[Event "IBM"]
[Site "Amsterdam"]
[Date "1968.??.??"]
[Round "1"]
[White "Jongsma, Alexander"]
[Black "Bronstein, David Ionovich"]
[Result "1/2-1/2"]

1. e4 c6 2. d3 e5 3. f4 exf4 4. Bxf4 d5 5. Nd2 Qf6 6. Bg3 Qxb2 7. Ngf3 Nf6 8. Be5 Qa3 9. Bxf6 gxf6 10. Be2 dxe4 11. Nxe4 Bg7 12. O-O f5 13. Ng3 f4 14. Ne4 O-O 15. d4 Bf5 16. Nf2 c5 17. Rb1 Nc6 18. Rb3 Qxa2 19. Rxb7 Rad8 20. Bd3 Bg6 21. dxc5 a5 22. Qb1 Qxb1 23. Rfxb1 a4 24. R1b6 a3 25. Rxc6 a2 26. Ra6 Ra8 27. Rba7 a1=Q+ 28. Rxa1 Bxa1 29. Rxa8 Rxa8 30. Nh3 Rc8 31. Nxf4 Rxc5 32. Nxg6 hxg6 33. Kf2 f5 34. Ke3 Kg7 35. h3 Kf6 36. g4 Bc3 37. gxf5 gxf5 38. Nh4 Re5+ 39. Kf3 Kg5 40. Nxf5 Rxf5+ 41. Bxf5 Kxf5 1/2-1/2