23x15 puzzle
Time:
7
4
7
3
6
3
5
3
4
3
4
3
3
4
3
4
2
5
2
6
2
7
2
7
2
7
1
8
2
8
5
9
15 5
9
15 15 15 15 15
23
13  9
8  8
6  8
4  8
3  1  5
2  8
10
13
14
15
1  17
23
23
23
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