In the Madison airport bookstore/gift shop, I saw a three-dimensional Sudoku puzzle. It was a Rubik's cube, with six each of nine numbers instead of nine each of six colors.
I bought one of those in the Tucson airport a couple of weeks ago. As far as I can tell, it probably doesn't resemble the standard sudoku in having a unique solution; it also seems to have more possible solutions than a regular Rubik's cube, so from a mathematical point of view it is probably less interesting than either. I haven't unscrambled mine yet, mind.
![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
From:
no subject