[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.07.22"]
[Round "8"]
[White "Jongsma, Alexander"]
[Black "Csom, Istvan"]
[Result "1/2-1/2"]

1. d4 Nf6 2. Nf3 b6 3. Bf4 Bb7 4. e3 c5 5. c3 d6 6. h3 Nbd7 7. Nbd2 g6 8. Be2 Bg7 9. O-O O-O 10. Bh2 Rc8 11. a4 a6 12. Qb1 cxd4 13. exd4 Nd5 14. Re1 N7f6 15. Bf1 a5 16. Qd1 Bh6 17. Bg3 Rc7 18. Bh4 Bg7 19. Qb3 Qa8 20. Rad1 Rfc8 21. Bg3 Bh6 22. Nc4 Bc6 23. Nh2 Bf8 24. Ng4 Nh5 25. Bh2 Rb8 26. Na3 Ndf4 27. Ne3 Nd5 28. Nb5 Rd7 29. c4 Nxe3 30. Qxe3 Rc8 31. Nc3 d5 32. b3 Nf6 33. Be5 Bg7 34. f4 e6 35. g4 Rcd8 36. Kh2 dxc4 37. bxc4 Ne8 38. Bxg7 Nxg7 39. d5 exd5 40. cxd5 Bxd5 41. Nxd5 Rxd5 42. Bg2 Rxd1 43. Bxa8 Rxe1 44. Qxe1 Rxa8 45. f5 gxf5 46. gxf5 f6 47. Qe7 Re8 48. Qxf6 Rf8 49. Qxb6 Rxf5 50. Kg3 h5 1/2-1/2