20x15 puzzle
Time:
8
6
2
12
1
11
2
10
15
14
13
13
12
3
8
11
1
2
1
1
3
5
10
14
14
15
15
2 1 2 4
6 1 3 4
1 9 4
2 5 1 5
3 5 1 6
9 1 6
11 6
11 5
10 6
11 6
11 7
10 6
11 7
10 4
7 2
Opacity:
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