White makes the interference to avoid a stalemate by allowing a fight to the opposite King, which is met by a discovered mate by the same white piece.
ECHESSPEDIA
Quotes of the Day
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
I’ve been playing chess professionally for 35 years! It’s a long time, and when people can still say that they enjoy my chess, that’s great.
Nigel Short 2016
Looks like I’m going to raise the average age of the field and lower the average rating!
Garry Kasparov 2017
When I am White I win because I am White. When I am Black I win because I am Bogoljubov.
Efim Bogoljubov
Some twenty years ago an English journalist complained that in sports, only chess and marbles were above suspicion. One wonders what has happened in the world of marbles.
Hans Ree