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