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
I think that ACP is a small clique, which gives power to more cliques.
Nigel Short 2016
Of chess it has been said that life is not long enough for it, but that is the fault of life, not chess.
Irving Chernev
The winner of the game is the player who makes the next-to-last mistake.
Savielly Tartakower
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
When you see a good move, look for a better one
Emanuel Lasker