Weakening the a2-g8 diagonal, but it was not easy to find a constructive plan.

White later realized his material advantage.

This exchange sacrifice completely changes the logic of the position. Now the threat is 2 Bf4.

This lets the white knight occupy the newly created post on e5.

2...Nd7 3.Bxh6 Re8 was preferable, when 4.Bd3 Nb6 5.Ne5 Nxd5 6.Be4 keeps a clear initiative.

Now d5-d6 is inevitable.

Black resigned.

Restricting the knight on h6.

1.e6? Nf5! 2.Qc2 g6 with counterplay for Black, whose knight has an excellent destiny on d4.

Preparing ...Rd4.