| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J Pinter vs R Mainka |
| 1-0 | 41 | 1988 | Dortmund-A | A57 Benko Gambit |
| 27. P Spacek vs R Mainka |
| 0-1 | 43 | 1988 | Luxembourg Open | A58 Benko Gambit |
| 28. K Schulz vs R Mainka |
| 0-1 | 29 | 1988 | Luxembourg Open | A21 English |
| 29. R Mainka vs D Werner |
| 1-0 | 23 | 1988 | Luxembourg Open | C18 French, Winawer |
| 30. R Mainka vs M Jadoul |
| 0-1 | 47 | 1988 | Luxembourg Open | B14 Caro-Kann, Panov-Botvinnik Attack |
| 31. R Mainka vs K Mokry |
| 0-1 | 34 | 1988 | Peer Gynt | C60 Ruy Lopez |
| 32. R Mainka vs J Ambroz |
| 1-0 | 57 | 1988 | Bad Mergentheim Open | C18 French, Winawer |
| 33. D Rajkovic vs R Mainka |
| 0-1 | 37 | 1988 | Bad Mergentheim Open | A46 Queen's Pawn Game |
| 34. R Mainka vs R Kleinschroth |
| 1-0 | 30 | 1988 | Bad Mergentheim Open | C65 Ruy Lopez, Berlin Defense |
| 35. R Mainka vs B Lalic |
| 0-1 | 40 | 1988 | Bad Mergentheim Open | C11 French |
| 36. R Mainka vs D Komljenovic |
 | ½-½ | 60 | 1988 | Bad Mergentheim Open | B77 Sicilian, Dragon, Yugoslav Attack |
| 37. R Mainka vs S Neurohr |
| 1-0 | 36 | 1988 | Bad Mergentheim Open | B90 Sicilian, Najdorf |
| 38. G Gallus vs R Mainka |
| 0-1 | 28 | 1988 | Bad Mergentheim Open | A00 Uncommon Opening |
| 39. R Lau vs R Mainka |
| 0-1 | 38 | 1989 | West German Championship | B82 Sicilian, Scheveningen |
| 40. M Klebel vs R Mainka |
| 0-1 | 44 | 1989 | West German Championship | A57 Benko Gambit |
| 41. R Mainka vs Smejkal |
| 1-0 | 46 | 1989 | Bad Mergentheim op | C96 Ruy Lopez, Closed |
| 42. R Mainka vs C Maier |
| ½-½ | 41 | 1989 | West German Championship | C16 French, Winawer |
| 43. R Mainka vs P Schlosser |
| 1-0 | 48 | 1989 | West German Championship | B80 Sicilian, Scheveningen |
| 44. L Keitlinghaus vs R Mainka |
| 0-1 | 45 | 1989 | West German Championship | A09 Reti Opening |
| 45. R Mainka vs J Hickl |
| 0-1 | 26 | 1989 | West German Championship | B06 Robatsch |
| 46. R Mainka vs Miles |
| ½-½ | 43 | 1989 | BL2-W 8889 ;BL2 | B13 Caro-Kann, Exchange |
| 47. R Mainka vs N Michaelsen |
| 1-0 | 58 | 1989 | West German Championship | C42 Petrov Defense |
| 48. D Komljenovic vs R Mainka |
| 1-0 | 30 | 1989 | Bad Mergentheim op | A57 Benko Gambit |
| 49. R Mainka vs E Schmittdiel |
| ½-½ | 13 | 1989 | West German Championship | A15 English |
| 50. R Mainka vs Hort |
| 0-1 | 28 | 1989 | West German Championship | C67 Ruy Lopez |
Kibitzing
