15x23 puzzle
Time:
1
1
1
1
3
1
1
1
2
3
5
2
4
1
2
3
6
2
3
7
8
17
16
15
15
4
7
9
9
6
6
1 5
4
1 4
2 5
2 5
2 8
9
5
7
9
11
Opacity:
Original image
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