| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. H Koller vs M Aigmueller |
| ½-½ | 21 | 1986 | corr | D85 Grunfeld |
| 2. C Reinoehl vs H Koller |
| ½-½ | 52 | 1988 | Hallein Open | B60 Sicilian, Richter-Rauzer |
| 3. W Flecker vs H Koller |
| 0-1 | 44 | 1988 | Hallein Open | A07 King's Indian Attack |
| 4. H Koller vs Z Hurnik |
| 0-1 | 37 | 1988 | Hallein Open | A46 Queen's Pawn Game |
| 5. R Lendwai vs H Koller |
| 1-0 | 23 | 1988 | Hallein Open | B00 Uncommon King's Pawn Opening |
| 6. H Koller vs G Barbero |
| 0-1 | 35 | 1990 | Brocco Open | A48 King's Indian |
| 7. H Koller vs H Pronold |
| ½-½ | 24 | 1991 | Werfen Open-A | D02 Queen's Pawn Game |
| 8. H Koller vs Korneev |
| 0-1 | 39 | 1992 | Cattolica op | E06 Catalan, Closed, 5.Nf3 |
| 9. L Gyorkos vs H Koller |
| ½-½ | 38 | 1993 | Loosdorf Open | A57 Benko Gambit |
| 10. H Koller vs H Ganaus |
| ½-½ | 87 | 1993 | Loosdorf Open | A01 Nimzovich-Larsen Attack |
| 11. H Koller vs M Keller |
| ½-½ | 13 | 1994 | Finkenstein Open | D02 Queen's Pawn Game |
| 12. L Kiss vs H Koller |
| 0-1 | 41 | 1994 | Finkenstein Open | B06 Robatsch |
| 13. H Koller vs W Csrnko |
| 1-0 | 28 | 1994 | Finkenstein Open | A00 Uncommon Opening |
| 14. H Koller vs G Fuchs |
| ½-½ | 41 | 1994 | Finkenstein Open | A00 Uncommon Opening |
| 15. H Koller vs G Kuba |
| 0-1 | 48 | 1994 | Finkenstein Open | D02 Queen's Pawn Game |
| 16. T Kos vs H Koller |
| ½-½ | 18 | 1994 | Finkenstein Open | B06 Robatsch |
| 17. K Schein vs H Koller |
| 1-0 | 27 | 1994 | Finkenstein Open | B90 Sicilian, Najdorf |
| 18. W Stadik vs H Koller |
| 0-1 | 37 | 1994 | Finkenstein Open | A07 King's Indian Attack |
| 19. M Brodsky vs H Koller |
| 1-0 | 29 | 1995 | Oberwart Open | B01 Scandinavian |
| 20. K Znamenacek vs H Koller |
| ½-½ | 61 | 1995 | Oberwart Open | A12 English with b3 |
| 21. H Koller vs S Sale |
| ½-½ | 54 | 1995 | Oberwart Open | E90 King's Indian |
| 22. E Anka vs H Koller |
| 1-0 | 46 | 1995 | Oberwart Open | B06 Robatsch |
| 23. H Kummer vs H Koller |
| 1-0 | 34 | 1995 | Oberwart Open | A41 Queen's Pawn Game (with ...d6) |
| 24. O Palos vs H Koller |
| ½-½ | 49 | 1996 | Schlechter Memorial | A40 Queen's Pawn Game |
| 25. H Koller vs M Sader |
| ½-½ | 18 | 1996 | Schlechter Memorial | A02 Bird's Opening |
Kibitzing
