Black to play and get a very good position

lichess.org/G6Eq7SP0
p.s please send the ans to me in private chat

I guess there is another square for the knight.

I'm sure d4 is the best move

Calculated e/f?

@PurePremiumPenguin d4, loses the bishop right? It might be a blunder.

You missed the idea of d4 or see a refutation?

@SaNyob No, because you can set up a queen trap

d4, Qb7, Nd5 probably traps the queen after something like Rc7

d4.