[Event "Chigorin Memorial-05"]
[Site "Sochi"]
[Date "1965.??.??"]
[Round "11"]
[White "Lein, Anatoly"]
[Black "Kotkov, Yuri M"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 b5 7. O-O Bb7 8. Qe2 d6 9. a4 b4 10. Na2 Nf6 11. Bd2 d5 12. exd5 Nxd5 13. Qh5 g6 14. Qg4 Nc6 15. Rfe1 O-O-O 16. Nxc6 Qxc6 17. Bf1 Bc5 18. Qe2 Qc7 19. c3 Nf4 20. Bxf4 Qxf4 21. Rad1 bxc3 22. Nxc3 Rxd1 23. Rxd1 Rd8 24. Rxd8+ Kxd8 25. g3 Qd4 26. Bg2 Bxg2 27. Kxg2 a5 28. Qf3 f5 29. h4 Ke7 30. b3 Kf6 31. Ne2 Qe4 32. Qxe4 fxe4 33. Kf1 Ke5 34. Nf4 Be7 35. Ke1 g5 36. hxg5 Bxg5 37. Ne2 Kd5 38. Kd1 e3 39. f3 h5 40. Kc2 h4 41. gxh4 Bxh4 42. Kd3 Kc5 43. Kxe3 Kb4 44. Nd4 Bf6 45. Nc6+ Kxb3 46. Nxa5+ Kxa4 47. Nc4 Kb5 48. Na3+ Kb4 49. Nc2+ Kc5 50. Ke4 Kd6 1/2-1/2