| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. S Ingenerf vs G Mainka |
| ½-½ | 33 | 1986 | Germany | A10 English |
| 2. C Goldschmidt vs G Mainka |
 | 0-1 | 22 | 1986 | Dortmund Open | B01 Scandinavian |
| 3. H Schulz vs G Mainka |
| ½-½ | 36 | 1986 | Dortmund Open | D02 Queen's Pawn Game |
| 4. M Feist vs G Mainka |
| 0-1 | 69 | 1986 | Dortmund Open | B01 Scandinavian |
| 5. G Mainka vs B Kohlweyer |
| ½-½ | 32 | 1987 | Dortmund-B | B18 Caro-Kann, Classical |
| 6. V Bukal Sr vs G Mainka |
| 1-0 | 35 | 1988 | Dortmund-B | A21 English |
| 7. C Kamp vs G Mainka |
| ½-½ | 36 | 1988 | BL2-W 8788 | A21 English |
| 8. E Schmittdiel vs G Mainka |
| 0-1 | 21 | 1988 | Dortmund-B | D01 Richter-Veresov Attack |
| 9. G Makropoulos vs G Mainka |
| ½-½ | 50 | 1988 | Dortmund-B | C02 French, Advance |
| 10. T Tolnai vs G Mainka |
| 1-0 | 34 | 1988 | Dortmund-B | C78 Ruy Lopez |
| 11. G Mainka vs W Schmidt |
| 0-1 | 43 | 1988 | Dortmund-B | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 12. G Mainka vs I Farago |
| 1-0 | 33 | 1988 | Dortmund-B | C16 French, Winawer |
| 13. B Kohlweyer vs G Mainka |
| 1-0 | 61 | 1988 | Dortmund-B | D21 Queen's Gambit Accepted |
| 14. L Keitlinghaus vs G Mainka |
| 1-0 | 35 | 1988 | Dortmund-B | A21 English |
| 15. G Mainka vs A Davidovic |
| 0-1 | 72 | 1988 | Dortmund-B | C42 Petrov Defense |
| 16. G Mainka vs J Konikowski |
| ½-½ | 33 | 1988 | Dortmund-B | B42 Sicilian, Kan |
| 17. G Mainka vs S Martinovic |
| 1-0 | 30 | 1988 | Dortmund-B | B32 Sicilian |
| 18. Jansa vs G Mainka |
| 1-0 | 35 | 1988 | Peer Gynt | C78 Ruy Lopez |
| 19. M A Simic vs G Mainka |
| 1-0 | 41 | 1988 | Bad Mergentheim Open | A49 King's Indian, Fianchetto without c4 |
| 20. G Gaertner vs G Mainka |
| 1-0 | 12 | 1989 | Nova-Park/SW,2,19 | D20 Queen's Gambit Accepted |
| 21. G Mainka vs Miles |
| 0-1 | 26 | 1989 | Bad Woerishofen op 5th | B13 Caro-Kann, Exchange |
| 22. G Dermann vs G Mainka |
| ½-½ | 31 | 1989 | Dortmund-C | C07 French, Tarrasch |
| 23. S Tatai vs G Mainka |
| ½-½ | 22 | 1989 | Dortmund-C | D22 Queen's Gambit Accepted |
| 24. F Schuh vs G Mainka |
| 0-1 | 30 | 1989 | Dortmund-C | D22 Queen's Gambit Accepted |
| 25. C Bernard vs G Mainka |
| 1-0 | 33 | 1989 | Dortmund-C | A41 Queen's Pawn Game (with ...d6) |
Kibitzing
