A chess problem, in which both Kings are mated, having usually two help-mate solutions. In one solution Black plays first and helps White to mate the Black King. In another solution White plays first and helps Black to mate the White King.
ECHESSPEDIA
Quotes of the Day
This one hour allows me to put the problem into the background and then, when I come back, I am much more rational and less emotional about the particular problem and I can think better about it.
G. Borg 2016
School is a waste of time for me. I want to be world chess champion, and they can’t teach me anything there.
Robert Fischer 1961
Kramnik was the luckiest man in the history of chess. He never won a single cycle, he got all the matches that he played for political reasons.
Veselin Topalov 2014
Kasparov doesn’t care about chess, but only about himself and his political goals
Kirsan Ilyumzhinov 2015
Agon was just sold for one pound and the reputation of Ilyumzhinov’s FIDE is worth even less than that.
Garry Kasparov 2014