[Event "IBM"]
[Site "Amsterdam"]
[Date "1961.??.??"]
[Round "9"]
[White "Tan, Hiong Liong"]
[Black "Langeweg, Kick"]
[Result "1-0"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4 4. Qb3 Nc6 5. a3 Bxc3 6. Qxc3 a5 7. b3 d6 8. d4 Qe7 9. Bb2 O-O 10. e3 Re8 11. Be2 e5 12. O-O Bg4 13. d5 Nb8 14. b4 Nbd7 15. Qc2 Bh5 16. e4 Nf8 17. h3 Bg6 18. Bd3 Nh5 19. g3 h6 20. Rfe1 Bh7 21. c5 g5 22. Nh2 Ng6 23. Ng4 Kg7 24. Bc3 Nhf4 25. gxf4 gxf4 26. Kh1 Rg8 27. Rg1 Qh4 28. Bf1 Kh8 29. bxa5 Rg7 30. f3 h5 31. Rb1 Ne7 32. Qf2 Qxf2 33. Nxf2 Rxg1+ 34. Kxg1 Nxd5 35. Bd2 Ne3 36. Nd1 f5 37. Bxe3 fxe3 38. exf5 Bxf5 39. Rxb7 Rg8+ 40. Kh2 1-0