[Event "Chigorin Memorial-09"]
[Site "Sochi"]
[Date "1973.??.??"]
[Round "2"]
[White "Spiridonov, Nikola"]
[Black "Krogius, Nikolai V"]
[Result "0-1"]

1. Nf3 Nf6 2. c4 g6 3. b4 Bg7 4. Bb2 O-O 5. e3 c6 6. Be2 d5 7. O-O Bg4 8. a4 Nbd7 9. d4 dxc4 10. Bxc4 Nd5 11. Qb3 Bxf3 12. gxf3 e5 13. Bxd5 cxd5 14. Qxd5 Qg5+ 15. Kh1 Nb6 16. Qxb7 exd4 17. Bxd4 Bxd4 18. exd4 Nd5 19. b5 Rae8 20. Nd2 Re2 21. Ne4 Qf5 22. Ra3 Nf4 23. Qc7 Rxe4 24. fxe4 Qxe4+ 25. f3 Qe2 26. Rg1 Nd3 27. Rxd3 Qxd3 28. Qf4 Rd8 29. Re1 Rxd4 30. Qf6 Rd8 31. Kg1 Rc8 32. Qe5 Qxf3 33. Qe4 Qc3 34. Re3 Qd2 35. Re2 Qg5+ 36. Kf2 Rc5 37. Re3 Rf5+ 38. Rf3 Qd2+ 39. Kf1 Qd1+ 40. Kf2 Rxf3+ 41. Qxf3 Qxa4 42. Qc6 Qd4+ 43. Ke2 Kg7 44. Qb7 Qb6 45. Qc6 Kf8 46. Qa8+ 0-1