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Date: Thu, 21 Aug 1997 23:19:45 +0200
From: Herbert Kociemba <kociemba@hrz1.hrz.th-darmstadt.de>
To: cube-lovers@ai.mit.edu
Subject: Re: isoglyphs

michael reid wrote:

> here are several other applications that your pattern finder should
> be able to handle easily:
> 
> 1. classify all "snakes".  you've already done the part where they
>    consist only of faces of type 42; there's also face type 4D to
>    consider.

There are 57 different patterns, which have face type 42 or 4D. I don't
think I should list generators for them here. The pattern-computation
with my program took only about 3 minutes on a PC with 486 processor, so
anybody who wants could repeat the computation and then create
generators for the patterns he/she(?) is interested in.

> 2. confirm my results on the "czech check" problem, i.e. classify all
>    patterns that have exactly eight squares correct on each face.

Cube Explorer finds 56 patterns, which confirms your result.

> and they are certainly many other applications.  these three come
> to mind immediately.  it looks like i'll have to find a windows machine
> to try out your program; it sure sounds excellent.

And I thought, window machines are very popular....

--Herbert