[Event "Interzonal-11a"]
[Site "Riga"]
[Date "1979.09.09"]
[Round "4"]
[White "Gruenfeld, Yehuda"]
[Black "Mednis, Edmar John"]
[Result "1-0"]
[WhiteElo "2430"]
[BlackElo "2510"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. c3 c5 6. Bd3 b6 7. Nh3 Ba6 8. Bxa6 Nxa6 9. O-O Nc7 10. Qg4 Qc8 11. Nf3 Qa6 12. Nf4 g6 13. Ng5 Be7 14. h4 Nf8 15. h5 Qa4 16. dxc5 bxc5 17. b3 Qc6 18. Bd2 Rg8 19. h6 Rd8 20. Rfe1 Rd7 21. Nfh3 Na8 22. Qf4 Bd8 23. Re3 Nb6 24. Rf3 Qc7 25. Rd1 Qb7 26. Bc1 Nc8 27. Ba3 Rc7 28. Qa4+ Qc6 29. Qxc6+ Rxc6 30. Rxf7 Rh8 31. Rg7 Nd7 32. Re1 Ra6 33. Bc1 Rxa2 34. Nxe6 Ba5 35. Nhg5 Bxc3 36. Nc7+ 1-0