Message #3926

From: Marc Ringuette <ringuette@solarmirror.com>
Subject: Re: [MC4D] Physical 2x2x2x2 - Canonical moves
Date: Fri, 05 Jan 2018 11:16:28 -0800

Sure, you violate the permutation parity of the 2^4 hypercube every time
you twist a single 2x2x1 block by 90 degrees (a 4-cycle).  I hope I
didn’t say anything to contradict that.

I was, perhaps clumsily, trying to point out that this is "all too easy"
to do by accident during the course of a solve, so one advantage of
allowing the 4-cycle moves is that you’re far less likely to find a
frown on your face toward the end of a solve, when you find that you’ve
strayed into an illegal state.

Marc

On 1/5/2018 11:03 AM, Luna Peña scarecrowfish@gmail.com [4D_Cubing] wrote:
> Wait, I thought you could run into permutation parity by only turning
> the faces of one 2x2x2