# Message #4060

From: Marc Ringuette <ringuette@solarmirror.com>

Subject: 2x2x2x2: a few algs and an example solve

Date: Thu, 12 Jul 2018 18:51:19 -0700

Hi gang! I’m back to studying the physical 2^4, after a 6 month

break. You know what that means: lots of little YouTube videos with

no production values whatsoever! I’ve uploaded six videos to the new

YouTube channel I’ve created for my puzzle stuff. Five short videos

describe the move set I’m using and a few algorithms, then I give a 10

minute solution video to put me on the HOF list.

Probably the most generally interesting of these videos is the third,

#23 in my numbering sequence, showing how to perform a 180 degree twist

on a single piece (in 30 moves using ROIL Zero). I shorten this to 10

moves in the case of orienting two opposite faces only, in video #24. I

used the shortened version in my example solve at this point 6m45s in:

https://youtu.be/N4lqDkDJ4Yo?t=6m45s

21 ROIL Zero moveset 1m11s https://youtu.be/hOt5DnDNibg

22 Sune+Antisune+twist2 3m17s https://youtu.be/R9DQhB88yMY

23 Doubletwist algorithm 2m17s https://youtu.be/Io4rN080V7c

24 Doubletwist, align two faces only, shorter, 3 cases 2m59s

https://youtu.be/wmdbYPiegqQ

25 Alg for final U2 on R cube 1m16s https://youtu.be/K2d01CMqtgw

26 Example solve 10m42s https://youtu.be/N4lqDkDJ4Yo

Just now, I tried an additional goofy experiment: a wildly different

solution method where I permute all pieces first, then orient them

afterwards! It only took half an hour or so. It was a hoot, try

it! I’m fascinated by the 12 orientations of these 4d puzzle pieces,

and the second half of this method is a way to focus in on orientation

exclusively.

Cheers

Marc