Date: Sun, 07 Dec 80 14:01:00 -0500 (EST)
From: Bernard S. Greenberg <Greenberg@MIT-Multics>
Subject: Re: That 28 move Plummer Cross
I do not believe that (r u r' u')^3 is a local maximum.
An move other than r, u, r', u', (e.g., l) seems to pervert
it further than any of the four which bring it back.