| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. G Koehler vs J Ambroz |
| 0-1 | 38 | 1974 | DDR-CSR U25 | A17 English |
| 2. G Koehler vs H Bastian |
| 0-1 | 54 | 2012 | 83rd ch-GER | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 3. G Koehler vs T Chapman |
| 1-0 | 43 | 2015 | World Senior Teams +50 | A34 English, Symmetrical |
| 4. M Bezold vs G Koehler |
| 1-0 | 28 | 2015 | World Blitz Championship | A15 English |
| 5. B Adhiban vs G Koehler |
| 1-0 | 33 | 2015 | World Blitz Championship | E76 King's Indian, Four Pawns Attack |
| 6. J Wendt vs G Koehler |
| 1-0 | 60 | 2015 | World Blitz Championship | E97 King's Indian |
| 7. G Koehler vs J Camacho Collados |
| 0-1 | 15 | 2015 | World Blitz Championship | A34 English, Symmetrical |
| 8. M Richter vs G Koehler |
| 1-0 | 23 | 2015 | World Blitz Championship | E81 King's Indian, Samisch |
| 9. G Koehler vs L Zepeda |
| 1-0 | 34 | 2015 | World Blitz Championship | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 10. M Godena vs G Koehler |
| 1-0 | 16 | 2015 | World Blitz Championship | C03 French, Tarrasch |
| 11. G Koehler vs R Lagunow |
| 0-1 | 25 | 2015 | World Blitz Championship | A25 English |
| 12. G Koehler vs L Valdes |
| 0-1 | 55 | 2015 | World Blitz Championship | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 13. J Carstensen vs G Koehler |
| 0-1 | 31 | 2015 | World Blitz Championship | E92 King's Indian |
| 14. G Koehler vs L Thiede |
| 0-1 | 67 | 2015 | World Blitz Championship | E94 King's Indian, Orthodox |
| 15. G Koehler vs M A Zaror Cordeiro |
| 0-1 | 39 | 2015 | World Blitz Championship | A25 English |
| 16. G Koehler vs J Carlstedt |
| 0-1 | 53 | 2015 | World Blitz Championship | A23 English, Bremen System, Keres Variation |
| 17. M Bruedigam vs G Koehler |
| 0-1 | 29 | 2015 | World Blitz Championship | C01 French, Exchange |
| 18. G Koehler vs W Przybylski |
| 0-1 | 44 | 2015 | World Blitz Championship | A22 English |
| 19. I Ben Artzi vs G Koehler |
| 1-0 | 27 | 2015 | World Blitz Championship | C03 French, Tarrasch |
| 20. G Koehler vs E Berend |
| ½-½ | 37 | 2015 | World Blitz Championship | A24 English, Bremen System with ...g6 |
| 21. A Hilverda vs G Koehler |
| 1-0 | 47 | 2015 | World Blitz Championship | D02 Queen's Pawn Game |
| 22. G Koehler vs J Stark |
| 1-0 | 68 | 2015 | World Blitz Championship | A21 English |
| 23. M Pavlovic vs G Koehler |
| 1-0 | 29 | 2015 | World Blitz Championship | C00 French Defense |
| 24. L Sawlin vs G Koehler |
| 1-0 | 28 | 2015 | World Blitz Championship | B42 Sicilian, Kan |
| 25. G Koehler vs E Prie |
| 0-1 | 34 | 2017 | World Senior 50+ | A22 English |
Kibitzing
