Swapping Black's main defender of the light squares.

Thanks to his control of the open file and Black's light square weaknesses, White is clearly better.

Provoking g3-g4 in order to soften up f4 and the whole h2-b8 diagonal.

The only way of saving the d4-pawn.

Parrying the unpleasant threat of 5...Ne6.

Preparing ...Nh7-g5 in order to swap the defender on f3.

12.Nxg5 Qh2+ 13.Kf1 fxg5 with a decisive attack.

Black is winning.

Initiating an attack and provoking a weakness in the enemy pawn structure.