[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.07.18"]
[Round "5"]
[White "Geller, Efim P"]
[Black "Jongsma, Alexander"]
[Result "1-0"]
1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. d5 d6 5. c4 e5 6. Be2 Ne7 7. Nc3 Nd7 8. O-O O-O 9. Rb1 h6
10. Nb5 Nf6 11. Nd2 a6 12. Nc3 Bd7 13. b4 b6 14. a4 Qc7 15. Ba3 Rfb8 16. a5 cxb4 17. axb6
Rxb6 18. Bxb4 a5 19. Ba3 Rxb1 20. Qxb1 Nc8 21. Nb5 Bxb5 22. cxb5 Nd7 23. Rc1 Nc5 24. Nc4
Bf8 25. b6 Qb7 26. Bg4 f6 27. Bxc5 dxc5 28. Bxc8 Rxc8 29. Nxa5 Qa6 30. Nc6 Qb7 31. Qb5 Ra8
32. Na5 1-0