Fastest Checkmate!

This works if you start as black.

If your opponent goes pawn f2 to f3, it is a weak opening, already exposing their king. 

Then you move pawn e7 to e5, opening your queen.

White plays pawn g2 to g4, further weakening his position.

You play queen d8 to h4, delivering one of the fastest checkmates in the game, a very fun prank to play on your friends if they are beginners! Thanks for the read!