[Event "IBM"]
[Site "Amsterdam"]
[Date "1967.??.??"]
[Round "5"]
[White "Ciric, Dragoljub M"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Re8 13. Nf1 Bf8 14. b3 g6 15. Bg5 Bg7 16. dxe5 dxe5 17. Qd2 Bd7 18. Rad1 Be6 19. Nxe5 Rad8 20. Nd3 c4 21. bxc4 bxc4 22. Qf4 Qxf4 23. Nxf4 Rxd1 24. Rxd1 h6 25. Bxf6 Bxf6 26. Ne2 Rb8 27. Rb1 Rxb1 28. Bxb1 g5 29. Ne3 h5 30. Nd4 Kf8 31. Kf1 Ke7 32. Ke2 Kd6 33. Kd2 Kc5 34. Nxe6+ fxe6 35. g3 Nc6 36. Ng2 h4 37. gxh4 gxh4 38. f4 e5 39. f5 Na7 40. a4 Nc8 41. Ke2 Bg5 42. Kf3 Nb6 43. Kg4 Bd2 44. Bc2 Nd7 1/2-1/2