[Event "URS-ch39 Semifinal"]
[Site "Daugavpils"]
[Date "1971.06.??"]
[Round "?"]
[White "Karpov, Anatoly"]
[Black "Katalymov, Boris N"]
[Result "1-0"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 Bd7 7. Qd2 Nxd4 8. Qxd4 Qa5 9.
Bd2 e5 10. Qd3 Rc8 11. Bg5 Qb4 12. O-O-O Rxc3 13. bxc3 Qxe4 14. f4 Qa4 15. Re1 Ng4 16. Qc4
h6 17. Qxa4 Bxa4 18. Bh4 g5 19. h3 gxh4 20. hxg4 Bg7 21. Rxh4 Bd7 22. g3 Ke7 23. g5 Be6
24. c4 hxg5 25. Rxh8 Bxh8 26. fxg5 f6 27. Re3 fxg5 28. Rb3 b6 29. Ra3 a5 30. Rb3 e4 31.
Rxb6 Be5 32. Rb3 Bd4 33. Rb5 Bg4 34. Kd2 Bc5 35. Be2 Be6 36. Kc3 a4 37. Ra5 a3 38. Kb3 Kf6
39. Rxa3 Bxa3 40. Kxa3 Ke5 41. c3 Bd7 42. Kb4 Bc6 43. a4 Ke6 44. a5 Kd7 45. Kb3 e3 46. c5
dxc5 47. Kc4 Kd6 48. Kd3 Kc7 49. Kxe3 Kb8 50. Bf3 Ba4 51. Bd5 Ka7 52. Ke4 Ka6 53. Kf5 Kxa5
54. Kxg5 Bc2 55. g4 Ka4 56. Kf6 Ka3 57. c4 1-0