[Event "URS-ch37 Final"]
[Site "Moscow"]
[Date "1969.09.06"]
[Round "1"]
[White "Stein, Leonid"]
[Black "Zaitsev, Igor A"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 g6 6. Nc2 Bg7 7. e4 O-O 8. Be2 d6 9. O-O Bd7 10. Be3 a6 11. f3 Rb8 12. Qd2 Ne5 13. Nd4 Qa5 14. Nb3 Qd8 15. c5 Be6 16. Rfd1 Bxb3 17. axb3 dxc5 18. Bxc5 Qc7 19. Qe3 Bh6 20. Qf2 Nc6 21. Bb6 Qe5 22. g3 Qe6 23. Bc4 Qh3 24. Nd5 Nxd5 25. Rxd5 e5 26. Rad1 Bg7 27. Qf1 Qc8 28. Bc5 Rd8 29. Rxd8+ Nxd8 30. Ba7 Ra8 31. Bb6 Ne6 32. Rd6 Qf8 33. Qd3 Re8 34. Kg2 h5 35. Rd7 Re7 36. Qd5 Rxd7 37. Qxd7 Qb4 38. Bf2 b5 39. Bxe6 fxe6 40. Qxe6+ Kh7 41. Qd5 a5 42. Kf1 Qf8 43. Kg2 Qb4 44. Bc5 Qe1 45. Qf7 Qe2+ 46. Kh3 Qf1+ 47. Kh4 Qh1 48. h3 g5+ 1/2-1/2