[Event "URS-ch39 Semifinal"]
[Site "Daugavpils"]
[Date "1971.06.??"]
[Round "?"]
[White "Katalymov, Boris N"]
[Black "Gipslis, Aivars P"]
[Result "1/2-1/2"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. c4 Nb6 6. Be2 Bg7 7. exd6 cxd6 8. O-O O-O 9. a4 a5 10. Na3 d5 11. c5 N6d7 12. Nb5 b6 13. cxb6 Qxb6 14. Bf4 Na6 15. Re1 Bb7 16. Ra3 Rfc8 17. Re3 Bf8 18. Ng5 Nf6 19. Bg4 Rc6 20. Rxe7 Bxe7 21. Rxe7 Rf8 22. Bd7 Nxd7 23. Rxd7 Bc8 24. Rxd5 Nb4 25. Rd6 Rxd6 26. Bxd6 Re8 27. h4 h6 28. Bc7 Qc6 29. Nxf7 Kxf7 30. Nd6+ Kf8 31. Nxe8 Kxe8 32. Bxa5 Nd5 33. Bd2 h5 34. Qe2+ Kf7 35. Qe5 Bb7 36. a5 Ne3 37. f3 Nxg2 38. d5 Qxd5 39. Qxd5+ Bxd5 40. Kxg2 Ke6 41. b4 Kd7 42. b5 Bc4 43. b6 Kc6 44. Kf2 Kb7 45. Ke3 1/2-1/2