Good puzzle; good day.

Yes, I'm pretty sure that happened to me.  But I must confess that Qxf4 was NOT MY FIRST try (I tried checking with the Queen and with the Knight before I tried that).  But I was pretty sure that I had already tried it when finally "help" told me that was the correct first move.

Edit:  AFTER 1. ...  exf4, the rest of the line was very clear and easy.  It was that first move that had me stumped - especially after I had my every try (Including, I'm pretty sure, 1.Qxf4) rejected.

tough for a mate in 3

Tough

nice

very nice

i agree with jenningsnickolas;

Another possible solution:

1.Nxf4+ exN [.. Kh4 2.Rg4+#]

great!

a little tricky!

cool  

Decent.

SZ.

another queen sack, variety would be good for a change....

nice

Queen sac - good one!

I'm going to be honest: that took me about 30 minutes.  Excellent puzzle in my opinion.

hard

nice work!

1.Nxf4 is very tempting because it checks the black king & I nearly tried it. But if you reverse white's first two moves, it leaves the e-file open for 2...Qe7+ & that blows white's attack apart (3...g5 ?).
Non-checking moves always make me a little uneasy but 1.Qxf4  is the correct one here.