Fifteen

Developed by Pedro Izecksohn.

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

Fifteen

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

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