Dacha Tactics #22 - Alekhine vs Yates dark magic.

This is a personal favorite of mine from my early childhood chess days. Alekhine is playing Yates, we have a great knight and 2 strong rooks. First -- what is the color $$? Well knight vs light bishop means we have extra dark $. Which squares are sensitive in black's game? Once we find these we shall pounce with all our vigor!

Interact with the puzzle below. If you get stuck, you can always click the "lightbulb" icon in the lower-left of the puzzle frame. Good luck!