Black is winning.

Both sides have very exposed kings, but it is Black’s move and he has a queen pointing at the white king. The rook on f3 stops a deadly check on f2, so the solution is easy to find:

White resigned.

How can the rook ‘hurdle’ the knight and give a deadly check on d8? One needs to find the square where the knight will be most effective in the attack, even if that square is empty:

The knight is invulnerable (24...exf5 25.Qf6), and by comparison with other squares to which it could have jumped, from here it attacks g7 and e7.

It is clear that White needs to find a way to bring his queen to the h-file, but how can he do this, as his own bishop is in the queen’s way? The most convincing way is to remove the ‘unnecessary’ piece in such a way as to create additional threats:

The bishop puts itself en prise, but Black has no time to take it.

A) 25...Bb7 26.Qc4 Rd4 27.Nxf7+ Kg8 28.Qxe6+–;
B) On 25...fxg6, there follows 26.Qe4 or 26.Qg2.

Black resigned.