| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. H J Giesbergen vs G Timmerman |
| 0-1 | 52 | 1980 | NED-ch10 corr | C26 Vienna |
| 27. G Timmerman vs R Hartog |
| 1-0 | 18 | 1980 | FRG corr | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 28. G Timmerman vs G Van Buuren |
| 1-0 | 42 | 1980 | NED-ch10 corr | C80 Ruy Lopez, Open |
| 29. M V Fiorito vs G Timmerman |
 | 0-1 | 43 | 1980 | NED-ch10 corr | C27 Vienna Game |
| 30. J Sinke vs G Timmerman |
| 0-1 | 41 | 1980 | NED-ch10 corr | C33 King's Gambit Accepted |
| 31. G Timmerman vs K Nienhuis |
| ½-½ | 40 | 1980 | NED-ch10 corr | C60 Ruy Lopez |
| 32. R E Booij vs G Timmerman |
| 0-1 | 20 | 1980 | NED-ch10 corr | C29 Vienna Gambit |
| 33. P Seewald vs G Timmerman |
| ½-½ | 41 | 1980 | NED-ch10 corr | E77 King's Indian |
| 34. G Timmerman vs H G J Holscher |
| 1-0 | 38 | 1980 | NED-ch10 corr | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 35. A Masselink vs G Timmerman |
| 0-1 | 25 | 1980 | FRG corr | E96 King's Indian, Orthodox, 7...Nbd7, Main line |
| 36. C Praagman vs G Timmerman |
| 0-1 | 40 | 1980 | NED-ch10 corr | E92 King's Indian |
| 37. M M Wind vs G Timmerman |
| 1-0 | 17 | 1981 | NED-ch11 corr8183 | B30 Sicilian |
| 38. F Vlugt vs G Timmerman |
| 1-0 | 21 | 1981 | NED-ch11 corr8183 | B63 Sicilian, Richter-Rauzer Attack |
| 39. G Timmerman vs R Weyerstrass |
| ½-½ | 44 | 1981 | NED-ch11 corr8183 | C16 French, Winawer |
| 40. M Etmans vs G Timmerman |
| ½-½ | 30 | 1981 | NED-ch11 corr8183 | C77 Ruy Lopez |
| 41. G Timmerman vs A den Hamer |
| 0-1 | 42 | 1981 | NED-ch11 corr8183 | C81 Ruy Lopez, Open, Howell Attack |
| 42. G Timmerman vs H de Jong |
| ½-½ | 41 | 1981 | NED-ch11 corr8183 | C81 Ruy Lopez, Open, Howell Attack |
| 43. G Timmerman vs D Langerak |
| 1-0 | 19 | 1981 | NED corr | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 44. H J Giesbergen vs G Timmerman |
| 0-1 | 52 | 1982 | cr 10th NED-ch | C26 Vienna |
| 45. G Timmerman vs A de Klerk |
| 1-0 | 35 | 1982 | NED-ch12 corr8284 | B89 Sicilian |
| 46. J van Oosterom vs G Timmerman |
| 0-1 | 31 | 1982 | Volmac-A corr8286 | C47 Four Knights |
| 47. G Timmerman vs V Bergraser |
| 1-0 | 28 | 1982 | Volmac-A corr8286 | B01 Scandinavian |
| 48. J Helsloot vs G Timmerman |
| 1-0 | 32 | 1982 | NED-ch12 corr8284 | A56 Benoni Defense |
| 49. G Timmerman vs K B Richardson |
| 1-0 | 31 | 1982 | Volmac-A corr8286 | B09 Pirc, Austrian Attack |
| 50. F Vlugt vs G Timmerman |
| 0-1 | 34 | 1982 | NED-ch12 corr8284 | B68 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 9...Be7 |
Kibitzing
