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
When I am in the USSR, I have the feeling that every tram conductor plays chess better than I do.
Hans Ree
I believe motivation is one of the most important things one has to have after playing for many years. Chess is a very complete, well thought-out game, which is why people have been playing it since ancient times.
Judith Polgar
Chess…gives students an opportunity to think at a different level.
Dr. Chad Witherspoon 2014
I spend hours playing chess because I find it so much fun. The day it stops being fun is the day I give up.
Magnus Carlsen
Petrosian-Spassky? To think I could have watched an excellent football match instead!
Mikhail Tal 1966