Wetten, dass..? vom 5. November

February 15, 2005. In my second attempt (first one was a while ago and I failed) I got it right, solved the super 5x5 cube blindfolded. As far as I know, I was the first to do this. Total time was 2 hours, 24 minutes, 59.96 seconds, including about 1 hour and 12 minutes for memorizing.

I used this 120 turn scramble produced by Jaap's excellent cube scramble program (thanks a lot for it!):

d B2 F2 d' U b2 U l' f u U2 l2 b' u2 U2 f2 R D2 f U' l d B u L' b' D2 F2 L d2 r' d' u F' U b2 L' R u2 R2 b2 r2 R' d f l2 F r' d B l2 r f' L2 d2 R' U' B' F' U2 L2 b f D2 f2 D2 b d2 l2 R' d r B' f2 l2 f' L2 B' r' u' r' d U' b' u f' F U f2 l2 u r D2 l' r' u2 l2 B2 l2 b' l U2 r' D2 U F u' U' r2 B' R b2 r' B' D' u R2 b d L

I had the inner slice parity, but not the outer layer parity and the center orientations were a multiple of four. I found a fairly easy way to deal with all parities, so they're not a big problem but it's nice to have about half of the parities so it's neither too hard nor too lucky. Well, "lucky" would be a 1/4 (or 1/8) chance so it wouldn't even be that lucky anyway...

I strongly suggest to never use multiple-layer turns if all you want to turn is the inner layer. It's a bit slower but it's so much easier to remember whether you have to undo r or Rr if you don't have to remember it at all. I think this was one of the three major reasons my first attempt failed.

And here are some pictures I took right before memorizing and after solving:

top before bottom before
top after bottom after

Stefan Pochmann
Last modified: March 20 2007, 21:27:09