| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. R Mainka vs Christiansen |
| 0-1 | 39 |
1990 |
BL 8990 ;BL | B30 Sicilian |
| 2. R Mainka vs I Rogers |
| 0-1 | 43 |
1990 |
It \\ | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 3. R Mainka vs Judit Polgar |
 | 1-0 | 34 |
1990 |
Dortmund-B | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 4. R Mainka vs Jansa |
| 0-1 | 62 |
1990 |
Luxembourg | B46 Sicilian, Taimanov Variation |
| 5. R Mainka vs Khalifman |
| 0-1 | 32 |
1991 |
Triberg (Germany) | B50 Sicilian |
| 6. R Mainka vs G Timoshchenko |
| 0-1 | 38 |
1991 |
Ostende op | B85 Sicilian, Scheveningen, Classical |
| 7. R Mainka vs Zsuzsa Polgar |
| ½-½ | 13 |
1991 |
Polanica Zdroj | B27 Sicilian |
| 8. R Mainka vs G Timoshchenko |
| 1-0 | 36 |
1991 |
Oberwart op | B90 Sicilian, Najdorf |
| 9. R Mainka vs Lautier |
| ½-½ | 26 |
1991 |
cat.11 | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 10. R Mainka vs Dorfman |
| 0-1 | 48 |
1992 |
Polanica Zdroj | B90 Sicilian, Najdorf |
| 11. R Mainka vs Adorjan |
| 0-1 | 38 |
1992 |
Memorial A.Rubinshtein | B83 Sicilian |
| 12. R Mainka vs I Stohl |
| ½-½ | 36 |
1992 |
Prague Chip | B90 Sicilian, Najdorf |
| 13. R Mainka vs Vyzmanavin |
| 0-1 | 58 |
1994 |
Intel Chess Grand Prix (active), IX | B40 Sicilian |
| 14. R Mainka vs A Petrosian |
| 1-0 | 39 |
1998 |
26. IDS IM | B50 Sicilian |
| 15. R Mainka vs Naiditsch |
| ½-½ | 20 |
1999 |
Sportland-NRW-Cup | B92 Sicilian, Najdorf, Opocensky Variation |
| 16. R Mainka vs A Dranov |
| 0-1 | 41 |
2000 |
Bundesliga 2007-8 | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 17. R Mainka vs V Milov |
| ½-½ | 32 |
2000 |
Frankfurt Ordix op | B43 Sicilian, Kan, 5.Nc3 |
| 18. R Mainka vs C Lutz |
| 1-0 | 72 |
2001 |
Julian Borowski Rapid | B48 Sicilian, Taimanov Variation |
| 19. R Mainka vs R Kistella |
| 1-0 | 54 |
2001 |
open | B23 Sicilian, Closed |
| 20. R Mainka vs Le Andrade |
| 1-0 | 37 |
2001 |
43rd Tch-POR | B58 Sicilian |
| 21. R Mainka vs R Jaenig |
| 1-0 | 42 |
2001 |
open | B40 Sicilian |
| 22. R Mainka vs V Morais |
| 1-0 | 23 |
2001 |
43rd Tch-POR | B30 Sicilian |
| 23. R Mainka vs A Hoffmann |
 | 1-0 | 27 |
2001 |
Nord-West Cup | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 24. R Mainka vs K Lerner |
| 0-1 | 38 |
2001 |
5th OIBM | B63 Sicilian, Richter-Rauzer Attack |
| 25. R Mainka vs Andreas Schneider |
 | 1-0 | 33 |
2001 |
Nord-West Cup | B40 Sicilian |