[Event "Chigorin Memorial-06"]
[Site "Sochi"]
[Date "1966.??.??"]
[Round "10"]
[White "Bertok, Mario"]
[Black "Ortega, Lexy"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 O-O 5. a3 Be7 6. e3 c5 7. Bd3 b6 8. O-O d5 9. b3 Bb7 10. Bb2 Ne4 11. Qe2 Nd7 12. Rfd1 f5 13. Rac1 Qe8 14. cxd5 exd5 15. Ba6 Qc8 16. Bxb7 Qxb7 17. Nf1 Rad8 18. Rc2 a5 19. a4 Nb8 20. Ne5 Na6 21. f3 Nf6 22. Nd3 Nb4 23. Rcc1 Rc8 24. Ba1 Nd7 25. Nf4 g6 26. Qb5 Bf6 27. Ne6 Rf7 28. dxc5 Bxa1 29. c6 Nxc6 30. Rxa1 Nb4 31. Rac1 Re7 32. Nd4 Nc5 33. h4 h5 34. Rd2 Rce8 35. Rc3 Kh7 36. g3 Qc7 37. Kg2 Qd6 38. Qe2 Qf6 39. Qd1 f4 40. gxf4 Qxh4 41. Kg1 Qf6 42. Rg2 Ne6 43. Nb5 d4 44. Nxd4 Nxd4 45. Qxd4 Qxd4 46. exd4 Nd5 47. Rc6 Nxf4 48. Rd2 h4 49. d5 Re5 50. Rc7+ Kh6 51. d6 Rd8 52. d7 Rd5 53. Rxd5 Nxd5 54. Rb7 Kg5 55. Nd2 Kf4 56. Kh2 g5 57. Kh3 Kf5 58. Nc4 Kf4 59. Nxb6 Nxb6 60. Rxb6 Rxd7 61. Rf6+ Ke5 62. Ra6 Kf4 1/2-1/2