The weakness of f7 is obvious, and a small combination tempting:

More tenacious is 23...Kxf7, although after 24.Rxa5 Qc6 25.Rxa8 Rxa8 26.Bxd6 cxd6 27.Qe2, White should win – the black king is exposed, and the pawns on d6 and b5 are vulnerable.

The bishop is stronger than the knight, and the major pieces are more active – White easily organises a decisive attack.

The march of the h-pawn is also threatened, so Black resigned.

A standard, though very strong sacrifice.

After 20...Qxd4, White wins by 21.Qxd4! Bxd4 22.Bxe6 Rxf7 23.Bxf7+ Kxf7 24.Rc7 Bf6 25.Bc3 Re8 26.Bxf6 Kxf6 27.Rxb7±.

Bad is 21...Qxd4 22.Qxd4 Bxd4 23.Rxe7+–.
Black had counted on the pin, but...

A brilliant queen sacrifice.

For the queen, White has rook, bishop and two pawns, but Black’s biggest problem is the weakness of g7. The attack is unstoppable.