Or 4.Ng3 Bxg3! , followed by ...Ne5.

Thus Black avoids a fork on f5 before completing the knight maneuver.

With better placed pieces and a strong passed pawn, Black has a clear advantage.

By attacking the h7-pawn, the knight gets to d6 with tempo.

After 2...Nxe5? 3.Nd6 White wins a piece.

Thanks to his powerful knight on d6 White is clearly better.

Creating a protected square for the knight on d4.

3.Rd2 Nd4 4.Nxd4?! exd4 5.Qd3 f5 6.Re1 Rde8-/+

Swapping the strong enemy knight. Unfortunately for White, he can't do the same thing.

7.h4 intending Bh3 was preferable.