A good exchange to facilitate an attack on the b7-pawn.

This leads to material losses;
Black should have tried 5...Ng4 , challenging the strong knight on e5.

With the inevitable threat of 11 Rcc8. White soon won.

Disputing the open file.

This doesn't help White, but it was difficult for him to find a constructive move.

Now Black's pieces are very active.

10.Rxc2 Qxc2+ 11.Kh1 Qe4+! with similar consequences.

White resigned.

Intending Rh3 with attacking prospects, as well as Rd3 to increase the pressure towards d6.

By a sensible knight manoeuvre Black managed to parry the Qh6+ threat, as well as any sacrifice with Nf5+. However, the knight is now passive on g8.