Message #2031

From: Roice Nelson <roice3@gmail.com>
Subject: Re: [MC4D] Re: Super Puzzle Sunday!
Date: Sun, 19 Feb 2012 10:13:54 -0600

Hi Ed,

You will be interested to read this short thread from late
2007<http://games.groups.yahoo.com/group/4D_Cubing/message/422>
regarding
the problem of finding an "optimize" procedure. Melinda shared some nice
visual analogies to help think about what an optimizer would do. It does
seem like a difficult problem!

Roice

On Sun, Feb 19, 2012 at 4:17 AM, Eduard <baumann@mcnet.ch> wrote:

> "Shortest" solver vs "many" solver.
> I have discovered only now that in MagicTile vs 2 after an application of
> a macro the natural undoing with the opposite mouse button costs a lot of
> twists. Instead of this you must undo the macro application by ctrl Z and
> this is possible! I very often undo macro applications because I’m learning
> by doing. In the program MPUlt there is an option "optimize" which corrects
> that situation partially.
> A perfect "optimize" procedure is probably not easy to implement.
> Iteratively eliminate local identity groups of twists.