QGD exchange with black

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Morkph

im just starting to study this classic defence vs 1d4 at the moment im reading about lasker and tartakower variation but today i face an idea envolving f3-e4 in the exchange by white i've heard about it i think was botvitnik who invented it i mannaged to win the game but wasnt easy i was succesfull because my opponent was 100 rating points weaker i think here the game its just a blitz:




notmtwain

That 8.. Nf8 looks like the kind of move that should be punished.

Perhaps 12 Bxf6 Bxf6 13 Nf4 Bg6 14 Bxg6 Nxg6 15 Bxg6 fg 16 Qxg6+