[Event "Interzonal-11a"]
[Site "Riga"]
[Date "1979.09.11"]
[Round "6"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Mednis, Edmar John"]
[Result "1/2-1/2"]
[WhiteElo "2390"]
[BlackElo "2510"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. e5 Nd5 7. d4 cxd4 8. cxd4 O-O 9. Nc3 Nc7 10. Bf4 Nxb5 11. Nxb5 a6 12. Qa4 d6 13. exd6 Bg4 14. Nc7 Bxf3 15. Nxa8 exd6 16. gxf3 Nxd4 17. Be3 Nxf3+ 18. Kg2 Nh4+ 19. Kh1 Nf5 20. Bb6 Qxa8 21. Rad1 Qc8 22. Rfe1 Bxb2 23. Rd3 Bf6 24. Kg1 Be5 25. Kh1 Kg7 26. Ra3 h5 27. Qe4 Bf6 28. Kg1 Qd7 29. Qa4 Qxa4 30. Rxa4 Rc8 31. Rb1 Rc6 32. Kf1 Ne7 33. Bd4 b5 34. Bxf6+ Kxf6 35. Rf4+ Nf5 36. a4 bxa4 37. Rxa4 Kg5 38. Rba1 Kf6 39. Rxa6 Rxa6 40. Rxa6 Ke6 41. Ke2 Ke5 42. Ra7 f6 43. Ra8 Nd4+ 44. Ke3 Ne6 45. Re8 g5 46. Re7 h4 47. f4+ gxf4+ 48. Ke2 h3 49. Ra7 Ng5 50. Ra3 d5 51. Ra5 Ke4 52. Ra6 Ke5 53. Ra5 Ke4 54. Ra6 Nf3 55. Rxf6 Nxh2 56. Re6+ Kf5 57. Rd6 Ke5 58. Rd8 d4 59. Rh8 f3+ 60. Kf2 Kf4 61. Rf8+ Ke4 62. Re8+ Kf4 63. Rf8+ Ke4 64. Re8+ Kd5 65. Rd8+ Kc4 66. Rc8+ Kb3 67. Rd8 Kc3 68. Rc8+ Kd2 69. Rh8 Ng4+ 70. Kxf3 Nf6 71. Rxh3 Kd3 72. Rh4 Kc4 73. Rxd4+ 1/2-1/2