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
Botvinnik and Tal are among the best; I also like Spassky, but I think Petrosian is better than all of them. His weakness is too many draws, even against players he could beat easily. Maybe he lacks self-confidence.
Robert Fischer 1960
Karpov Lost, Kasparov Lost, the Only One Who Remained Is Me.
Silvio Danailov 2014
There was a moment at the beginning when the machines were a positive, but lately we’ve being passing to the other extreme. Now it seems that a move isn’t good unless the machine says so.
Veselin Topalov 2016
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
To Put It Mildly, I Have Not a Bit of Respect For Topalov
Vladimir Kramnik 2015