The Nd4 is pinned, which gives rise to a tactical motif:

First, increasing the pressure and forcing the Nd6 to leave its active position. The immediate 31...Be2, with the same idea, was also possible, but after 32.Rxc5 Bxd1 (on 32...Qxc5, there also follows 33.N6f5) 33.N6f5, the position remains dynamic, and the realisation of the advantage is more difficult. In the game, Black played very poorly, not even trying to exploit the pin, and after 31...Ne4 32.Nxe4 dxe4 33.Nf5 Rxa2, a double-edged position arose.

Because of the back-rank mate, retreating to d2 is impossible, and so White loses material. After

White has to surrender the exchange:

Black is winning easily.

Black is insufficiently developed, and this circumstance allows White to land a tactical blow:

The knight cannot escape from the pin without serious material losses.

On 17...f6 or 17...Ke7, there follows 18.Rac1.

Is Black defending? No, his pieces are tied up, and White has a pair of passed pawns, which are ready to promote.

He has to bring the rook into the game in this way, but Black does not solve his problems.