Ah ok, I assumed since the title of the puzzle was white to move and WIN that the puzzle would end in a win. It was a good puzzle, I wish I could see that far ahead in a game, it took me a cpl tries to get it!
I wish I see this kind of thing OTB. I'm not quite there yet. I was doing some puzzles last night and came across this one. I think its a great Removing the Guard type example. With the Queens nose to nose like that, it wasn't obvious to me to try and grab the pawn behind the Queen with check.
I was looking for a quick mate w/R,N,Bs but couldn't find one. It's clear in the end position W has a massive advantage with more material to come. Nice problem(puzzle)!