Attacking the d6-pawn to force the compromising ...e6-e5 advance.

Both
1...Qxc4 2.Bxd6 Bxd6 3.Qxd6
and
1...Ne5 2.Nxe5 Bxg2 3.Nxf7! Kxf7 4.Kxg2 Qxc4 5.Rac1
yield White a more comfortable game.

Now White has a pleasant advantage thanks to the weaknesses on d5 and d6.

In order to swap Black's "good" bishop.

Black is never able to launch the ...b6-b5 counter-strike.

With an overwhelming positional advantage.

Provoking f2-f3 in order to soften up the dark squares around the white king.

Clearing the g1-a7 diagonal for the bishop.

Now the knight on g3 becomes exposed;

4.Be3 d2! 5.Qcd2 Ne5 -+