Did I make a mistake?

After I moved Qxc7, I was sure this was a mistake, leaving h1 vulnerable to the double coverage on the diagonal, but I ended up mating 2 moves later. What would his correct move been to prevent the mate, and did I make the correct move?



Game 4247479




[Event "Challenge"]
[Site "http://www.redhotpawn.com"]
[Date "2007.11.09"]
[EndDate "2007.11.09"]
[Round "?"]
[White "0ddity"]
[Black "hungarianbarbarian"]
[WhiteRating "1573"]
[BlackRating "1000"]
[Result "1-0"]
[GameId "4247479"]

1. b3 Ng8f6 2. Bc1b2 b6 3. Nb1a3 Bc8b7 4. c4 d5 5. Qd1c2 g6 6. cxd5 Qd8xd5
7. Qc2xc7 Qd5xg2 8. Bf1xg2 Bb7xg2 9. Qc7c8 1-0

Originally posted by 0ddity
After I moved Qxc7, I was sure this was a mistake, leaving h1 vulnerable to the double coverage on the diagonal, but I ended up mating 2 moves later. What would his correct move been to prevent the mate, and did I make the correct move?



Game 4247479




[Event "Challenge"]
[Site "http://www.redhotpawn.com"]
[Date "2007.11.09"]
[EndDate "2 ...[text shortened]... . Qd1c2 g6 6. cxd5 Qd8xd5
7. Qc2xc7 Qd5xg2 8. Bf1xg2 Bb7xg2 9. Qc7c8 1-0

I would have, but I like Larsen's opening, and it ended quicker then I expected.

Originally posted by 0ddity
After I moved Qxc7, I was sure this was a mistake, leaving h1 vulnerable to the double coverage on the diagonal, but I ended up mating 2 moves later. What would his correct move been to prevent the mate, and did I make the correct move?



Game 4247479




[Event "Challenge"]
[Site "http://www.redhotpawn.com"]
[Date "2007.11.09"]
[EndDate "2 ...[text shortened]... . Qd1c2 g6 6. cxd5 Qd8xd5
7. Qc2xc7 Qd5xg2 8. Bf1xg2 Bb7xg2 9. Qc7c8 1-0

Originally posted by renegade hotspur
I think you needed 7.......Qd7. Unless someone can find better.

Renegade