The position has an unclear character. If Black manages to stabilise and strengthen his position, he will hardly be worse. White needs to play energetically.

The decisive mistake.
Black could maintain equality in the complications after 25...gxh6! 26.Bxe4 Nd2!. There are many variations here, but there seems to be no advantage for White in any of them.

An extremely important zwischenzug, which wins for White.
It was not too late to step on a hidden mine with 27.Bg5? g6!. Here, it is Black who plays the zwischenzug, after which he is simply better.

28...Qe5 29.Bd3+–.

Black must part with material.

Black resigned.

The only move to maintain equality was the zwischenzug 28...e2!. A draw is achieved after 29.Re1 (29.Rd7+?! Qxd7! (not 29...Kf8? 30.bxc7 e1=Q+ 31.Bf1 Re8 32.Rf4! Bxf4 33.Qxf4 Qe6 34.Rd8 Kg7 35.c8=Q Qxc8 36.Rxc8 Rxc8 37.Bd3+–; 29...Nxd7 30.Qf7+ Kd6 31.Qd5+ Ke7 32.Qf7+=) 30.Qxe5+ Kf8 31.Qxb8+ Ne8 32.Bxe2 Qxa4 33.b7 Qb4 34.Bh5 Re6 35.Kh2 Re7 36.Bf3³) 29...Rxb6 30.Rxe2 Nd7 31.Rd2 (31.Qf7+ Kd8 (31...Kd6 32.b4!!+–) 32.Ra8+ Rb8 33.Rd2 Bd4 34.Re2 Be5=) 31...Bd4 32.Re2+ Be5 33.Qf7+ Kd8 34.Ra8+ Rb8 35.Rd2 Bd4 36.Re2=. The two sides cannot avoid a repetition of moves.

A gift of fate.
White misses the simple win 29.Ra7! Qxa7 30.Qxe5+ Kf8 31.Rd8+ Kg7 32.Rg8+ Kh6 33.Qf4+ Kh5 34.Be2++–.

White resigned.

White has the advantage, but the tactical solution is rather unusual.