| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J M Boey vs H Duenhaupt |
| 1-0 | 41 | 1975 | 8th Correspondence World Championship | B82 Sicilian, Scheveningen |
| 27. H Duenhaupt vs J Sloth |
 | 0-1 | 55 | 1975 | 8th Correspondence World Championship | A04 Reti Opening |
| 28. V Zagorovsky vs H Duenhaupt |
| 1-0 | 49 | 1975 | 8th Correspondence World Championship | C95 Ruy Lopez, Closed, Breyer |
| 29. A Sandor Siklos vs H Duenhaupt |
| ½-½ | 55 | 1975 | 8th Correspondence World Championship | B40 Sicilian |
| 30. H Duenhaupt vs V Kosenkov |
| ½-½ | 29 | 1975 | 8th Correspondence World Championship | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 31. H Duenhaupt vs A Khasin |
| 1-0 | 35 | 1975 | 8th Correspondence World Championship | C02 French, Advance |
| 32. M Kletsel vs H Duenhaupt |
| ½-½ | 35 | 1975 | 8th Correspondence World Championship | E75 King's Indian, Averbakh, Main line |
| 33. L Abramov vs H Duenhaupt |
| 0-1 | 47 | 1975 | 8th Correspondence World Championship | D45 Queen's Gambit Declined Semi-Slav |
| 34. H Duenhaupt vs H de Carbonnel |
| ½-½ | 37 | 1975 | 8th Correspondence World Championship | A06 Reti Opening |
| 35. E Arnlind vs H Duenhaupt |
| ½-½ | 36 | 1975 | 8th Correspondence World Championship | B83 Sicilian |
| 36. H Duenhaupt vs Y Estrin |
| ½-½ | 16 | 1975 | 8th Correspondence World Championship | A07 King's Indian Attack |
| 37. H Duenhaupt vs J Maedler |
| 0-1 | 66 | 1975 | 8th Correspondence World Championship | B83 Sicilian |
| 38. H Duenhaupt vs E Walther |
| 1-0 | 28 | 1975 | 8th Correspondence World Championship | B83 Sicilian |
| 39. H Duenhaupt vs H Rittner |
| ½-½ | 32 | 1977 | corr | C02 French, Advance |
| 40. J Kostro vs H Duenhaupt |
| 0-1 | 40 | 1978 | corr 1.EU tt | B15 Caro-Kann |
| 41. G van Manen vs H Duenhaupt |
| 0-1 | 61 | 1978 | corr 1.EU tt | A29 English, Four Knights, Kingside Fianchetto |
| 42. L Endzelins vs H Duenhaupt |
| 0-1 | 36 | 1981 | EU Echecs jub20 corr8187 | B18 Caro-Kann, Classical |
| 43. H Duenhaupt vs H Bouwmeester |
| 0-1 | 32 | 1981 | corr | E59 Nimzo-Indian, 4.e3, Main line |
| 44. H Duenhaupt vs Forintos |
| 1-0 | 50 | 1981 | Heilimo memorial corr tournament | A07 King's Indian Attack |
| 45. L Omelchenko vs H Duenhaupt |
| ½-½ | 49 | 1982 | Kurt Klar mem corr8287 | B12 Caro-Kann Defense |
| 46. A A Idema vs H Duenhaupt |
| ½-½ | 43 | 1983 | NOR jub40 corr | E20 Nimzo-Indian |
| 47. G Timmerman vs H Duenhaupt |
| 1-0 | 56 | 1986 | FRG jub40 corr8692 | B18 Caro-Kann, Classical |
| 48. H Duenhaupt vs K Sorri |
| ½-½ | 35 | 1989 | Bergraser Memorial | A07 King's Indian Attack |
| 49. H Duenhaupt vs J van der Veen |
| 1-0 | 26 | 1989 | Bergraser Memorial | C84 Ruy Lopez, Closed |
| 50. A Viaud vs H Duenhaupt |
| ½-½ | 24 | 1989 | Bergraser Memorial | E19 Queen's Indian, Old Main line, 9.Qxc3 |
Kibitzing
