1...Kf5 2.Qd3++–.

Otherwise, the queen is lost. But what now?

Drawing the king into the trap.

5...Kxh4 6.Bf6#; 5...Kf5 6.Qf6+ Ke4 7.Qd4+ Kf5 8.Qd3++–.

Instead of the retreat of the bishop, there followed:

On 15.Be3?, Black had prepared 15...a4 16.Bd5 b4„.

On 15...hxg6, there is 16.Be3 a4 17.Bh6!. Opening the h-file has given White a large advantage.

After 16...Rxf7 17.gxf7+ Kxf7 18.Ne2! followed by Nxd4, the black king faces a difficult future.

17...h6? 18.Qxd6 b4 19.e5 Ng8 20.Ne4+–.
17...b4? 18.Qxf6 Qxf6 19.Rxh7#.