| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. B Malekian vs N Petersen |
| 1-0 | 51 | 1997 | Koge Open | D45 Queen's Gambit Declined Semi-Slav |
| 27. N Petersen vs T Kristensen |
| 1-0 | 35 | 1997 | Koge Open | A15 English |
| 28. J H Hansen vs N Petersen |
| 0-1 | 40 | 1997 | Koge Open | B44 Sicilian |
| 29. B Jorgensen vs N Petersen |
| 1-0 | 60 | 1997 | Koge Open | D45 Queen's Gambit Declined Semi-Slav |
| 30. N Petersen vs A Bering |
| ½-½ | 55 | 1997 | Koge Open | A20 English |
| 31. N Petersen vs H D Pedersen |
| ½-½ | 53 | 1997 | Koge Open | A00 Uncommon Opening |
| 32. N Petersen vs P H Nielsen |
| 0-1 | 32 | 1998 | Politiken Cup | D75 Neo-Grunfeld, 6.cd Nxd5, 7.O-O c5, 8.dxc5 |
| 33. L Gretarsdottir vs N Petersen |
| 0-1 | 40 | 1998 | Politiken Cup | B32 Sicilian |
| 34. N Petersen vs N Palm |
| 0-1 | 48 | 1998 | Politiken Cup | A21 English |
| 35. H R Omarsson vs N Petersen |
| 1-0 | 87 | 1998 | Politiken Cup | D50 Queen's Gambit Declined |
| 36. N K Kragh vs N Petersen |
| ½-½ | 35 | 1998 | Politiken Cup | B33 Sicilian |
| 37. N Petersen vs E Auchenberg |
| 1-0 | 36 | 1998 | Politiken Cup | A25 English |
| 38. S Steindorsson vs N Petersen |
| 1-0 | 33 | 1998 | Politiken Cup | A38 English, Symmetrical |
| 39. N Petersen vs K White |
| 1-0 | 57 | 1998 | Politiken Cup | A10 English |
| 40. S Steffensen vs N Petersen |
| 1-0 | 34 | 1998 | Politiken Cup | A35 English, Symmetrical |
| 41. N Petersen vs S T Wilhelmsson |
| 1-0 | 87 | 1998 | Politiken Cup | A30 English, Symmetrical |
| 42. G Petursson vs N Petersen |
| 1-0 | 55 | 1998 | Politiken Cup | D30 Queen's Gambit Declined |
| 43. M F Olsen vs N Petersen |
| 0-1 | 65 | 1999 | Politiken Cup | D50 Queen's Gambit Declined |
| 44. N Petersen vs D Bekker-Jensen |
| 0-1 | 54 | 1999 | Politiken Cup | A16 English |
| 45. T Lynge vs N Petersen |
| 0-1 | 64 | 1999 | Politiken Cup | B88 Sicilian, Fischer-Sozin Attack |
| 46. N Petersen vs M Lyell |
| 0-1 | 36 | 1999 | Politiken Cup | A10 English |
| 47. I Birgisdottir vs N Petersen |
| ½-½ | 31 | 1999 | Politiken Cup | B30 Sicilian |
| 48. N Petersen vs K Skare |
| 0-1 | 42 | 1999 | Politiken Cup | A35 English, Symmetrical |
| 49. L H Bjarnason vs N Petersen |
| 0-1 | 59 | 1999 | Politiken Cup | D50 Queen's Gambit Declined |
| 50. N Petersen vs B H Nielsen |
| 0-1 | 34 | 1999 | Politiken Cup | A13 English |
Kibitzing
