When calculating the variations at move 57, one must not only reach this position, but also see the following, quiet move, otherwise White actually loses!

Black is defenceless against the promotion of the white pawn, which means his position is lost. If even such a creative GM can pass by such a possibility, then for other players, working on finding such quiet, prophylactic, but important moves, must be something that is of enormous importance.

Active prophylaxis. Black defends his king against the threat of e4-e5, and wins an important tempo by the attack against d4.

On the passive 20.Rd1, Black continues to play on the dark squares with the move 20...Kf8! – the king goes to a safer square and defends the Re8, which is necessary for the threat of ...Nc6-b4.

The dark squares are creaking, and the queen faces a discovered attack.

This nice exchanging operation ensures Black a decisive advantage in the endgame.