unsound sacrifice declined wins 5th game

[Event "ICC"]
[Site "Internet Chess Club"]
[Date "2009.12.15"]
[White "nhkatz"]
[Black "puma"]
[Result "1-0"]
[WhiteElo "1325"]
[BlackElo "1351"]
[ECO "B15"]
[Opening "Caro-Kann"]
[Variation "Rasa-Studier gambit"]
[TimeControl "120+6"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. f3 exf3 5. Nxf3 Nf6
6. Bc4 e6 7. O-O Be7 8. Bg5 b6 9. Ne5 O-O 10. Bd3 Bb7
11. Bxf6 Bxf6 12. Be4 Qc7 13. Rxf6 g6
1-0