[Event "Interzonal-11b"]
[Site "Rio de Janeiro"]
[Date "1979.10.14"]
[Round "16"]
[White "Petrosian, Tigran V"]
[Black "Shamkovich, Leonid Alexandrovic"]
[Result "1/2-1/2"]
[WhiteElo "2610"]
[BlackElo "2495"]

1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. c3 Bg7 5. d4 cxd4 6. cxd4 Qb6 7. e3 Nf6 8. O-O d5 9. Nc3 O-O 10. Ne5 e6 11. Nd3 Qd8 12. b3 b6 13. Re1 Ba6 14. Bb2 Rc8 15. Qd2 Qe7 16. Rac1 Rfd8 17. Bf1 Ne4 18. Qd1 Bb7 19. Ne2 Qe8 20. f3 Nd6 21. Qd2 Ne7 22. g4 Rxc1 23. Rxc1 Rc8 24. Ne5 Rxc1 25. Qxc1 Qc8 26. Qxc8+ Nexc8 27. Nf4 Bf6 28. Be2 Be7 29. Kf1 f6 30. Ned3 Kf7 31. Ke1 g5 32. Nh5 Bc6 33. Kd1 Nb5 34. a4 Nc7 35. Bc3 a5 36. Be1 Nd6 37. Ng3 h6 38. Bf1 Bb7 39. Bc3 Ke8 40. Nf2 Nf7 41. Bd3 Kf8 1/2-1/2