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Promote to knight on any side, nice puzzle
Edit
Only works with promotion to a knight on h8 file

Not true, if you promote on f8, Kf7 is still possible, you have to promote on h8 :)
But agree, it is nice!

missed that one, good that you corrected it
always way to blunder
knights are tricky

the most satisfying checkmates are with Knights in my opinion

G7 to F8, & swap for a queen. Its easy. But why are there so many queens everywhere?

no, it is not queen - you can block with other queens
you have to promote to knight on h8 - double attack

Aah good call. I missed that. 🙌