This puzzle is a replica of a game that Jerry saw on Joe's phone on Saturday, Dec 17, 2011.

1 |
2 |
3 |
||

4 |
5 |
6 |
||

7 |
8 |
9 |

There are no impossible positions. To PROVE this requires an algorithm that shows that:

[12]

[34]

can be changed to:

[12]

[43]

Through trial and error, I've come up with:

d d a a b b c c a c d d b d d a d d c c d

This is 21 steps long, and requires all four buttons. I suspect there are shorter algorithms; I doubt that the transformation can be done with only two buttons. If you think you have such an algorithm, please let me know at jhouse1234@yahoo.com .

Hope you enjoyed this puzzle, and thanks to Webmaster Andrew for putting in this easter egg.