# Message #4135

From: Andrew Farkas <ajfarkas12@gmail.com>

Subject: Re: [MC4D] Physical 2x2x2x2: algorithm that fixes a single 180° twist

Date: Fri, 14 Sep 2018 23:17:23 -0400

I think that’s the best we can do, since there’s no solution below 7 moves

for that case on the Speedsolving wiki

<https://www.speedsolving.com/wiki/index.php/PBL>; that’s probably HTM

<https://www.speedsolving.com/wiki/index.php/Half_Turn_Metric>-optimal.

- Andy

On Fri, Sep 14, 2018 at 8:13 PM lucas.denhof.58@gmail.com [4D_Cubing] <

4D_Cubing@yahoogroups.com> wrote:

>

>

> Hey everyone, I am the 9th solver of the physical 2x2x2x2 and have

> recently joined this group. I wanted to show you an algorithm I found that

> basically flips only one side of the cube 180˚.

>

> You can see the algorithm here: https://youtu.be/ru_OgVwlfKE

>

> I researched and have just found a quicker way of solving the 3d cube part

> of it by using a simple 2x2x2 solver.

>

> Instead of using this on both sides on both cubes: R’ F R’ B2 R F’ R’ B2

> R2 (36 moves long)

>

> I can now do this: R2 U F2 U2 R2 U R2 (28 moves long)

>

>

> Let me know if one of you finds a way to shorten it even more somehow.

>

> Thanks,

>

> ~Lucas

>

>

"Machines take me by surprise with great frequency." - Alan Turing