| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. H Rittner vs J Ljungdahl |
 | 1-0 | 28 | 1968 | 6th Correspondence World Championship | B48 Sicilian, Taimanov Variation |
| 52. H Rittner vs J Kellner |
 | 1-0 | 50 | 1968 | 6th Correspondence World Championship | C03 French, Tarrasch |
| 53. H Rittner vs Y Estrin |
| 1-0 | 27 | 1968 | 6th Correspondence World Championship | D92 Grunfeld, 5.Bf4 |
| 54. H Rittner vs H de Carbonnel |
| 1-0 | 39 | 1968 | 6th Correspondence World Championship | C82 Ruy Lopez, Open |
| 55. S Nyman vs H Rittner |
| 0-1 | 53 | 1968 | 6th Correspondence World Championship | C18 French, Winawer |
| 56. S Aarseth vs H Rittner |
| 0-1 | 14 | 1968 | 6th Correspondence World Championship | C17 French, Winawer, Advance |
| 57. N Karker vs H Rittner |
| 0-1 | 39 | 1968 | 6th Correspondence World Championship | B82 Sicilian, Scheveningen |
| 58. C Jansen vs H Rittner |
| 0-1 | 28 | 1968 | 6th Correspondence World Championship | E53 Nimzo-Indian, 4.e3 |
| 59. J Hybl vs H Rittner |
| ½-½ | 15 | 1968 | 6th Correspondence World Championship | E53 Nimzo-Indian, 4.e3 |
| 60. H Rittner vs Griso |
| 1-0 | 21 | 1969 | corr DDR-USSR | B46 Sicilian, Taimanov Variation |
| 61. P Dubinin vs H Rittner |
| 1-0 | 37 | 1969 | corr | B32 Sicilian |
| 62. H Rittner vs M Napolitano |
| 1-0 | 64 | 1970 | corr FRG jub | B32 Sicilian |
| 63. P G Heilemann vs H Rittner |
| ½-½ | 50 | 1970 | corr FRG jub | E16 Queen's Indian |
| 64. H Rittner vs E Arnlind |
| ½-½ | 66 | 1970 | FRG jub-A corr7074 | B32 Sicilian |
| 65. M Yudovich Sr vs H Rittner |
| ½-½ | 10 | 1970 | corr FRG jub | C09 French, Tarrasch, Open Variation, Main line |
| 66. Shamkovich vs H Rittner |
| 0-1 | 15 | 1970 | corr FRG jub | C07 French, Tarrasch |
| 67. H Rittner vs J Balogh |
| ½-½ | 49 | 1970 | corr FRG jub | A34 English, Symmetrical |
| 68. H Rittner vs R Sevecek |
| ½-½ | 20 | 1970 | corr FRG jub | C93 Ruy Lopez, Closed, Smyslov Defense |
| 69. H Rittner vs C Hunter |
| 1-0 | 41 | 1970 | corr FRG jub | C63 Ruy Lopez, Schliemann Defense |
| 70. F Brglez vs H Rittner |
| ½-½ | 27 | 1970 | corr FRG jub | A23 English, Bremen System, Keres Variation |
| 71. H Heemsoth vs H Rittner |
| 0-1 | 25 | 1970 | corr FRG jub | B45 Sicilian, Taimanov |
| 72. Sevecek vs H Rittner |
| ½-½ | 42 | 1971 | corr | C18 French, Winawer |
| 73. V Zagorovsky vs H Rittner |
| ½-½ | 24 | 1971 | corr WER/K | C18 French, Winawer |
| 74. G A Popov vs H Rittner |
| 1-0 | 33 | 1973 | corr ol7 | C07 French, Tarrasch |
| 75. Nyman vs H Rittner |
| 0-1 | 53 | 1974 | corr | C18 French, Winawer |
Kibitzing
