Fifteen

Developed by Pedro Izecksohn.

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

Fifteen

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

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