15x21 puzzle
Time:
1 2
2
1
2
3
2
8
3
6
2
3
1
7
2
3
1
5
1
3
5
1
5
1
6
2
5
1
5
2
4
6
4
3
3
1
1
 
3
6
8
9
10
1  3  4
5  1  2
2  2
4  2
6
 
 
2
5
1  9
11
9
 
 
2  2  2  2
You might wish to visit the archives, if you want more.