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
My style is based on giving energy and creating. Karpov’s style is something that is probably taking energy from his opponent. NIC 1989
Garry Kasparov 1989 NIC
We will note the openings used by the participants of a nine-round match. The age of openings is considerably higher than the age of both rivals. Some opening positions could be analyzed by Steinitz when he was preparing to his match with Zukertort.
Mikhail Tal 1966 (Petrosian-Spassky match)
Kasparov is great as a chess player, but all his attempts to prove himself as an organizer – let’s say, is beyond the champion’s level.
Boris Gelfand 2016
We lost the crowns of World Champions, it is sad, of course. But if you look at the rating list of top 100 players, Russia is still dominating. However, the competition is constantly growing stronger.
Arkady Dvorkovich 2011