20x15 puzzle
Time:
3
8
2
1
7
1
4
5
4
1
5
4
1
4
3
1
3
2
1
1
1
3
1
1
2
1
1
1
1
1
1
2
1
1
2
2
2
1
4 4 1
2
1
2
2
1 1 1
1
1
2  7  4
2
1
2
1  3
5  3
4  1  1
17
2  5
5  1  4  1
17
9  1
6
2
1
You might wish to visit the archives, if you want more.