| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. P Roth vs H Koller |
| 1-0 | 27 | 1996 | Schlechter Memorial | B43 Sicilian, Kan, 5.Nc3 |
| 27. H Koller vs G Danner |
| 0-1 | 42 | 1996 | Schlechter Memorial | A00 Uncommon Opening |
| 28. H Groetz vs H Koller |
| 1-0 | 35 | 1996 | Schlechter Memorial | C97 Ruy Lopez, Closed, Chigorin |
| 29. H Koller vs G Zetthofer |
| ½-½ | 29 | 1996 | Schlechter Memorial | D35 Queen's Gambit Declined |
| 30. R Hangweyrer vs H Koller |
| 1-0 | 39 | 1996 | Schlechter Memorial | A10 English |
| 31. H Koller vs M Steinert |
| 1-0 | 37 | 1996 | Schlechter Memorial | A06 Reti Opening |
| 32. O Vodep vs H Koller |
| ½-½ | 6 | 1996 | Schlechter Memorial | D14 Queen's Gambit Declined Slav, Exchange Variation |
| 33. H Hecht vs H Koller |
| ½-½ | 29 | 1997 | Schwarzach Open-A | D35 Queen's Gambit Declined |
| 34. H Koller vs V Hresc |
| 0-1 | 42 | 1997 | Schwarzach Open-A | D02 Queen's Pawn Game |
| 35. K Haeusler vs H Koller |
| ½-½ | 58 | 1997 | Schwarzach Open-A | A07 King's Indian Attack |
| 36. H Koller vs J Dudas |
| 0-1 | 48 | 2000 | Frohnleiten op | B20 Sicilian |
| 37. H Scherer vs H Koller |
| 1-0 | 50 | 2002 | Bad Woerishofen Open | C41 Philidor Defense |
| 38. H Koller vs W Kugelmann |
| 1-0 | 66 | 2002 | Bad Woerishofen Open | D02 Queen's Pawn Game |
| 39. G Loew vs H Koller |
| 1-0 | 52 | 2002 | Bad Woerishofen Open | A15 English |
| 40. L Olzem vs H Koller |
| ½-½ | 34 | 2002 | Bad Woerishofen Open | A35 English, Symmetrical |
| 41. H Koller vs P Schoenberger |
| 1-0 | 52 | 2002 | Bad Woerishofen Open | A48 King's Indian |
| 42. W Szenetra vs H Koller |
| ½-½ | 61 | 2002 | Bad Woerishofen Open | A07 King's Indian Attack |
| 43. H Koller vs D Riegler |
| ½-½ | 32 | 2002 | Bad Woerishofen Open | A48 King's Indian |
| 44. H Koller vs S Galdunts |
| 0-1 | 54 | 2004 | Bad Woerishofen op 20th | A00 Uncommon Opening |
| 45. S Steccanella vs H Koller |
| 0-1 | 37 | 2004 | Cesenatico Open | C46 Three Knights |
| 46. H Koller vs C Di Caro |
  | 0-1 | 9 | 2004 | Cesenatico Open | A41 Queen's Pawn Game (with ...d6) |
| 47. A Vincenzi vs H Koller |
| 1-0 | 45 | 2004 | Cesenatico Open | B00 Uncommon King's Pawn Opening |
| 48. H Koller vs G Del Vecchio |
| 1-0 | 56 | 2004 | Cesenatico Open | E77 King's Indian |
| 49. G Elbert vs H Koller |
| 0-1 | 35 | 2004 | Cesenatico Open | A43 Old Benoni |
| 50. H Koller vs F Bentivegna |
| ½-½ | 47 | 2004 | Cesenatico Open | D07 Queen's Gambit Declined, Chigorin Defense |
Kibitzing
