| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. J Koller vs F Schirm |
| 0-1 | 32 | 2001 | Bad Zwesten Open | B32 Sicilian |
| 2. O Hess vs J Koller |
| 1-0 | 61 | 2001 | Bad Zwesten Open | E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1 |
| 3. J Koller vs P Balcerak |
| 1-0 | 50 | 2001 | Bad Zwesten Open | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 4. J Koller vs J Dorst |
| 1-0 | 35 | 2001 | Bad Zwesten Open | B33 Sicilian |
| 5. A Knickel vs J Koller |
| 1-0 | 28 | 2002 | Bad Zwesten Open | B40 Sicilian |
| 6. J Koller vs U Pichl |
| 1-0 | 56 | 2002 | Bad Zwesten Open | C30 King's Gambit Declined |
| 7. T Heisterhagen vs J Koller |
| 0-1 | 42 | 2002 | Bad Zwesten Open | A07 King's Indian Attack |
| 8. O Heinzel vs J Koller |
| 1-0 | 46 | 2002 | Bad Zwesten Open | E81 King's Indian, Samisch |
| 9. J Koller vs W Weissbeck |
| 1-0 | 34 | 2002 | Bad Zwesten Open | B07 Pirc |
| 10. J Koller vs N Heck |
| 0-1 | 40 | 2002 | Bad Zwesten Open | B06 Robatsch |
| 11. M Drobinski vs J Koller |
| 0-1 | 43 | 2002 | Bad Zwesten Open | E81 King's Indian, Samisch |
| 12. J Koller vs J Mentel |
| ½-½ | 52 | 2002 | Bad Zwesten Open | B07 Pirc |
| 13. T Rohde vs J Koller |
| 0-1 | 31 | 2002 | Bad Zwesten Open | B44 Sicilian |
| 14. T Markowski vs J Koller |
| 1-0 | 33 | 2003 | Bad Zwesten op 7th | A00 Uncommon Opening |
| 15. S Galdunts vs J Koller |
| 1-0 | 35 | 2003 | Bad Zwesten op 7th | B40 Sicilian |
| 16. T Henrichs vs J Koller |
| 1-0 | 21 | 2003 | Dortmund op-A | B46 Sicilian, Taimanov Variation |
| 17. T Markowski vs J Koller |
| 1-0 | 22 | 2004 | Bad Zwesten op 8th | A00 Uncommon Opening |
| 18. J Koller vs F Zhang |
| 1-0 | 32 | 2004 | Muensterland Open | C11 French |
| 19. J Koller vs P Horvath |
| 0-1 | 25 | 2004 | Muensterland Open | B32 Sicilian |
| 20. M Mueller vs J Koller |
| 0-1 | 75 | 2004 | Muensterland Open | A48 King's Indian |
| 21. J Koller vs Y Solodovnichenko |
| 0-1 | 49 | 2004 | Muensterland Open | B81 Sicilian, Scheveningen, Keres Attack |
| 22. J Koller vs S Reschke |
| ½-½ | 34 | 2005 | Hessen-ch MT | B32 Sicilian |
| 23. J Koller vs P Enders |
| 0-1 | 28 | 2007 | German Championship | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
| 24. J Stanke vs J Koller |
| 1-0 | 30 | 2007 | German Championship | A10 English |
| 25. J Koller vs T Fischer |
| ½-½ | 49 | 2007 | German Championship | B33 Sicilian |
Kibitzing
