[Event "IBM"]
[Site "Amsterdam"]
[Date "1961.??.??"]
[Round "2"]
[White "Tan, Hiong Liong"]
[Black "De Rooi, Paul"]
[Result "1-0"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Qf6 8. Qc7 Nge7 9. Nc3 O-O 10. Be3 d6 11. O-O-O Rd8 12. Bc4 Bg4 13. f3 Rd7 14. Qb6 Nc8 15. Nd5 Nxb6 16. Nxf6+ gxf6 17. Bxb6 Be6 18. Bxe6 fxe6 19. Rd2 d5 20. Rhd1 d4 21. c3 Rc8 22. Rc2 Kf7 23. cxd4 exd4 24. Rxd4 Nxd4 25. Rxc8 Ne2+ 26. Kc2 Nf4 27. g3 Nd3 28. Rc3 Nb4+ 29. Kb3 Nc6 30. Be3 Rd1 31. a3 Rh1 32. Rc2 Rf1 33. Rf2 Re1 34. Bd2 Rd1 35. Kc2 Rh1 36. Bc3 f5 37. Kd3 b5 38. Rc2 Ke7 39. exf5 exf5 40. Ke3 Ke6 41. Kf4 Rf1 42. Re2+ Kf7 43. Rd2 Ke6 44. Bb4 Nxb4 45. axb4 Rc1 46. b3 Rc3 47. Re2+ Kd5 48. Re5+ Kd4 49. Rxf5 Rxb3 50. Rf6 Rxb4 51. Rxa6 Ra4 52. Rd6+ Kc3+ 53. Kg5 Ra7 54. Rc6+ Kb3 55. f4 b4 56. f5 Ka2 57. Rc2+ Ka1 58. Rc1+ Ka2 59. f6 b3 60. Rf1 Rf7 61. Kf5 b2 62. Ke6 Rb7 63. f7 Rb6+ 64. Ke7 Rb7+ 65. Kf6 1-0