Message #1792

From: Eduard <baumann@mcnet.ch>
Subject: [MC4D] Re: 24-cell FT solved!
Date: Mon, 20 Jun 2011 07:42:59 -0000

I’m not surprised that Nan is still alone to have solved the "24cell FT" with MPUlt. I have taken a look and find that the puzzle is a lot harder to solve than the 3x3x3x3.
Has Matt Galla solved it? No item in Wiki.

— In 4D_Cubing@yahoogroups.com, Nan Ma <mananself@…> wrote:
>
> Hi Matt,
>
> My move count was 54199. I know there’s a big room to improve. My way of
> separating permutations from orientations does incur large move counts. So,
> good luck on a shortest move solve!
>
> Nan
>
> On Sun, May 15, 2011 at 12:18 AM, Matthew Galla <mgalla@…> wrote:
>
> >
> >
> > Congrats Nan,
> >
> > I knew I wasn’t gonna be fast enough to be the first one done, but I do
> > have about 50% done and all algorithms ready. Having just got out of a
> > particularly difficult year of college (junior math/engineer double), I’ve
> > been having trouble dedicating enough time to sitting here nd solving it ;)
> >
> > Perhaps I can beat you in moves? ;) How many was yours?
> >
> >
> > As for the 120Cell, as I mentioned before, I believe it took me roughly 150
> > hours, based on some random samples of how quickly I was solving pieces on
> > average. I only used 2 permutation algorithms, very similar to eachother,
> > and of only 8 and 12 moves and after doing them a couple of times, they
> > easily become memorized. The actual process of clicking through the moves of
> > these algorithms only took me about 16 seconds for the short one and about
> > 30 seconds for the second. Although I never memorized setup moves, it was
> > simple enough to abuse the undo feature to see exactly what setup moves I
> > used and remember them for the 10 seconds it took to redo back to the end of
> > the current solve. So my point here is that having the macros isn’t as big
> > of a handicap as you may think. In fact, I’ve barely used any macros so far
> > in my 24Cell solve. Especially in the beginning, they actually really hurt
> > your flexibility in move count and setups.
> >
> > Congratulations again on the solve. You have too much free time and
> > dedicaton!!! :D
> > Hopefully I’ll be able to finish my solve and provide some great
> > competition for lowest move count ;)
> >
> > -Matt Galla
> >
> > On Sun, May 15, 2011 at 1:07 AM, schuma <mananself@…> wrote:
> >
> >>
> >>
> >> Hi,
> >>
> >> Let me tell the story of solving the 24-cell. Everybody knows that 24-cell
> >> is much sexier than 16-cell. So after solving the 16-cell, I looked at the
> >> 24-cell. There are only five types of pieces to solve in the 24-cell,
> >> compared with eight types for the 16-cell. The 3-cycle algorithms are
> >> similar to the counterparts for the 16-cell. So it didn’t take long to find
> >> them. Unlike the 16-cell, I prepared many different rotation algorithms to
> >> fix the orientations of corners and edges, so that whenever I need any of
> >> them, I can directly pull it off the shelf without thinking. I don’t want to
> >> go into details because that would spoil the fun to those who wanna analyze
> >> it by themselves.
> >>
> >> After I prepared all the algorithms, I still don’t know if I can face the
> >> main difficulty of the 24-cell. The main difficulty is, of course, there are
> >> too many colors. This time I use shift+left, shift+right a lot. Basically
> >> I’m using them to find pieces. I never trust my color identification ability
> >> because there are too many close colors. I only claim two pieces have the
> >> same color when they are highlighted at the same time when I use
> >> shift+right. In the beginning I wasn’t sure if I could really handle 24
> >> colors. So I used the first step, the face centers, as a test for me. The
> >> face centers don’t need complicated algorithms. Finding pieces of certain
> >> color is everything. I started the solve on Friday afternoon, when I
> >> finished the work I had to do for the week. I solved all the face centers
> >> intuitively. It meant that I could handle the colors.
> >>
> >> After dinner I resumed the solve from about 9pm. By 2am, I solved all the
> >> pieces except for the side-face pieces. I thought I should go on to finish
> >> it, if the side-face pieces could be solved quickly. Then I used a stopwatch
> >> to time myself on solving one such piece. In that trial I was nervous and it
> >> took me 40 seconds to spot the colors, find the place it should go (using
> >> shift+right), setup, call the macro and reverse setup. A simple calculation
> >> told me that I needed three more hours for all the pieces. So I gave up and
> >> went to bed. On Saturday I got up earlier than in weekdays and indeed spent
> >> three more hours to finish it.
> >>
> >> This one is my longest solve to date. There are six hundred pieces or so
> >> and I can use macros. I really don’t know how someone can solve the 120-cell
> >> without macros.
> >>
> >> Nan
> >>
> >>
> >> — In 4D_Cubing@yahoogroups.com, Melinda Green <melinda@> wrote:
> >> >
> >> > Congratulations, Nan!
> >> > The 24 Cell is a very unique object. I’m sure we will all enjoy hearing
> >> > your story.
> >> > -Melinda
> >> >
> >> > On 5/14/2011 12:13 PM, schuma wrote:
> >> > > Hi guys,
> >> > >
> >> > > I just solved the cell-turning 24-cell. The log file can be found
> >> here:
> >> > >
> >> > > <http://games.groups.yahoo.com/group/4D_Cubing/files/Nan%20Ma/>
> >> > >
> >> > > This is probably my longest solve ever. It took me 9 hrs and 25 min.
> >> I’ll probably write about my experience later today.
> >> > >
> >> > > Nan
> >> >
> >>
> >>
> >
> >
>