| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. R Lau vs R Mainka |
| 0-1 | 38 | 1989 | West German Championship | B82 Sicilian, Scheveningen |
| 52. D Komljenovic vs R Mainka |
| 1-0 | 30 | 1989 | Bad Mergentheim op | A57 Benko Gambit |
| 53. J Blauert vs R Mainka |
| ½-½ | 24 | 1989 | West German Championship | B22 Sicilian, Alapin |
| 54. H Wegner vs R Mainka |
| 1-0 | 40 | 1989 | West German Championship | D27 Queen's Gambit Accepted, Classical |
| 55. Jansa vs R Mainka |
| 1-0 | 46 | 1989 | Bad Mergentheim Open | B84 Sicilian, Scheveningen |
| 56. K Pytel vs R Mainka |
| 0-1 | 32 | 1989 | Liechtenstein Open | A06 Reti Opening |
| 57. R Mainka vs P Backwinkel |
| ½-½ | 49 | 1989 | West German Championship | B06 Robatsch |
| 58. R Mainka vs J Hickl |
| 0-1 | 26 | 1989 | West German Championship | B06 Robatsch |
| 59. R Mainka vs Miles |
| ½-½ | 43 | 1989 | BL2-W 8889 ;BL2 | B13 Caro-Kann, Exchange |
| 60. R Mainka vs Miles |
| 0-1 | 28 | 1989 | Bad Woerishofen op 5th | B13 Caro-Kann, Exchange |
| 61. M Klebel vs R Mainka |
| 0-1 | 44 | 1989 | West German Championship | A57 Benko Gambit |
| 62. M Ruf vs R Mainka |
| 0-1 | 28 | 1989 | West German Championship | D39 Queen's Gambit Declined, Ragozin, Vienna Variation |
| 63. R Mainka vs S Buecker |
| 1-0 | 30 | 1989 | Dortmund-B | B00 Uncommon King's Pawn Opening |
| 64. Ivkov vs R Mainka |
| ½-½ | 42 | 1989 | Dortmund-B | A41 Queen's Pawn Game (with ...d6) |
| 65. G Flear vs R Mainka |
| 0-1 | 41 | 1989 | Dortmund-B | A57 Benko Gambit |
| 66. R Mainka vs Lautier |
| 0-1 | 32 | 1989 | Dortmund-B | C11 French |
| 67. J Nun vs R Mainka |
| ½-½ | 11 | 1989 | Dortmund-B | C53 Giuoco Piano |
| 68. J Klinger vs R Mainka |
| ½-½ | 65 | 1989 | Dortmund-B | C78 Ruy Lopez |
| 69. R Mainka vs J Koch |
| 1-0 | 64 | 1989 | Dortmund-B | B77 Sicilian, Dragon, Yugoslav Attack |
| 70. A Sznapik vs R Mainka |
| ½-½ | 81 | 1989 | Dortmund-B | C78 Ruy Lopez |
| 71. M Wahls vs R Mainka |
| 1-0 | 32 | 1989 | Dortmund-B | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 72. R Mainka vs N Ristic |
| ½-½ | 65 | 1989 | Dortmund-B | B72 Sicilian, Dragon |
| 73. R Mainka vs J Klinger |
| 1-0 | 36 | 1989 | Liechtenstein Open | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 74. R Mainka vs W Haist |
| 1-0 | 45 | 1989 | Liechtenstein Open | B90 Sicilian, Najdorf |
| 75. R Mainka vs H Bastian |
| ½-½ | 42 | 1990 | Bundesliga 1989/90 | C67 Ruy Lopez |
Kibitzing
