A combination of vertical and horizontal cylinder boards, used for Fairy Problem, so that not only do the a- and h-files adjoin, but also the 1st and 8th rank, and the board has no edges at all. It is sometime diagrammed without edges.
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Quotes of the Day
Carlsen simply plays chess well. It seems to me that in such cases people are inclined to look for some supernatural explanation, although the simplest explanation is also the most appropriate: the guy simply plays chess well.
Alexander Grischuk 2014
Carlsen will sooner or later become World Champion. I like him, he is a Monty Python fan, just like me.
Vishy Anand 2008
Tal develops all his pieces in the centre and then sacrifices them somewhere.
David Bronstein
I am the best player in the world, and I am here to prove it.
Robert Fischer 1971
I still think people can learn at any age – I’m actually sure about that. It’s just that the ceiling is lower for how far you want to go.
Magnus Carlsen 2016