Fifteen

Developed by Pedro Izecksohn.

1 2 3 4
5 6 7 8
D 9 F _
A B E C

Fifteen

1 2 3 4 5 6 7 8 D 9 F _ A B E C

1 2 3 4
5 6 7 8
D 9 F _
A B E C