Heartbreak for Dubov

[FEN "7Q/2p1q3/7p/pB2rkp1/4R3/P1P5/P4PPK/3r4 w - - 0 32"]
32. Qc8+ {In the actual game Dubov played f3 to hold the Rook and lost.} 32... Kg6 33. Qg8+ {Qg7 then QxQ+ and RxR. Or Kh5 when Be2+ Mates Black.} 33... Kf6 34. Qh8+ Kg6 35. Qg8+ Kf5 36. Qc8+ {Now we see what would have happened if Gujrathi had taken the Rook.} 36... Kxe4 37. Qg4+ Kd5 38. Qc4+ Kd6 39. Qc6# {All that was forced ending in a Dovetail Mate.}