Removing the king from the vulnerable a2-g8 diagonal in advance.

2.Ng3 Qd1+ 3.Qxd1 Rxd1+ 4.Kf2 Nb3 yields Black considerable counterplay.

Thanks to the clever 1...Kf8 Black is not in check at this point and can continue with active measures.

With an active queen Black has no problems.

Provoking ...f7-f5 in order to open the a2-g8 diagonal towards the black king.

With the threat of 4 Be5+, winning a piece.

5...Rxd6 6.Be5+! Kh7 7.Rxb7+ +-

and Black resigned in view of Be5+ on the next move.

Provoking a decisive weakness in the white pawn structure.