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.

Another promising possibility is 19...Bd7, preparing the transfer to the b-file of the Rf8.

White will not manage to get the knight to d5, which means that he faces a difficult defence.

And Black realised his advantage over time.

Thanks to the fact that the black rooks are stalemated on the kingside, White has possibilities to open the game, without refraining from possible sacrifices:

31...Nxb4 32.Rb3+–.

White chooses a prosaic way to realise his advantage. More energetic, stronger and simpler was 36.Rxd5 Re8 37.Rxf5+–.