It's cruel, deadly, and just this side of unbelievable.
Some people call it playing chess on the edge.
When our position is so great that we could reek havoc if only a defender was removed, then we have grounds to think the loudest of all thoughts . . We can remove defenders by destroying them or decoying them to squares where they can't help out for the defense. If Rxb3 then Nf7 mates. Ra7 to stop the mate. When your opponent's pieces are on the defense, and you cannot destroy the key defender, don't give up hope.