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
I understood that through chess I could express myself and chess became my natural language.
Boris Spassky 1995
In the past twenty years Kramnik has played a few thousand games, and if you show me a position from one of them, in 90 percent of the time I will be able to tell you which game it is from.
Vishy Anand 2008
When you see a good move, look for a better one
Emanuel Lasker
I don’t particularly like being searched electronically. It is inconceivable that such a thing would happen in any other sport. It is fundamentally anti-chess, and I think the people who are behind this decision need their heads looked at! They are sick! They are ruining the very beauty that is chess.
Nigel Short 2016
Petrosian would never have beaten me if he had played like that in 1963.
Mikhail Botvinnik 1966