16...Rh6 17.g3 Qf3 18.Rd3 Qh5 19.h4 g5! 20.Rxd6

The best chance was 20.e5!, trying to organise counterplay on the dark squares. Admittedly, after 20...d5! 21.Qe7 gxh4
22.Ne4 Bf5 23.Nf6+ Rxf6 24.Qxf6 Bxd3 25.cxd3 Re8 26.d4 hxg3 27.fxg3 Re6, Black has an extra pawn for no compensation.

White resigned.

Black is somewhat behind in development, and his Ba7 needs time to get into play. Therefore, White opens additional lines:

This attempt to bring his dark-squared bishop to life takes too much time, but after 18...d4 19.Na4, Black also has a difficult position – White threatens to play f4-f5, cramping Black over the entire board. In the future, the white knight will transfer via b2 to b4, after which, for example, he can unhurriedly prepare the advance of the g-pawn.

Here, the prophylactic 20.Kh1 looks promising (20.Bc4 was played in the game), but the energetic...

looks even stronger. After the forced:

20...cxb4+ 21.Kh1 Qxe5 (or 21...Ng4 22.d6 Qe8 23.Ne4, with powerful centralisation) 22.axb4 cxd5 23.Nxd5! leads to a decisive advantage for White – the black queen is attacked wherever she goes

White retains good winning chances.

White has placed his hopes on the dark-squared bishop, which attacks g7 and helps the blockade of the b-file. In one blow, Black solves both problems:

Very risky, but even after 19.Bxb6 Qxb6 20.Qxc4 Bh4+ 21.Ng3 Bf6, the black initiative more than compensates for the sacrificed exchange.