In this case, the zwischenzug helps Black equalise.
A) 13...cxd5?! 14.Bxg7 Kxg7 15.bxc4+=
B) 13...Qd6?! 14.Bxg7 Kxg7 15.bxc4+=

Black even temporarily wins a pawn.

Draw, because the variation 19...Qxe2 20.Rxe7 Qxa2 21.Qxb7 Rab8 22.Qxa7 Qxa7 23.Rxa7 Rxb3, leads to a complete elimination of the fighting forces.

White is to move, and Black has a knight under attack.

It turns out that we can first attack the queen, creating in the process the deadly threat 18.Qxc4+. In the game, there followed 17.Qxf5 Qd5 18.Qf3 Qxf3 19.Nxf3 Bf6, with Black having sufficient compensation for the pawn. After:

Thanks to the pin on the bishop, the c4-pawn is lost as well. White is winning.

If we now simply take the bishop, then White’s advantage in the opposite-coloured bishops position will be minimal. Instead, White sees a tactical motif, connected with the unstable position of the black rook and the insufficiently protected black king on h8.

Even more precise than 25.Rxb7 g6.

Black resigned.

With his last move, Black exchanged the light-squared bishop on d3. Everything would be fine for him if White had to take back on d3, but there followed the zwischenzug: