[Event "Olympiad-25"]
[Site "Luzern"]
[Date "1982.10.30"]
[Round "1"]
[White "Chia, Chee Seng"]
[Black "Koenders, Etienne"]
[Result "1-0"]
[WhiteElo "2270"]

1. Nf3 Nf6 2. c4 c5 3. g3 g6 4. Bg2 Bg7 5. d4 cxd4 6. Qxd4 Nc6 7. Qd3 O-O 8. O-O d6 9. Nc3 Nb4 10. Qd2 Bg4 11. Rd1 Qc8 12. b3 Nc6 13. Bb2 Rd8 14. Rac1 Qd7 15. Nd5 Ne4 16. Qc2 Bxb2 17. Qxb2 Qf5 18. Ne3 Qf6 19. Qxf6 Nxf6 20. Nxg4 Nxg4 21. h3 Nf6 22. Nd4 Rac8 23. Rc2 Nxd4 24. Rxd4 b5 25. Bb7 Rc5 26. b4 Rc7 27. Ba6 e5 28. Rdd2 bxc4 29. Rxc4 Rxc4 30. Bxc4 d5 31. f3 d4 32. Rc2 Rd7 33. Bb3 Kf8 34. Rc5 Re7 35. Rc6 Nh5 36. Kf2 f5 37. b5 Ke8 38. Be6 Rb7 39. a4 Ke7 40. Bd5 Rb6 41. Rc8 a6 42. Bc6 axb5 43. axb5 Nf6 44. Ke1 Kd6 45. Kd2 Kc5 46. Rd8 e4 47. g4 fxg4 48. hxg4 d3 49. g5 exf3 50. gxf6 f2 51. f7 f1=Q 52. f8=Q+ Qxf8 53. Rxf8 1-0