[Event "Interzonal-04"]
[Site "Portoroz"]
[Date "1958.08.20"]
[Round "10"]
[White "Benko, Pal C"]
[Black "Olafsson, Fridrik"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Ne4 Nxe4 10. Bxe4 Bb7 11. Qa4 Qb6 12. O-O Be7 13. Nd2 Rc8 14. a3 Ba6 15. Rd1 Be2 16. Re1 Bb5 17. Qc2 Nf6 18. Bd3 O-O 19. Nc4 Bxc4 20. Qxc4 bxa3 21. bxa3 c5 22. dxc5 Rxc5 23. Qa6 Rd8 24. Qxb6 axb6 25. Be2 Ne4 26. Bf3 f5 27. Rb1 Rdc8 28. Bxe4 fxe4 29. Bd2 Rc2 30. Bb4 Bf6 31. Kf1 Be5 32. Re2 Kf7 33. Rxc2 Rxc2 34. Be1 Bb2 35. a4 Ke7 36. a5 bxa5 37. Bxa5 Kd6 38. Rd1+ Kc5 39. Bc7 Kc4 40. Bb6 g6 41. Bd4 1/2-1/2