[Event "Petropolis Interzonal"] [Site "Petropolis BRA"] [Date "1973.08.16"] [Round "16"] [White "Peter Biyiasas"] [Black "Werner Hug"] [Result "1-0"] [WhiteElo "?"] [BlackElo "?"] [Variant "Standard"] [TimeControl "-"] [ECO "B40"] [Opening "Sicilian Defense: French Variation"] [Termination "Unknown"] [Annotator "lichess.org"] 1. Nf3 c5 2. e4 e6 { B40 Sicilian Defense: French Variation } 3. Nc3 Nc6 4. Bb5 Nge7 5. O-O a6 6. Bxc6 Nxc6 7. d4 cxd4 8. Nxd4 Be7 9. Nxc6 dxc6 10. e5 O-O 11. Qe2 Qc7?! { (0.44 → 1.20) Inaccuracy. c5 was best. } (11... c5) 12. Bf4 c5 13. Ne4? { (1.38 → 0.19) Mistake. Qg4 was best. } (13. Qg4) 13... Qc6? { (0.19 → 1.39) Mistake. Bd7 was best. } (13... Bd7 14. Rfd1 Bc6 15. Nd6 Bxd6 16. Rxd6 Rfd8 17. Qe3 Rxd6 18. exd6 Qb6 19. b3 Bd7 20. Qg3) 14. Rad1 b6 15. Bg5 Bxg5?! { (1.43 → 2.37) Inaccuracy. Bb7 was best. } (15... Bb7) 16. Rd6 Qc7?! { (2.25 → 3.25) Inaccuracy. Qb7 was best. } (16... Qb7 17. Nxg5) 17. Nxg5 Bb7 18. Qd3 g6 19. Rd1 Bd5?! { (4.10 → 6.07) Inaccuracy. Qe7 was best. } (19... Qe7 20. f4) 20. c4 Bc6 21. Qh3 h5 22. Nxe6 { White wins. } 1-0