Mate in 1- white to move

Knight to c6

Kc7 counters it. Not mate

Oh yeah. Hmm....

Okay, so I ran it through chess.com, it's actually mate in 2. There is no mate in 1.

Oh...

Rook to c8?

That's what I thought at first, but no. Such can be answered by Ka7

Pawn to a8 is checkmate

You don't even have to make the pawn anything

Ka8 takes the pawn and doesn't spell mate

Wait. You're actually on the right track. But you have to change the pawn and then one more move