A strange decision, as now White will be two pawns down with the queens off. It is well known that opposite-colored bishops with the major pieces on the board favor the attacker. So White should have fearlessly gone for 30.Kg3 Qe5+ 31.Bf4.

White still has compensation due to the passive black pieces, but he loses track further on.

A mistake. White could have played 35.Rh8+ Rg8 36.Rxh5 with compensation.

Now Black gets rid of his weaknesses, while activating his rooks and preserving the h -pawn. He won on move 49.

Logically enough, a queen exchange can also be used as a defensive resource, putting an end to the opponent's attack. In the diagram position Black has some play on the light squares on the kingside, but:

White has found a safe way to increase his advantage.

Not the hasty 34.f3 Ng5 35.Kg2 Ne6.