[Retros] Re: cylinders, an old composition, not a discussion!

[Pastmaker at aol.com]

Andrew, 

    "Anchor ring" is what The Problemist editor substituted for the 
composers' "torus".  However, in what I have learned to refer to as a "senior 
moment", I erroneously recalled two of them and, unclear as to the correct 
plural for "torus", opted for the more easily pluralized (and preferable in 
England, at any rate) "anchor ring".  
    The list has been copied as I thought our colleagues might enjoy the 
problem.  It is one of the handful of non-retros I have composed, and I will 
honor you all by not posting others.
     It appears as Number F546 in the July 1980 Problemist, by joint 
composers S. Millman and T. Volet:  [5K1k/1Q6/8/7N/3n4/n7/8/6N1 (4,3)]  Mate 
in 1: (a) diagram, (b) vertical cylinder, (c) horizontal cylinder, (d) anchor 
ring, (e) vertical moebius strip (a1-a8 adjoiuns h8-h1), and (f) horizontal 
moebius strip (a1-h1 adjoins h8-a8).  Hannemann had earlier published a Mate 
in 1 with the first four surfaces, and Millman and I set out to extend that 
interesting idea.   If the 2 BNs are removed, the resulting position works as 
a Mate in 1 for each of the first 4 surfaces.  The absence of Ps seems 
tactful.
    Not long thereafter, Millman added two Klein Bottles, which I recall as 
being the moebius strips with edges joined.  That was published in die 
Schwalbe some time in the early 1980s (but I don't have a cite).

Regards,
Tom