Gotcha, ya little bugger...

De Boerderij met Lords of the Backstage

When Sinter Klaas decided to tease me with this one, my mind flashed instantaneously back to one of the small classrooms in Fitzharrys Sixth Form block, where I'd first encountered Rubik's Revenge, courtesy of Martin Patrick, whose cousin had lent him his. Our small group had, in the fourth year, had a friendly competition to learn the original cube, where each was responsible for his own algorithms but, once a transformation was demonstrated as learned, alternatives were shared.

I'd only been able to play with the Revenge for a couple of hours then and had, as was the case with all of us, faltered on the main difference with the original - the centre pieces are not only four in number on each side, they are fixed neither with relation to each other nor to the other "sides".

Well, I initially sat down to accept the challenge one evening before going to England in December and worked out my first algorithm for the centre pieces. Over Christmas I spent a few hours working out another core transformation that optionally could include centre pieces and centre edges for the "last" row. The Revenge infuriatingly kept throwing up the same final challenge - just two central edges to swap. I could reliably get back to this stage each time in three or four minutes, so I set it down to think for a couple of days...

...and finally, driven on by Dutch Pop Idol having an 80s themed evening, where they kept showing the original cube, I cracked it.

If the above won't play on your machine, try this one.

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