Redirecting the knight to a5 where it will eye the c6-pawn and help White to fight for the open a-file.

In order to open a second front with h2-h4.

With heavy pressure along the a1-h8 diagonal.

Heading for the blocking square on d6.

Now the knight isn't just blocking the d-pawn, it also attacks the weaknesses on c4 and e4.

Instead of grabbing the exchange, Black launches a counterattack.

10.gxf4 Qh4+ and the bishop is soon captured with check.

Winning a piece, and soon the game.