Inspired by the Classics Part II

One of the perks of chess teaching is that I get to familiarize myself with a lot of classic chess games and tactics. One of my favorite of these games is a Fischer brilliancy, most well known for the following position. I suggest trying to figure out what white should play here before clicking through to find the answer.

Did you play Fischer's move?



Black can't play 19... Bxf6 because of 20. e5, leading to a forced mate on h7.



Today, in one of my own games, I had a simpler version of Fischer's mating tactic. My International Master opponent's bishop was already on f6, which is what gave me the idea for the nice finish.

What would you play in the position below?