| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. N P Nielsen vs K Husak |
| 0-1 | 38 | 1962 | CSR corr | A95 Dutch, Stonewall |
| 2. J B Pedersen vs N P Nielsen |
| 0-1 | 17 | 1993 | Aalborg op | A57 Benko Gambit |
| 3. N P Nielsen vs I Sokolov |
| ½-½ | 44 | 1997 | Koge Open | B21 Sicilian, 2.f4 and 2.d4 |
| 4. Rozentalis vs N P Nielsen |
| 1-0 | 36 | 1997 | Koge Open | C05 French, Tarrasch |
| 5. N P Nielsen vs J H Hansen |
| 1-0 | 20 | 1997 | Koge Open | C29 Vienna Gambit |
| 6. J A Nilssen vs N P Nielsen |
| 1-0 | 35 | 1997 | Koge Open | A56 Benoni Defense |
| 7. N P Nielsen vs B Malekian |
| ½-½ | 24 | 1997 | Koge Open | B06 Robatsch |
| 8. A Paaske vs N P Nielsen |
| 0-1 | 48 | 1997 | Koge Open | C63 Ruy Lopez, Schliemann Defense |
| 9. N P Nielsen vs H El-Kher |
| ½-½ | 36 | 1997 | Koge Open | B22 Sicilian, Alapin |
| 10. N P Nielsen vs H Holmsgaard |
| 0-1 | 45 | 1997 | Koge Open | B22 Sicilian, Alapin |
| 11. L Petersen vs N P Nielsen |
| ½-½ | 51 | 1997 | Koge Open | A46 Queen's Pawn Game |
| 12. N P Nielsen vs C Rossen |
| 0-1 | 23 | 1999 | Politiken Cup | B45 Sicilian, Taimanov |
| 13. T Ronsted vs N P Nielsen |
| 1-0 | 11 | 1999 | Politiken Cup | A51 Budapest Gambit |
| 14. J Jensen vs N P Nielsen |
| 1-0 | 28 | 1999 | Politiken Cup | B00 Uncommon King's Pawn Opening |
| 15. N P Nielsen vs M Jorgensen |
| 1-0 | 30 | 1999 | Politiken Cup | B93 Sicilian, Najdorf, 6.f4 |
| 16. H Dalso vs N P Nielsen |
| 0-1 | 25 | 1999 | Politiken Cup | A46 Queen's Pawn Game |
| 17. N P Nielsen vs A Karlsen |
| 1-0 | 53 | 1999 | Politiken Cup | C25 Vienna |
| 18. A Bekker-Jensen vs N P Nielsen |
| 1-0 | 54 | 1999 | Politiken Cup | A51 Budapest Gambit |
| 19. N P Nielsen vs S Jessen |
| ½-½ | 34 | 1999 | Politiken Cup | C28 Vienna Game |
| 20. A Hansen vs N P Nielsen |
| 1-0 | 26 | 1999 | Politiken Cup | A45 Queen's Pawn Game |
| 21. N P Nielsen vs M Hansen |
| 0-1 | 43 | 1999 | Politiken Cup | B93 Sicilian, Najdorf, 6.f4 |
| 22. J Rosenberg vs N P Nielsen |
| 0-1 | 44 | 1999 | Politiken Cup | B13 Caro-Kann, Exchange |
| 23. N P Nielsen vs N Resika |
| 0-1 | 24 | 2000 | Politiken Cup | B07 Pirc |
| 24. T H Rubeksen vs N P Nielsen |
| 0-1 | 26 | 2000 | Politiken Cup | B70 Sicilian, Dragon Variation |
| 25. N P Nielsen vs L Petersen |
| 0-1 | 32 | 2000 | Politiken Cup | B01 Scandinavian |
Kibitzing
