[Event "IBM"]
[Site "Amsterdam"]
[Date "1962.08.17"]
[Round "4"]
[White "Van den Berg, Carel"]
[Black "Kieninger, Georg"]
[Result "1/2-1/2"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 b6 6. Ne2 Ba6 7. Bxa6 Nxa6 8. O-O c5 9. c3 g6 10. f4 Qc7 11. g4 O-O-O 12. f5 gxf5 13. gxf5 Bh6 14. Nf3 Rdg8+ 15. Kh1 Bxc1 16. Rxc1 Qc6 17. Qd2 Nc7 18. f6 Nf8 19. Rg1 Rxg1+ 20. Rxg1 h6 21. h4 Na6 22. Rg7 Qe8 23. Kh2 c4 24. b3 b5 25. Qb2 cxb3 26. axb3 b4 27. cxb4 Nxb4 28. Qc3+ Nc6 29. b4 Kb8 30. Nf4 Nd8 31. Nd3 Qb5 32. Nfe1 Nd7 33. Nc2 Qa4 34. Rg1 Nb6 35. Na3 Qc6 36. Nc5 Ka8 37. b5 Qc8 38. Nc2 Nb7 39. Nb4 Nxc5 40. dxc5 Na4 1/2-1/2