Endgame Study #18: Minor Piece Power

Hello everyone! Welcome back to today's daily endgame study! You've probably gotten the hang of it already, but there will be a small and a big hint if you scroll down.

Scroll down for hints

Small hint: The combination does not consist of all checks. Set up deadly threats with your bishop and knight! 

Big hint: You cannot stop black's queen from promoting. But checkmate is better! Force black to give up their queen in order to stop checkmate