15x20 puzzle
Time:
2
3
2
2
1
7
1
4
10
1
1
9
1
5
1
6
1
1
2
1
5
2
5
3
1
2
3
2
3
6
13
1
2
3
5
1 5 2
6
2 1
1 5
4 5
1 2 2
4 1
3 1 2
6 2
6 2
5 4
5 5
12
Opacity:
Original image
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