The bishop shifts to the more promising h1-a8 diagonal.

With ideas like 8...Bf3, winning the battle for the d-file. By now the range of the bishop pair is rather worrying for White, whereas the knights are lacking protected squares. Black later won.

Intending ...b5-b4 to weaken the a1-h8 diagonal for the bishop, in particular the d4-square.

Now the bishop is doing a great job in helping his colleague to put pressure on g2.

And subsequently won the game.

Giving up the bishop pair in exchange for another advantage: a weak enemy pawn on d6.

Or 2...Qxh4 3.gxh4 and the d6-pawn falls right away.

After 4...Nc6 5.Bc7 that pawn is also doomed.

White wins a pawn with a decisive advantage.