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Date: Fri, 19 Mar 1999 12:16:04 +0000
From: David Singmaster <david.singmaster@sbu.ac.uk>
To: hbizek@ameritech.net
Cc: cube-lovers@ai.mit.edu
Message-Id: <009D558A.B96AC759.280@ice.sbu.ac.uk>
Subject: RE: parity pairs

	Conway noted the two mirror-image orientations of the standard colour
pattern (W/Y, B/G, R/O).  One of the corners has  BOY  at a corner and he called
this a  BOY,  versus the mirror-image  YOB.  I think he read the colours clockwise?
Certainly most of the production was  BOY  and one had to hunt a bit for  YOBs.
Some cubists were particularly keen to have one orientation rather than the
other.

DAVID SINGMASTER,  Professor of Mathematics and Metagrobologist
School of Computing, Information Systems and Mathematics
Southbank University, London, SE1 0AA, UK.
Tel: 0171-815 7411;  fax: 0171-815 7499;
email:  zingmast  or  David.Singmaster  @sbu.ac.uk