[Event "Wageningen Zonal"]
[Site "Wageningen"]
[Date "1957.11.02"]
[Round "4"]
[White "Olafsson, Fridrik"]
[Black "Ivkov, Borislav"]
[Result "1-0"]

1. c4 Nf6 2. Nc3 e5 3. g3 c6 4. Nf3 e4 5. Nd4 d5 6. cxd5 cxd5 7. d3 Bc5 8. Nb3 Bb4 9. dxe4 Nxe4 10. Bd2 Qb6 11. Nxe4 dxe4 12. Bxb4 Qxb4+ 13. Qd2 Nc6 14. Bg2 Qxd2+ 15. Kxd2 Bf5 16. Rac1 Nb4 17. Rc4 Rd8+ 18. Kc1 Na6 19. Bxe4 Be6 20. Rc3 Nb4 21. Kb1 O-O 22. Bxb7 Rb8 23. Bf3 Rfe8 24. e4 a5 25. Nc1 f5 26. a3 fxe4 27. Bxe4 Nd5 28. Rc5 Nf6 29. Bc2 Ra8 30. f3 Bd5 31. Rxd5 Nxd5 32. Bb3 Rad8 33. Rd1 Re5 34. f4 Rf5 35. Ne2 a4 36. Bc4 Kf8 37. g4 Nc3+ 38. Nxc3 Rxd1+ 39. Nxd1 Rxf4 40. Be2 Re4 41. Nc3 Rf4 42. h4 1-0