| Nov 22, 2025 | Nielsen | 1–0 | Pace | Round 9: Nielsen, Hogni Egilstoft - Pace, Colin | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Nov 21, 2025 | Nielsen | 1–0 | Holland | Round 8: Nielsen, Hogni Egilstoft - Holland, Christopher | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Nov 19, 2025 | Heron | 0–1 | Nielsen | Round 7: Heron, Andrew - Nielsen, Hogni Egilstoft | Modern Defense | |
| Nov 19, 2025 | Nielsen | ½–½ | Michaelides | Round 6: Nielsen, Hogni Egilstoft - Michaelides, Konstantinos | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Nov 17, 2025 | Nielsen | 1–0 | Kolin | Round 4: Nielsen, Hogni Egilstoft - Kolin, Mateusz | Petrov's Defense: Modern Attack | |
| Nov 17, 2025 | Ribera Veganzones | 1–0 | Nielsen | Round 3: Ribera Veganzones, Serni - Nielsen, Hogni Egilstoft | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Nov 16, 2025 | Nielsen | 1–0 | Berend | Round 2: Nielsen, Hogni Egilstoft - Berend, Fred | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Nov 15, 2025 | Ribbegren | 0–1 | Nielsen | Round 1: Ribbegren, Karl Johan - Nielsen, Hogni Egilstoft | Nimzo-Larsen Attack: Indian Variation | |
| Oct 14, 2025 | Makharadze | ½–½ | Nielsen | Round 9: Makharadze, Jambul - Nielsen, Hogni Egilstoft | English Opening: Symmetrical Variation, Anti-Benoni Variation | |
| Oct 13, 2025 | Nielsen | ½–½ | Sousa | Round 8: Nielsen, Hogni Egilstoft - Sousa, Andre Ventura | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Oct 12, 2025 | Nielsen | ½–½ | Stefansson | Round 7: Nielsen, Hogni Egilstoft - Stefansson, Vignir Vatnar | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Oct 10, 2025 | kiladze | 1–0 | Nielsen | Round 6: kiladze, Luka - Nielsen, Hogni Egilstoft | Rapport-Jobava System | |
| Oct 9, 2025 | Waldhausen Gordon | ½–½ | Nielsen | Round 5: Waldhausen Gordon, Frederick - Nielsen, Hogni Egilstoft | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Oct 8, 2025 | Nielsen | ½–½ | Keinanen | Round 4: Nielsen, Hogni Egilstoft - Keinanen, Toivo | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Oct 7, 2025 | Nemeth | ½–½ | Nielsen | Round 3: Nemeth, Zalan - Nielsen, Hogni Egilstoft | Benoni Defense: Fianchetto Variation | |
| Oct 6, 2025 | Nielsen | ½–½ | Kazakouski | Round 2: Nielsen, Hogni Egilstoft - Kazakouski, Valery | Sicilian Defense: Moscow Variation | |
| Oct 5, 2025 | Nielsen | 0–1 | Brkic | Round 1: Nielsen, Hogni Egilstoft - Brkic, Ante | Sicilian Defense: Moscow Variation | |
| May 4, 2025 | Nielsen | 0–1 | Carbonell Sancho | Round 6: Nielsen, Hogni Egilstoft - Carbonell Sancho, Marc | Sicilian Defense: Dragon Variation, Classical Variation | |
| May 4, 2025 | Sanchez Saez | 1–0 | Nielsen | Round 7: Sanchez Saez, Francisco - Nielsen, Hogni Egilstoft | English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense | |
| May 3, 2025 | Nielsen | ½–½ | Ilinca | Round 4: Nielsen, Hogni Egilstoft - Ilinca, Felix-Antonio | Caro-Kann Defense: Two Knights Attack | |
| May 3, 2025 | Sos Andreu | 1–0 | Nielsen | Round 5: Sos Andreu, Eric - Nielsen, Hogni Egilstoft | King's Indian Defense: Orthodox Variation | |
| May 2, 2025 | Komljenovic | 0–1 | Nielsen | Round 3: Komljenovic, Davorin - Nielsen, Hogni Egilstoft | King's Indian Attack: Keres Variation | |
| May 1, 2025 | Nielsen | 1–0 | Ibanez Aullana | Round 2: Nielsen, Hogni Egilstoft - Ibanez Aullana, Ramon | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| May 1, 2025 | Moreto Quintana | 0–1 | Nielsen | Round 1: Moreto Quintana, Alex - Nielsen, Hogni Egilstoft | Bogo-Indian Defense: Grünfeld Variation | |
| Sep 22, 2024 | Nguyen | 1–0 | Nielsen | 45th FIDE Chess Olympiad | Queen's Indian Defense: Riumin Variation | |
| Sep 21, 2024 | Nielsen | ½–½ | Cheng | 45th FIDE Chess Olympiad | Sicilian Defense: Moscow Variation | |
| Sep 20, 2024 | Wiedenkeller | ½–½ | Nielsen | 45th FIDE Chess Olympiad | Catalan Opening | |
| Sep 19, 2024 | Peng | ½–½ | Nielsen | 45th FIDE Chess Olympiad | Catalan Opening: Closed | |
| Sep 18, 2024 | Nielsen | 1–0 | Ahn | 45th FIDE Chess Olympiad | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Sep 16, 2024 | Demchenko | ½–½ | Nielsen | 45th FIDE Chess Olympiad | Italian Game: Giuoco Pianissimo, Normal | |
| Sep 15, 2024 | Al-Ali | 0–1 | Nielsen | 45th FIDE Chess Olympiad | Four Knights Game: Glek System | |
| Sep 14, 2024 | Shevchenko | 1–0 | Nielsen | 45th FIDE Chess Olympiad | Tarrasch Defense: Symmetrical Variation | |
| Sep 13, 2024 | Nielsen | 1–0 | Seder | 45th FIDE Chess Olympiad | French Defense: Two Knights Variation | |
| Sep 12, 2024 | Gurel | 1–0 | Nielsen | 45th FIDE Chess Olympiad | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Sep 11, 2024 | Gabriel | 0–1 | Nielsen | 45th FIDE Chess Olympiad | Scotch Game: Mieses Variation | |
| Mar 30, 2024 | Nielsen | ½–½ | Egilstoft | FM 2024 Umdystur (kvik) | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Mar 30, 2024 | Nielsen | 0–1 | Apol | FM 2024 Umdystur (kvik) | Nimzo-Larsen Attack: Modern Variation | |
| Mar 30, 2024 | Apol | 1–0 | Nielsen | FM 2024 Umdystur (kvik) | Ruy Lopez: Closed, Pilnik Variation | |
| Mar 30, 2024 | Egilstoft | 0–1 | Nielsen | FM 2024 Umdystur (kvik) | Modern Defense | |
| Mar 29, 2024 | Nielsen | 0–1 | Apol | FM 2024 Landsliðsbólkur | Sicilian Defense: Alapin Variation | |
| Mar 28, 2024 | Egilstoft | 0–1 | Nielsen | FM 2024 Landsliðsbólkur | Pterodactyl Defense: Eastern, Anhanguera | |
| Mar 27, 2024 | Nielsen | 1–0 | Petersen | FM 2024 Landsliðsbólkur | Sicilian Defense: Moscow Variation, Sokolsky Variation | |
| Mar 26, 2024 | Nielsen | ½–½ | Nielsen | FM 2024 Landsliðsbólkur | Pirc Defense: Austrian Attack, Weiss Variation | |
| Mar 25, 2024 | Wiberg | 0–1 | Nielsen | FM 2024 Landsliðsbólkur | Benoni Defense: Old Benoni | |
| Mar 24, 2024 | Nielsen | 1–0 | Gregersen | FM 2024 Landsliðsbólkur | Sicilian Defense: Mengarini Variation | |
| Mar 23, 2024 | Simonsen | 0–1 | Nielsen | FM 2024 Landsliðsbólkur | Modern Defense: Standard Defense | |
| Nov 20, 2023 | Nielsen | 0–1 | Pasko | European Team Championship | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |
| Nov 19, 2023 | Saraci | 1–0 | Nielsen | European Team Championship | King's Indian Defense: Fianchetto Variation, Simagin Variation | |
| Nov 18, 2023 | Sipila | ½–½ | Nielsen | European Team Championship | Ruy Lopez: Cozio Defense | |
| Nov 17, 2023 | Nielsen | ½–½ | Tomic | European Team Championship | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Nov 15, 2023 | Muir | 0–1 | Nielsen | European Team Championship | Nimzo-Indian Defense: Normal Variation | |
| Nov 14, 2023 | Nielsen | ½–½ | Kalezic | European Team Championship | French Defense: Two Knights Variation | |
| Nov 13, 2023 | Nikolovski | ½–½ | Nielsen | European Team Championship | Four Knights Game: Spanish Variation, Nimzowitsch Variation | |
| Nov 12, 2023 | Nielsen | ½–½ | Georgiadis | European Team Championship | Sicilian Defense: Moscow Variation | |
| Nov 11, 2023 | Nielsen | 0–1 | Theodorou | European Team Championship | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jul 11, 2023 | Fizerova | 1–0 | Livnansky | Piestany B | King's Indian Attack | |
| Jul 19, 2023 | Luong Phuong Hanh | ½–½ | Nielsen Hogni Egilstoft | Open A | Indian Defense: Przepiorka Variation | |
| Jul 17, 2023 | Nielsen Hogni Egilstoft | 1–0 | Gaurav Rajesh Zagade | Open A | Nimzo-Larsen Attack: Indian Variation | |
| Jul 17, 2023 | Nielsen Hogni Egilstoft | ½–½ | Vemparala Nikash | Open A | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Jul 16, 2023 | Jaiveer Mahendru | ½–½ | Nielsen Hogni Egilstoft | Open A | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Jul 15, 2023 | Lecky Juraj | 1–0 | Nielsen Hogni Egilstoft | Open A | Modern Defense: Kotov Variation | |
| Jul 14, 2023 | Nielsen Hogni Egilstoft | ½–½ | Dere Pushkar | Open A | Hungarian Opening | |
| Jul 13, 2023 | Babula Vlastimil | 1–0 | Nielsen Hogni Egilstoft | Open A | Modern Defense: Standard Defense | |
| Jul 12, 2023 | Nielsen Hogni Egilstoft | ½–½ | Egilstoft Rogvi | Open A | Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Alatortsev-Lisitsyn Line | |
| Jul 11, 2023 | Fizer Marek | 0–1 | Nielsen Hogni Egilstoft | Open A | French Defense: St. George Defense | |