This position is almost the same as the previous one but with an additional exchange required at the beginning: 1. Rxf7, RxR; 2. BxR+, KxB; and now Qc4+. Study this example to see how the same basic thought process still leads to the solution: the loose Black bishops are the targets; if White’s queen can move to c4 and give check, it will win a piece. Bxf7 is ineffective here because of the rook on f8, so you keep looking for more artillery you can bring to bear and find that the exchange Rxf7, RxR makes possible the bishop check and sacrifice that in turn leads to the queen fork.