| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. H Rittner vs H Liebert |
| ½-½ | 16 | 1956 | East German Championship | A04 Reti Opening |
| 27. H Rittner vs B Malich |
| ½-½ | 35 | 1956 | East German Championship | B56 Sicilian |
| 28. H Rittner vs J Jezek |
| 1-0 | 38 | 1960 | corr FS | C73 Ruy Lopez, Modern Steinitz Defense |
| 29. J Balogh vs H Rittner |
| 0-1 | 32 | 1960 | corr FS | C02 French, Advance |
| 30. H Rittner vs Z Nilsson |
| ½-½ | 42 | 1960 | corr FS | B16 Caro-Kann, Bronstein-Larsen Variation |
| 31. H Rittner vs P Dubinin |
| 0-1 | 43 | 1960 | corr USSR-BRD | E79 King's Indian, Four Pawns Attack, Main line |
| 32. M Albareda Creus vs H Rittner |
| ½-½ | 49 | 1964 | corr FS | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 33. J Balogh vs H Rittner |
| ½-½ | 55 | 1964 | corr FS | B25 Sicilian, Closed |
| 34. Y Estrin vs H Rittner |
| 0-1 | 59 | 1964 | corr Ragozin mem | C17 French, Winawer, Advance |
| 35. H Rittner vs J Kellner |
| 1-0 | 47 | 1965 | olm5 fin B1 corr6568 | C03 French, Tarrasch |
| 36. S Fazekas vs H Rittner |
 | 1-0 | 32 | 1965 | olm5 fin B1 corr6568 | A17 English |
| 37. E Arnlind vs H Rittner |
| ½-½ | 29 | 1965 | olm5 fin B1 corr6568 | C18 French, Winawer |
| 38. H Rittner vs S Bernstein |
| 1-0 | 54 | 1965 | olm5 fin B1 corr6568 | B35 Sicilian, Accelerated Fianchetto, Modern Variation with Bc4 |
| 39. H Rittner vs V Kornfilt |
| 1-0 | 41 | 1965 | olm5 fin B1 corr6568 | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 40. H Rittner vs H Duenhaupt |
| ½-½ | 66 | 1965 | olm5 fin B1 corr6568 | B25 Sicilian, Closed |
| 41. V Zagorovsky vs H Rittner |
| ½-½ | 19 | 1965 | olm5 fin B1 corr6568 | C09 French, Tarrasch, Open Variation, Main line |
| 42. J Snajdr vs H Rittner |
| 1-0 | 21 | 1965 | olm5 fin B1 corr6568 | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 43. H Rittner vs Simagin |
 | 1-0 | 45 | 1966 | corr-1 | B62 Sicilian, Richter-Rauzer |
| 44. H Rittner vs Simagin |
| 0-1 | 38 | 1968 | corr | B88 Sicilian, Fischer-Sozin Attack |
| 45. C Jansen vs H Rittner |
| 0-1 | 28 | 1968 | 6th Correspondence World Championship | E53 Nimzo-Indian, 4.e3 |
| 46. N Karker vs H Rittner |
| 0-1 | 39 | 1968 | 6th Correspondence World Championship | B82 Sicilian, Scheveningen |
| 47. H Rittner vs D Stern |
| 1-0 | 37 | 1968 | 6th Correspondence World Championship | B64 Sicilian, Richter-Rauzer Attack |
| 48. H Rittner vs E Thiele |
| 1-0 | 55 | 1968 | 6th Correspondence World Championship | A13 English |
| 49. R Sevecek vs H Rittner |
| ½-½ | 42 | 1968 | 6th Correspondence World Championship | C18 French, Winawer |
| 50. V Zagorovsky vs H Rittner |
| ½-½ | 24 | 1968 | 6th Correspondence World Championship | C18 French, Winawer |
Kibitzing
