So I did. And I shouldn't have won when I did, I don't think - would 21 Qe6 have been a better move on black's part, or am I missing something? Hope I got the notation right, I'm kind of new to this.
Edit: I did get the notation wrong - I think I mean 21 Qg6
I told myself I'd post my first game to try out the forums... but as I won now I feel like rather a blaggart for doing it.