[Event "Interzonal-11a"]
[Site "Riga"]
[Date "1979.09.11"]
[Round "6"]
[White "Gruenfeld, Yehuda"]
[Black "Gheorghiu, Florin"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2540"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. c4 g6 8. Nc3 Bg7 9. Be3 O-O 10. Rc1 Nbd7 11. Qe2 d5 12. Nb3 dxe4 13. Nxe4 Qc7 14. Nxf6+ Nxf6 15. Bd4 Nh5 16. Bxg7 Kxg7 17. Rfd1 Bd7 18. Qe3 Ba4 19. Bf1 Nf6 20. g3 Rad8 21. Rxd8 Rxd8 22. Nc5 Bc6 23. b4 Qe7 24. a4 Ng4 25. Qc3+ Qf6 26. Qxf6+ Nxf6 27. b5 axb5 28. axb5 Be4 29. Bg2 Bxg2 30. Kxg2 b6 31. Na4 Rd6 32. c5 bxc5 33. b6 Nd7 34. b7 Nb8 35. Rxc5 Rd7 36. Rb5 Kf8 37. Rb4 Ke8 38. Nc5 1/2-1/2