A type of chess problem (mating or winning) where two or more defenses illustrate the same theme.
ECHESSPEDIA
Quotes of the Day
Whatever opinions people might have about Ilyumzhinov, I am sure that exactly those accusations by the US authorities are far-fetched. It looks more like a revenge for the 2014 FIDE elections which Kasparov lost to Ilyumzhinov by a wide margin.
Vladimir Kramnik 2016
Kasparov doesn’t care about chess, but only about himself and his political goals
Kirsan Ilyumzhinov 2015
When I see the Berlin defence, I am almost happy that I am not longer a top player!
Nigel Short 2016
Looks like I’m going to raise the average age of the field and lower the average rating!
Garry Kasparov 2017