Petrov's defence fail(10 move checkmate)
Just played a blitz game where my opponent tried to use the Petrov's defense. It failed.

Petrov's defence fail(10 move checkmate)

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For those who don't know the Petrov defense is when you play 1.e4 e5 2.nf3 nf6

            After taking the pawn on e5 black should play d3 to push the knight back before                      taking the pawn on e4, this game explains why.

As you have probably noticed, I could have got checkmate on move 8 by playing Qd5. For some reason, I saw checkmate in 3 with the bishop first.

You can find a more detailed explanation of this game here: https://lichess.org/study/T873Y1sF