Fifteen

Developed by Pedro Izecksohn.

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

Fifteen

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

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