Redirecting the passive bishop to the h3-c8 diagonal where it will complicate Black's long castling.

1...Nxg3? 2.Rh8 Bf8 3.Bh3 Qd6 4.Qe1! Ngh5 5.f4 , destroying the black defence

The game saw 2.Rh8+?! Bf8 3.Bh3 Qd6 4.f4 Nxd5 and Black eventually saved a draw.

Intending Qh5-h7, as well as 8 Qg4! followed by 9 Nf6. White has an overwhelming initiative.

Preparing Nd1-e3-f5.

Other moves, such as 2...b5 , can be answered in the same way.

If 3...Ne7 , covering f5, then 4.Rh5 f6 5.Qd1! followed by Qf1-h3.

Black resigned.

Intending 2...Ne5 followed by ...Nd3(+) or ...Nf3(+).