| May 24, 2026 | Krupa | 1–0 | Nielsen | DM i Hurtigskak for hold | French Defense: Tarrasch Variation, Guimard Defense, Main Line | |
| May 24, 2026 | Kokholm | 0–1 | Nielsen | DM i Hurtigskak for hold | French Defense: Alapin Gambit | |
| May 24, 2026 | Nielsen | 0–1 | Jalving | DM i Hurtigskak for hold | Pirc Defense | |
| May 24, 2026 | Nielsen | ½–½ | Andries | DM i Hurtigskak for hold | Sicilian Defense: Alapin Variation, Barmen Defense | |
| May 24, 2026 | Jensen | 1–0 | Nielsen | DM i Hurtigskak for hold | Horwitz Defense | |
| May 24, 2026 | Nielsen | 1–0 | Wolf | DM i Hurtigskak for hold | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Jan 25, 2026 | Nielsen | 1–0 | Wilbrandt | Nordkalotten - Frem | Sicilian Defense: Alapin Variation | |
| Jan 24, 2026 | Moller | ½–½ | Nielsen | SK1968 - Nordkalotten | Sicilian Defense: Alapin Variation, Stoltz Attack | |
| Nov 23, 2025 | Jaksland | ½–½ | Nielsen | Hillerød - Nordkalotten | Sicilian Defense: Alapin Variation | |
| Nov 16, 2025 | Olsen | 0–1 | Nielsen | Atina Open 2025 | French Defense: King's Indian Attack | |
| Nov 16, 2025 | Nielsen | ½–½ | Lauridsen | Atina Open 2025 | Sicilian Defense: Alapin Variation | |
| Nov 15, 2025 | Loftgaard | ½–½ | Nielsen | Atina Open 2025 | French Defense: Tarrasch Variation, Guimard Defense, Main Line | |
| Nov 15, 2025 | Nielsen | 1–0 | Skovgaard | Atina Open 2025 | Sicilian Defense: Alapin Variation | |
| Nov 14, 2025 | Jaksland | ½–½ | Nielsen | Atina Open 2025 | French Defense: Exchange Variation | |
| Nov 14, 2025 | Nielsen | 1–0 | Moustgaard | Atina Open 2025 | Pirc Defense | |
| Nov 2, 2025 | Moeller | ½–½ | Nielsen | Fredericia - Nordkalotten | Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense | |
| Nov 1, 2025 | Nielsen | ½–½ | Brondt | Nordkalotten - Skanderborg | Sicilian Defense: Delayed Alapin Variation | |
| Oct 24, 2025 | Sakalauskas | ½–½ | Nielsen | Round 6: Sakalauskas, Vaidas - Nielsen, Lars Aaes | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Oct 20, 2025 | Nielsen | 0–1 | Cvitan | Round 2: Nielsen, Lars Aaes - Cvitan, Ognjen | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Mar 30, 2025 | Nielsen | ½–½ | Kakulidis | Nordkalotten - OBRO | Caro-Kann Defense: Panov Attack, Modern Defense | |
| Nov 3, 2024 | Holm | 0–1 | Nielsen | Nordkalotten - Nordre | French Defense: Advance Variation, Paulsen Attack | |
| Nov 2, 2024 | Nielsen | 0–1 | Guindy | Fredericia - Nordkalotten | French Defense: Burn Variation | |
| Oct 25, 2024 | Petrovska | 0–1 | Nielsen | 39th European Chess Club Cup | French Defense: Exchange Variation | |
| Oct 24, 2024 | Nielsen | 1–0 | Schmidt | 39th European Chess Club Cup | Nimzo-Larsen Attack: Classical Variation | |
| Oct 23, 2024 | Tsarsitalidis | ½–½ | Nielsen | 39th European Chess Club Cup | French Defense: Tarrasch Variation, Guimard Defense, Main Line | |
| Oct 22, 2024 | Nielsen | 1–0 | Lachaert | 39th European Chess Club Cup | Caro-Kann Defense: Panov Attack | |
| Oct 20, 2024 | Nielsen | 1–0 | Jokic | 39th European Chess Club Cup | Vienna Game: Stanley Variation | |
| Apr 6, 2024 | Christensen | ½–½ | Nielsen | Nordkalotten - SK1968 | Horwitz Defense | |
| Oct 29, 2023 | Nielsen | ½–½ | Nordenbaek | Nordkalotten - Hillerød | Italian Game: Two Knights Defense, Perreux Variation | |
| Oct 28, 2023 | Tettinek | 0–1 | Nielsen | Århus/Skolerne - Nordkalotten | Horwitz Defense | |
| Oct 3, 2023 | Storme | 1–0 | Nielsen | European Chess Club Cup 2023 | Catalan Opening: Open Defense, Classical Line | |
| May 14, 2023 | Nielsen | 0–1 | Hansen | DM i Lynskak | Sicilian Defense: Delayed Alapin Variation | |
| May 14, 2023 | Nielsen | 0–1 | Hoi | DM i Lynskak | Modern Defense | |
| May 14, 2023 | Nielsen | 1–0 | Nielsen | DM i Lynskak | English Defense | |
| May 13, 2023 | Nielsen | 0–1 | Olsen | DM i Hurtigskak 2023 | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| May 13, 2023 | Hagen | 1–0 | Nielsen | DM i Hurtigskak 2023 | French Defense: Winawer Variation, Petrosian Variation | |
| Jan 14, 2023 | Pedersen | 0–1 | Nielsen | match 5 | English Opening | |
| Dec 30, 2022 | Nielsen | ½–½ | Meskenas | New years tournament. 7 rounds Swiss. | Ruy Lopez: Exchange Variation, Gligoric Variation | |
| Dec 30, 2022 | Iskos | 0–1 | Nielsen | New years tournament. 7 rounds Swiss. | Pseudo Queen's Indian Defense | |
| Dec 30, 2022 | Olsen | ½–½ | Nielsen | New years tournament. 7 rounds Swiss. | Queen's Pawn Game | |
| Dec 29, 2022 | Nielsen | ½–½ | Lauritsen | New years tournament. 7 rounds Swiss. | Sicilian Defense: Alapin Variation | |
| Dec 28, 2022 | Nielsen | 1–0 | Nielsen | New years tournament. 7 rounds Swiss. | Queen's Gambit Declined | |
| Dec 27, 2022 | Vehl | 0–1 | Nielsen | New years tournament. 7 rounds Swiss. | French Defense: Schlechter Variation | |