Classic Mate in One

Since pompom posted the solution six years ago, the next challenge is to construct a proof game for the starting position. Who will be first?

lol
Also, when you post alternatives, make sure black can't hang on by a thread.

This is a joke problem from Leonid Kubbel. The position is perfectly legal. Good luck trying to find the only mate in one in this position!
A lot of moves seem like mate, but look carefully and you will see why not.

This is a joke problem from Leonid Kubbel. The position is perfectly legal. Good luck trying to find the only mate in one in this position!
A lot of moves seem like mate, but look carefully and you will see why not.
Oi mate it's not classic

What about d8 and promote to queen? Looks like a win to me.
It's pinned.
What? How is it pinned?