Nice!
My first Queen Sac, 4 move combo

Thanks. First time Fritz has ever given me " !! "-comments in the analysis. Not only one but on move 29,30 and 32.
Also very true what you said tonydal, I didn't see that alternative once I was fixed on the queen butchering idea to get the forced mate. Shame, would have been a nice tactics trainer problem otherwise as you said.
I played a so-so game and was almost losing to a blunder i made but then I got him cornered and mated him after a queen sac. Enjoy.