This move does not leave Black any hope of resistance.

29...Rxc3 30.Qxe6+ Kh7 31.Rd5 Qe8 32.Qxf5++–.

Black resigned.

The knight is an agile piece, and the X-ray on the long diagonal allows a tactical idea that was seen in the game:

Black must lose the exchange, after which the realisation is a simple matter of technique.

29...Bxb2 30.Ne7+ Kg7 31.Nxc8 Qf5 32.Nd6 Qf3+ 33.Kg1 Be5 34.Qc2 h5 35.h4 Qg4 36.Kg2

Repeating moves to save time before the time-control, a typical device that is useful to employ sometimes.

Nor are there any chances from 37...Bxg3 38.fxg3 Qxg3+ 39.Qg2 Qxe3+ 40.Qf2+–.

Black resigned.

The knight and bishop are unstably placed, and understanding this allowed Black to find a long queen move:

White must lose a piece.