[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.07.20"]
[Round "6"]
[White "Ree, Hans"]
[Black "Csom, Istvan"]
[Result "1-0"]

1. c4 e5 2. Nc3 d6 3. Nf3 f5 4. d4 e4 5. Nd2 Nf6 6. e3 g6 7. b4 Bg7 8. Bb2 c6 9. Qb3 Nbd7 10. Be2 Qe7 11. c5 d5 12. b5 O-O 13. g3 Qe6 14. a4 a6 15. bxa6 bxa6 16. a5 g5 17. Na4 f4 18. Nb6 Rb8 19. gxf4 gxf4 20. exf4 Ne8 21. Qg3 Qf6 22. Nb3 Qxf4 23. Qxf4 Rxf4 24. Bc1 Rf7 25. Rg1 Kf8 26. Bh5 Ndf6 27. Bxf7 Kxf7 28. Bf4 Rb7 29. Nxc8 Rxb3 30. Na7 Nh5 31. Be3 Nc7 32. Nxc6 Ne6 33. O-O-O Rc3+ 34. Kb2 Rc4 35. Rc1 Rxc1 36. Rxc1 Nhf4 37. Ka3 Ne2 38. Rb1 Bxd4 39. Rb7+ Kf6 40. Nxd4 N2xd4 41. Bxd4+ Nxd4 42. Rxh7 Nb5+ 43. Kb2 1-0