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.
ECHESSPEDIA
Quotes of the Day
I think I would beat Tal pretty easily. Fischer would be more difficult, but I think I could beat him too.
Magnus Carlsen
I’ve got no regrets about the games themselves, as frankly I’ve never been narcissistic about my play.
Alexander Grischuk 2014
Some players lose ability to think independently and rely on computers completely.
Lajos Portisch 2012
This one hour allows me to put the problem into the background and then, when I come back, I am much more rational and less emotional about the particular problem and I can think better about it.
G. Borg 2016
You can’t look too annoyed or they’ll look for the mistake you’ve made. A lot of the time it’s about looking for these opportunities and if you give them a clue, the good players will find it.
Magnus Carlsen 2016