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
People knew about 110 years of chess history. Nowadays, nobody is able to tell you the name of the world champion of 2000.
Anatoly Karpov 2005
FIDE is now a political organization. And being a political organization, it, of course, means that people in FIDE have some other interests – that is, to sit in their positions for the next hundred years.
Silvio Danailov 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
Ten years ago I said that 2010 would be the end, chess would be exhausted. But it is not true, chess will not die so quickly.
Vishy Anand 2008
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