Message #4090

From: Jay Berkenbilt <ejb@ql.org>
Subject: Re: [MC4D] 2x2x2x2: List of useful algorithms (please add yours)
Date: Tue, 31 Jul 2018 15:28:44 -0400

I’ll add my algorithms to this thread too.

I don’t use very many algorithms per se: really only three (monoflip, gyro,
and generalized isolate/manipulate/reverse). I do use an "algorithm" for
corner orientation on the 2^3, but everyone has one of those. Otherwise, my
approach is to solve in a certain sequence and use ad hoc moves. I’ll
repeat the links to my main algorithms from my intro email. By the way, I
don’t know where I came up with gyroscopic as an anti-abbreviation of gyro.
Maybe I was trying to keep everyone on balance or something. Or maybe I hit
M-/ and dynamically expanded it. (Sorry, emacs reference….parts of my
brain are written in emacs lisp.)

I haven’t translated these into any notation.

For what it’s worth, I’ve avoided IY and OY moves (using Marc’s rotation)
as well as the temptation to go with mod 2 = 0 instead of mod 4 = 0 (given
that I can produce a fairly easy albeit lengthy series of moves to solve
from a 180 twist on a half slice) and have taken a more purist position of
adhering to canonical twists plus half twists with a cumulative mod 4 = 0.


On Tue, Jul 31, 2018 at 3:19 PM Luna Harran scarecrowfish@gmail.com
[4D_Cubing] <4D_Cubing@yahoogroups.com> wrote:

>
>
> It really means Orient Last Cell, but that works too 😁😁
>
> And the algorithms solve that state, rather than generating it. The
> reverse of the algorithm should generate it. Some of the algorithms might
> be wrong though, I haven’t touched it in a while. Try inverting some of the
> moves and see if that works.
>
> Macro files will have to wait a while, we’re about to go on holiday and I
> won’t have access to MC4D, sorry. I think the notation is pretty standard
> though.
>
> ~Luna
>
> On Tue, 31 Jul 2018, 18:32 Marc Ringuette ringuette@solarmirror.com
> [4D_Cubing], <4D_Cubing@yahoogroups.com> wrote:
>
> Thanks, Luna! OLC seems to mean Orient Last Corners. That sounds
>> useful. :)
>>
>> I need some help, though, I can’t make them work. Do you have a macro
>> file you could attach?
>>
>> Trying to perform them on MC4D, I was able to make "One twist" do the
>> right thing, but the 7 others I tried (Arm, Half Arm, Twist a, Twist b,
>> Thumb a, Thumb b, Tick a) all did odd things that did not match the photos
>> or the desired result. I wonder if our notations are subtly different?
>> But that would make it unlikely that "One twist" would’ve worked for me, so
>> probably not. Hmm.
>>
>> –Marc
>>
>> On 7/31/2018 9:03 AM, Luna Harran scarecrowfish@gmail.com [4D_Cubing]
>> wrote:
>>
> Here’s my (still massively incomplete) set of algs for 2^4 OLC. They’re
>> designed for the virtual puzzle, but some can be used easily on the
>> physical puzzle.
>>
>> http://wiki.superliminal..com/wiki/2%5E4_algs
>> <http://wiki.superliminal.com/wiki/2%5E4_algs>
>>
>>
>> Feel free to add your own algs or cases, just try to keep to the system
>> already there.
>>
>> ~Luna
>>
>>
>> Or
>>
>>
>