12:47pm, Monday 4 January 2016
I was given a Void Cube for Christmas. It's like a Rubik's Cube with holes through the middle, and looks like it should fall apart. The missing/unmarked centre pieces do still matter, and in fact make the puzzle harder, because it's possible to (try to) solve the cube around the "wrong" centre pieces - which is impossible in some positionings.
In the notation from my earlier cube notes, the sequence to put this right - by swapping the front-top and right-top edges - is:
ram to ram ta rom ta rom ti ram ta