[Event "URS-ch40 Semifinal"]
[Site "Odessa"]
[Date "1972.08.??"]
[Round "?"]
[White "Zaitsev, Igor A"]
[Black "Ruderfer, Mark B"]
[Result "0-1"]
1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 d5 6. Nxe5 dxe4 7. Nxc6 Qg5 8. Qe2 Nf6 9. f4 Qh4+ 10. g3 Qh3 11. Ne5+ c6 12. Bc4 Bc5 13. d4 Bxd4 14. Be3 Bxe5 15. fxe5 Bg4 16. Qf1 Qxf1+ 17. Rxf1 Nd5 18. Bd4 b6 19. c3 Ke7 20. Kd2 Rad8 21. b4 Bf3 22. a3 Rd7 23. Rae1 Rhd8 24. Kc2 g5 25. Be2 Rf8 26. Bxf3 exf3 27. Kd3 Ke6 28. Ke4 g4 29. h3 c5 30. bxc5 bxc5 31. Bxc5 Nxc3+ 32. Ke3 Nd5+ 33. Ke4 Rc8 34. Bd6 Rc4+ 35. Kd3 Rc3+ 36. Kd4 gxh3 37. Re4 Rg7 38. Rh4 h5 39. Bb4 Rb3 40. Rxh5 Rg4+ 41. Kc5 Nxb4 42. axb4 Re3 43. Rxh3 Rxe5+ 44. Kc6 Rc4+ 45. Kb7 Rxb4+ 46. Ka8 Re3 47. Rh8 Kf5 48. Rh5+ Kg6 49. Rh8 Rbe4 50. Kxa7 Rb3 51. Ra1 f2 52. Rh2 f1=Q 0-1