
3 1
4 2 1
8 1
4
1
1
2 2 1
3 1
3 1
3 1
3
3
3
3
5
Opacity:
Original image