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
If I’m thinking for more than 20 minutes about one move, it’s usually a waste. Sometimes you can come up with some amazing solution but most of the time you just end up looping: you consider a move, you reject it, then you’re desperate, you come back to the move, you don’t remember why you rejected it, you have to make a move so you make it – then your opponent replies and you remember why you rejected it. The longest wait I ever did between moves was one hour and five minutes – and the move was horrible.
Magnus Carlsen 2016
Fischer’s strength, among other things, was his ability to evolve the most efficient plan for the middlegame right after the opening.
Boris Spassky
Carlsen: “I ran out of steam towards the end but fortunately I played better than he did”
Magnus Carlsen 2017
It’s always more difficult to hold the title than to get it.
Vladimir Akopian 2012
Some twenty years ago an English journalist complained that in sports, only chess and marbles were above suspicion. One wonders what has happened in the world of marbles.
Hans Ree