15x18 puzzle
Time:
18 4
6
4
6
4
6
3
4
3
3
2
4
3
6
3
4
3
2
2
1
2
1
2
1
1
1
4
2
1
2
15
13  1
6  3
4
1
1
1
1
1
1
1
1  2
4  1
4  1
5  3  1
9  1
10  2
15
You might wish to visit the archives, if you want more.