[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1968.01.13"]
[Round "4"]
[White "Ivkov, Borislav"]
[Black "Kortschnoj, Viktor Lvovich"]
[Result "0-1"]

1. d4 e6 2. c4 Nf6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2 Nxc3 9.
Qxc3 Qc8 10. Rd1 d5 11. cxd5 Bxd5 12. Ne5 Bxg2 13. Kxg2 Qb7+ 14. Qf3 Qxf3+ 15. Kxf3 f6 16.
Nd3 Nc6 17. Nf4 e5 18. Ne6 Nxd4+ 19. Nxd4 exd4 20. Rxd4 Rfd8 21. Rxd8+ Rxd8 22. Be3 Kf7
23. a4 Ke6 24. g4 Rd5 25. Rc1 c5 26. b3 Bd6 27. h3 g6 28. Ke4 Be5 29. Rc4 Rd1 30. Rc1 f5+
31. gxf5+ gxf5+ 32. Kf3 Rxc1 33. Bxc1 Kd5 34. Bg5 a6 35. Bd8 b5 36. axb5 axb5 37. Ba5 c4
38. bxc4+ Kxc4 39. e4 fxe4+ 40. Kxe4 Bc3 41. Bd8 b4 42. Be7 b3 43. Ba3 Bg7 44. f4 Kc3 45.
f5 Kc2 46. Kd5 Bf8 47. Bxf8 b2 48. Ke6 b1=Q 49. f6 Qb3+ 50. Ke7 Qxh3 51. f7 Qa3+ 52. Ke8
Qa4+ 53. Ke7 Qb4+ 54. Ke8 Qb8+ 55. Ke7 Qe5+ 56. Kd7 Qf6 57. Ke8 Qc6+ 58. Ke7 Qg6 59. Ke8
Kb3 60. Be7 Kc4 0-1