[Event "Match/Nation URS-YUG 38,5-21,5"]
[Site "Leningrad"]
[Date "1964.07.14"]
[Round "4"]
[White "Ivkov, Borislav"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5 6. Nb3 Ba7 7. O-O Nc6 8. N1d2 Nge7 9. Nf3 Ng6 10. Qe2 O-O 11. Be3 d6 12. Bxa7 Rxa7 13. Qe3 Ra8 14. Rfd1 Qf6 15. c3 e5 16. g3 Bg4 17. Be2 Rad8 18. Rd3 Qe7 19. Nh4 Be6 20. Nf5 Qc7 21. Qf3 Nce7 22. Rad1 d5 23. Nxe7+ Nxe7 24. exd5 e4 25. Qxe4 Bf5 26. Qh4 Bxd3 27. Bxd3 g6 28. c4 b5 29. Qd4 bxc4 30. Bxc4 Nf5 31. Qc5 Qe5 32. Bxa6 Qxb2 33. Bd3 Qxa2 34. Bxf5 Qxb3 35. Bc2 Qb2 36. Ba4 Ra8 37. Bc6 Ra1 38. Rxa1 Qxa1+ 39. Kg2 Qe5 40. Qa3 Rd8 41. Qd3 Kg7 42. h4 f5 43. Qd2 Rd6 44. h5 Qe4+ 45. f3 Qe5 46. h6+ Kf7 47. f4 Qf6 48. Qe3 Rd8 49. Qa7+ Qe7 50. Qa1 Qf6 51. Qa7+ 1/2-1/2