A theme in problems where four black interferences are included by four possible moves of two black pawns. The two pawns, by the very conditions, must stand on their original squares (BCM 55/245).
ECHESSPEDIA
Quotes of the Day
Chess is my hobby. I have been playing chess since five years old. I like to play chess, to help chess, sponsoring chess, and attract my business friends to chess in order to develop and popularize chess. Everybody has a hobby. My hobby is chess, boxing and Buddhism.
Kirsan Ilyumzhinov 2010
Karpov is the official World Champion, but I’m not sure what that really means.
Jan Timman 1993
It’s always better to sacrifice your opponent’s men
Savielly Tartakower
Carlsen is paying far less attention to opening theory than his rivals, he is happy to go down paths that may offer no advantage yet have the benefit of dragging opponents out of their “openings book”. Once beyond the reaches of computer-aided openings, Carlsen starts to turn the screw.
Judith Polgar FT, 2014
I don’t believe that Garry likes making decisions by democratic procedures. When there is a decision that he doesn’t like, he just turns against this organization.
Georgios Makropoulos 2013