Redirecting the idle knight to h6, where it will be helpful in exploiting in the complex of weak squares on g4, f5 and e4.

Challenging the main defender of the e4-square.

After 5.Bxf5 Nhxf5 , followed by ...Ne4+, White also has a hard time.

After seizing the centre Black starts a flank attack.

A tactical oversight. White should have accepted long-term inferiority after 7.fxg5 fxg5 8.hxg5 Nxg5.

Black wins material, and soon the game as well.

Preparing Nd2-b3 in order to seize the protected square on c5. This is the best way to do it, since the temporary attack on the c6-pawn limits Black's replies.

By recapturing this way White keeps the c5-square under control and facilitates the attack on the c6-pawn.

Thanks to his superior pawn structure, White keeps a slight edge.