[Event "Interzonal-11a"]
[Site "Riga"]
[Date "1979.09.19"]
[Round "11"]
[White "Tseshkovsky, Vitaly"]
[Black "Gruenfeld, Yehuda"]
[Result "1/2-1/2"]
[WhiteElo "2560"]
[BlackElo "2430"]

1. e4 c5 2. Nc3 d6 3. Nge2 Nf6 4. g3 e6 5. Bg2 Be7 6. O-O O-O 7. h3 Nc6 8. f4 Bd7 9. Kh2 e5 10. d3 Nd4 11. g4 Bc6 12. Nxd4 cxd4 13. Ne2 Ne8 14. c3 dxc3 15. Nxc3 Nc7 16. d4 Nb5 17. Ne2 Nxd4 18. Nxd4 exd4 19. Qxd4 Bf6 20. Qd3 Qb6 21. Rd1 Bxb2 22. Bxb2 Qxb2 23. Qxd6 Bxe4 24. Qd2 Qxd2 25. Rxd2 Bxg2 26. Kxg2 Rac8 27. Rd7 Rc2+ 28. Kg3 Rb2 29. Re1 a5 30. Re5 b6 31. Rb7 h6 32. Rxa5 bxa5 33. Rxb2 1/2-1/2