# Message #2039

From: schuma <mananself@gmail.com>

Subject: Re: Solving 3^7

Date: Mon, 05 Mar 2012 02:18:54 -0000

Phew… I’ve just solved 3^7!

I’ve used 1.8 million moves to solve it, which is an order of magnitude greater than what Andrey used. But I’m fine with this number and the strategy that I’m using.

The duration of the solution is about 47 hours. But at about 45 hours the program made a error. It messed up the time of this log file with that of a test log file when I switched between them. I don’t know why it happened. So eventually the program said that I’ve used 27 hours. But it should be ~ 45 hours. The duration is similar to that of 120-cell, or the three {3,7} Klein Quartics combined.

The whole thing took me 15 days. So great it’s over.

Nan

— In 4D_Cubing@yahoogroups.com, "schuma" <mananself@…> wrote:

>

> Hi guys,

>

> There hasn’t been much discussion on high dimensional puzzles, and I haven’t solved any puzzle >= 4D recently. So I started my attempt to solve 3^7 in the last weekend.

>

> Since solving such a complicated puzzle is a somewhat tedious journey, I’d like to report my progress. Just now I’ve solved the 1C, 2C, 3C and 4C pieces. I’ve used 24 hours in total. I guess solving 5C and 6C pieces should be the most time consuming steps. I tried my best to find the fastest way to solve it but that’s what I’ve got. I can’t imagine how Charlie Mckiz solved everything in 27 hours. He solved 3^6 first. Maybe he learned and practiced some good techniques there. However, I, just like Andrey, skipped 3^6 and directly came to 3^7.

>

> I’d like to thank Andrey for telling me how the state of the puzzle is represented in the log file. Thanks to him, I’m able to automatically track the percentage of completion for each type of pieces.

>

> Maybe I need two more weeks till I solve it completely. I hope that day comes sooner.

>

> Nan

>