20x15 puzzle
Time:
2
6
1
2
6
1
2
6
1
2
2
3
1
2
1
3
1
2
1
1
2
1
2
3
2
1
6
1
1
4
1
1
1
1
1
1
1
1
2 1
1
1
5
1
2
1
1
1
2
3 1
3
1
3
11  5  2
7
 
 
 
 
 
9
4  3
3  4  3
5  5  1
8  1
9  2  4
7
6  4  3
You might wish to visit the archives, if you want more.