What is the rarest Checkmate or move in the history of Chess

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SivasankaranAK

What could be the rarest Checkmate a person could do?

John_Russell
Double knight I think?
Demonstrated here by Hikaru

https://youtu.be/3Xx75LpocOQ?si=3FwFpWml_pquqn9B
SivasankaranAK

Wouldn't an En Passant Checkmate be rarer?

JogoReal

Rarest move: you promote to Knight and draw the game by stalemate.