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
A good sacrifice is one that is not necessarily sound but leaves your opponent dazed and confused.
Rudolf Spielmann
As chess players, Kasparov and Karpov have exhausted themselves, the people began to forget them and they are trying to attract attention with their inadequate statements.
Kirsan Ilyumzhinov 2010
I was pushed out of USSR by the hands of Petrosian and Karpov. But now, after 10 years, Petrosian is not longer alive and Karpov is not longer World Champion, so it seems that everything is in place now.
Viktor Kortchnoi 1986 NIC
Botvinnik, Korchnoi and Kasparov had to hate the opponent to play successfully. I belong to a different type of chess players. I’m like Keres, Spassky and Portisch. On the board we fight, but in life we get along great.
Anatoly Karpov 2015
In the 70s Karpov was a darling of the Politburo or the political elite. So Kramnik is now. Just like the old days. But at least Karpov, unlike him, played in and won qualifying matches.
Veselin Topalov