[Event "Chigorin Memorial-06"]
[Site "Sochi"]
[Date "1966.??.??"]
[Round "4"]
[White "Bertok, Mario"]
[Black "Sergievsky, Vladimir D"]
[Result "0-1"]

1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. d5 Be7 6. Nge2 Nc5 7. f3 a5 8. Be3 O-O 9. Qd2 Ne8 10. g4 c6 11. Ng3 Nc7 12. O-O-O N7a6 13. h4 a4 14. Kb1 Qa5 15. dxc6 Nb3 16. axb3 axb3 17. Qd5 Nc5 18. Kc1 Qa1+ 19. Nb1 Ra2 20. Rh2 bxc6 21. Qd2 Na4 22. Qf2 d5 23. exd5 Rxb2 24. Qxb2 Nxb2 25. Rxb2 Ba3 26. Rd2 cxd5 27. c5 Be6 28. Bb5 Rb8 29. Bd3 d4 30. Bf2 Rc8 31. Ne4 Bd5 0-1