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From: whuang@ugcs.caltech.edu (Wei-Hwa Huang)
Subject: Re: Megaminx solving times?
Date: 9 Mar 1999 15:46:55 GMT
Organization: California Institute of Technology, Pasadena
Message-Id: <7c3fpf$mte@gap.cco.caltech.edu>
References:
Christ van Willegen writes:
>I've been practising the Megaminx, and I can now solve it
>without resorting to formulas written down on paper. I can
>do it in about 10 minutes. How does this compare to other
>people's times?
I've never solved mine for speed, because I'm afraid of more
stickers falling off (already 3 are missing and I have to "deduce"
what they are). 10 minutes sounds reasonable -- I'm not sure I've
ever resorted to formulas written on paper. (For one thing, I'm
not sure I know of any notation!)
>And, what method do you use? The method I developed relies
>heavily upon the standard cube moves, and I solve the Mega-
>minx going down from one flat top in rings. I needed to
>adapt 1 (one!) standard cube formula to get it to work on
>the Megaminx.
This brings up, actually, a rather embarrasing point for me as a puzzle
solver. At first I had no idea how to generalize the standard cube moves
I used to the Megaminx. So, eventually I figured out a new method,
which was:
1. Solve a large chunk of it by normal moves, perhaps leaving
only three faces unsolved;
2. Solve the edges of the remaining faces (if you can solve an
Alexander's Star, you can do this);
3. Solve the corners.
I found this quite effective.
About a year later, when my Megaminx was in storage and I was
playing with the Cube, I suddenly realized that my method for the
Megaminx would work perfectly well for the Cube! (O, for that
matter, anything with a similar structure of "corners" with three
faces and "edges" with two faces.) I chastized myself
heavily for not realizing this "obvious generalization", and
with it was able to work out more moves for the Cube.
--
Wei-Hwa Huang, whuang@ugcs.caltech.edu, http://www.ugcs.caltech.edu/~whuang/
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