2 Knights for Black

I like 2 Knights defense, both for white and black. Engine finds my mistakes, but I am not sure they are mistakes...

lichess.org/study/yEabMvW5/83NE85S7.pgn

In this game you were winning after 8 Ba4. You played well and the so called mistakes did have no consequence at all since your position was winning by such a large margin.

@tpr Thanks. I know that 8 Ba4 is a weak move, but I doubt I can win the position after this move against Stockfish.

You should be able to win this, even against Stockfish. If you doubt it, then try. Converting a piece advantage is basic technique. If you cannot win with piece odds, then you should train it.

I love the two knights, you get a lot for the pawn.

Instead of qd4 you want to play bd6 and qc7 for a battery and put your rook on d8 for a pin on their pawn when they move it to d3.

"Engine finds my mistakes, but I am not sure they are mistakes..."

Hmmm

@Dangerouskid Qd4 is by far the best move, winning a piece. This variation of the Polerio Defence is unusual in that Black has simple forcing moves to win material, rather than just more activity and a more free position.

I was meaning after the be2 line, instead of ba4.

Those are mistakes at higher depths. If the opponent played perfectly, which is not the case mostly. So engine perfect moves are not always useful for improvement.