[Event "Interzonal-11a"]
[Site "Riga"]
[Date "1979.09.14"]
[Round "7"]
[White "Ribli, Zoltan"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1/2-1/2"]
[WhiteElo "2595"]
[BlackElo "2390"]

1. c4 c5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7 6. d3 e5 7. a3 Qd7 8. Be3 Nc6 9. Rc1 Ne6 10. Nf3 Rb8 11. O-O f5 12. Na4 b6 13. b4 Bb7 14. bxc5 b5 15. Nc3 a6 16. Qb3 Bxc5 17. Bxc5 Nxc5 18. Qa2 Ne6 19. Nd5 Qd6 20. h4 Ncd8 21. Ng5 Nxg5 22. hxg5 h6 23. e4 Bxd5 24. Qxd5 Qxd5 25. exd5 Kd7 26. g6 Rf8 27. Rfe1 Kd6 28. Rc2 a5 29. Rce2 b4 30. axb4 axb4 31. Rxe5 b3 32. f4 Rf6 33. Kf2 b2 34. Rb1 Kc5 35. Re2 Rfb6 36. Rc2+ Kd6 37. g4 fxg4 38. Kg3 Rb4 39. Be4 R8b6 40. f5 Ke5 41. Kxg4 Nb7 42. Rc7 Nd6 1/2-1/2