In chess composition, a pair of interference variations created by Walter Grimshaw (1832-1890) around 1850, in which piece X interferes with piece Y and vice versa.
ECHESSPEDIA
Quotes of the Day
I may be an old lion, but I can still bite someone’s hand off if he puts it in my mouth
Wilhelm Steinitz
After an upsetting defeat the best psychology for the next game is a placid draw
Dr. Vidmar
I understood that through chess I could express myself and chess became my natural language.
Boris Spassky 1995
Who was the greatest chess player? If chess is an art, Alekhine. If chess is a science, Capablanca. If chess is a struggle, Lasker.
Saviely Tartakower
Vugar Gashimov deserves to be immortalized!
Mahir Mamedov 2014