| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. G Koehler vs J Arizmendi Martinez |
| ½-½ | 118 | 2019 | Gibraltar Masters | E67 King's Indian, Fianchetto |
| 27. Z Tan vs G Koehler |
| 1-0 | 21 | 2019 | Gibraltar Masters | E67 King's Indian, Fianchetto |
| 28. G Koehler vs I K Sukandar |
| 0-1 | 46 | 2019 | Gibraltar Masters | A20 English |
| 29. S Kozarcanin vs G Koehler |
| 0-1 | 29 | 2019 | Gibraltar Masters | A01 Nimzovich-Larsen Attack |
| 30. G Koehler vs P Lombaers |
| 0-1 | 33 | 2019 | Gibraltar Masters | E99 King's Indian, Orthodox, Taimanov |
| 31. R Herzwurm vs G Koehler |
| 0-1 | 33 | 2019 | Gibraltar Masters | B23 Sicilian, Closed |
| 32. G Koehler vs S Papp |
| 1-0 | 50 | 2019 | Gibraltar Masters | A25 English |
| 33. D Larino Nieto vs G Koehler |
| 1-0 | 73 | 2019 | Gibraltar Masters | A04 Reti Opening |
| 34. G Koehler vs M Fenollar Jorda |
| 0-1 | 26 | 2019 | Gibraltar Masters | A11 English, Caro-Kann Defensive System |
| 35. C Repka vs G Koehler |
| 1-0 | 65 | 2019 | Gibraltar Masters | A46 Queen's Pawn Game |
Kibitzing
