1)

1 Qg8+ Rxg8

Or 1...Nxg8 2 Nf7#.

2 Nf7#

This is of course the simple Philidor’s Mate, but with the knight also covering g8. It makes no difference here, but I once discovered to my cost in a lightning game that if the rook is on f8 and the knight on f6, there is no mate!