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).
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Quotes of the Day
I think that the World Champion should try to defend the quality of play more than anyone else!
Boris Spassky
Kasparov’s book are the best, as far as high level analyses are concerned.
Jan Timman 1991 NIC
Chess is a scientific game and its literature ought to be placed on the basis of the strictest truthfulness, which is the foundation of all scientific research.
W. Steinitz
Tactics is what you do when there is something to do; strategy is what you do when there is nothing to do.
Savielly Tartakower
As chess players, Kasparov and Karpov have exhausted themselves, the people began to forget them and they are trying to attract attention with their inadequate statements.
Kirsan Ilyumzhinov 2010