[Event "California"] [Site "California"] [Round "0"] [White "Essen"] [Black "Duff"] [Result "1-0"] [ECO "C22"] [Opening "Centre Game: Paulsen Attack"] 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 b6 5. Nc3 Bc5 6. Qg3 g6 7. Nd5 d6 8. Bg5 f6 9. Qc3 Ne5 10. b4 fxg5 11. bxc5 bxc5 12. Nf3 Nf7 13. Nxg5 Ngh6 14. Bb5+ Bd7 15. Ne6 Qc8 16. Qf6 Ng8 17. Qe7+ Nxe7 18. Nf6# 1-0