The most precise and effective.

On 30.Rxf4, there follows 30...Ng3+.

White resigned.

Both players believed that the capture...

was impossible. In the game, Black retreated with 22...Qb4, and after 23.Nd3 Qe7 24.Bc1!, White retained the advantage of the two bishops, which he confidently realised.
It seems that after...

the threat of Nc1-a2 is irresistible, but there is the unexpected...

The slumbering rook bursts into the game with great effect. Now, after any jump by the knight, Black wins with ...Ra6- b6. White has to play 25.d5, but Black has a clear advantage, as the exchange is the exchange.

Preparing the advance of the a-pawn is problematic, as the black queen stands in the way. Suddenly, Black instead activates his most passive piece, which seemed to have no particular prospects:

Shocked, White chooses the path of least resistance and loses quickly. It was essential to give the king some air with 24.Rcd1.
Incidentally, it is bad to play 24.Bxb5 axb5 25.Rcd1 Ra8 – Black’s attack develops of its own accord.

There is no defence to the rook’s transfer to the b-file. White resigned.