[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.07.29"]
[Round "13"]
[White "Jongsma, Alexander"]
[Black "Ciric, Dragoljub M"]
[Result "0-1"]

1. c4 Nf6 2. Nf3 e6 3. d4 c5 4. e3 d5 5. Nc3 Nc6 6. Bd3 cxd4 7. exd4 Be7 8. O-O O-O 9. Bg5 b6 10. a3 Bb7 11. Re1 Rc8 12. cxd5 Nxd5 13. Bxe7 Ncxe7 14. Ne4 Nf5 15. Ng3 Nh4 16. Nxh4 Qxh4 17. Be4 Ba8 18. Qd2 Nf6 19. Bxa8 Rxa8 20. Ne2 Rfd8 21. Qe3 Rd7 22. Rac1 Rad8 23. h3 h6 24. Red1 Ne8 25. a4 Nd6 26. g4 Qf6 27. Kg2 Nc8 28. Rc4 Ne7 29. Rdc1 g5 30. Qe4 Ng6 31. Rc8 Kg7 32. R1c7 Qe7 33. Rxd7 Qxd7 34. Rxd8 Qxd8 35. Nc3 Qd6 36. Qe3 Qb4 37. Qd2 Nf4+ 38. Kh2 Qd6 39. Ne4 Qc6 40. f3 Qxa4 41. h4 Qb5 42. hxg5 hxg5 43. d5 Qxd5 44. Qc3+ e5 45. Nxg5 Qd4 46. Qxd4 exd4 47. Kg3 Nd3 48. b3 0-1