Most likely White had taken this move into account, but missed something further on.

15.Qh5 hxg5 16.Bxg5 Nf6 17.Qh4 Re6.

White has insufficient compensation.

Very imaginative! Black has not castled, yet the capture of this pawn will speed up an initiative on the kingside.

Too slow. 20...h5!? 21.g6 f5.

Oops.

On 22...Rxh6 23.Qg8+ Bf8 24.Nf5 wins back the rook, preserving a much better position.

White should have had a winning advantage, but his much higher-rated opponent eventually escaped with a draw.