| Apr 19, 2026 | Stefansson | ½–½ | Cieslak | EICC 2026 | Queen's Gambit Declined: Three Knights Variation | |
| Apr 18, 2026 | Petriashvili | ½–½ | Stefansson | EICC 2026 | Anderssen's Opening | |
| Apr 16, 2026 | Stefansson | ½–½ | Maksimovic | EICC 2026 | French Defense: Winawer Variation, Advance Variation | |
| Apr 15, 2026 | Rekuc | 0–1 | Stefansson | EICC 2026 | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Apr 14, 2026 | Stefansson | 0–1 | Kempinski | EICC 2026 | Queen's Indian Defense: Classical Variation, Traditional Variation, Main Line | |
| Apr 13, 2026 | Nakonechnyi | 0–1 | Stefansson | EICC 2026 | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Apr 12, 2026 | Stefansson | 1–0 | Starosta | EICC 2026 | Zukertort Opening | |
| Apr 10, 2026 | Rudzinska | ½–½ | Stefansson | EICC 2026 | Caro-Kann Defense: Advance Variation | |
| Apr 9, 2026 | Stefansson | ½–½ | Kosmas-Lekkas | EICC 2026 | King's Indian Attack: Symmetrical Defense | |
| Apr 8, 2026 | Indjic | 1–0 | Stefansson | EICC 2026 | Nimzo-Indian Defense: Classical Variation | |
| Apr 7, 2026 | Stefansson | 1–0 | Pozimski | EIIC 2026 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Mar 31, 2026 | Stefansson | 0–1 | Lagarde | Reykjavik Open 2026 | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Mar 30, 2026 | Stefansson | 1–0 | ADU | Reykjavik Open 2026 | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Mar 29, 2026 | Rutkowski | 0–1 | Stefansson | Reykjavik Open 2026 | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Mar 28, 2026 | Stefansson | ½–½ | Schmid | Reykjavik Open 2026 | Ruy Lopez: Closed, Martinez Variation | |
| Mar 27, 2026 | Mannion | ½–½ | Stefansson | Reykjavik Open 2026 | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | |
| Mar 26, 2026 | Stefansson | ½–½ | Birkisson | Reykjavik Open 2026 | Ruy Lopez: Closed, Martinez Variation | |
| Mar 25, 2026 | Stevens | 0–1 | Stefansson | Reykjavik Open 2026 | Sicilian Defense: Closed | |
| Mar 8, 2026 | Thorhallsson | 0–1 | Stefansson | Icelandic team chess championship premier league | Hungarian Opening | |
| Mar 7, 2026 | Stefansson | ½–½ | Birkisson | Icelandic team chess championship premier league | Zukertort Opening | |
| Mar 7, 2026 | Laurusas | 1–0 | Stefansson | Icelandic team chess championship premier league | Nimzo-Indian Defense: Normal Variation, Classical Defense | |
| Mar 6, 2026 | Stefansson | ½–½ | Sulypa | Icelandic team chess championship premier league | Ruy Lopez: Closed | |
| Mar 5, 2026 | Olafsson | ½–½ | Stefansson | Icelandic team chess championship premier league | Semi-Slav Defense | |
| Jan 23, 2026 | Otsuka | ½–½ | Stefansson | Marienbad Open 2026 | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jan 22, 2026 | Stefansson | ½–½ | Heinrich | Marienbad Open 2026 | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Jan 21, 2026 | Dahl | ½–½ | Stefansson | Marienbad Open 2026 | Nimzo-Indian Defense: Normal Variation, Classical Defense | |
| Jan 20, 2026 | Stefansson | 0–1 | Itgelt | Marienbad Open 2026 | Bogo-Indian Defense: Vitolins Variation | |
| Jan 20, 2026 | Kairbekova | 1–0 | Stefansson | Marienbad Open 2026 | Scotch Game: Scotch Gambit, Advance Variation | |
| Jan 19, 2026 | Stefansson | 1–0 | Besou | Marienbad Open 2026 | King's Indian Defense: Fianchetto Variation, Immediate Fianchetto | |
| Jan 18, 2026 | Ricken | ½–½ | Stefansson | Marienbad Open 2026 | Zukertort Opening: Sicilian Invitation | |
| Jan 17, 2026 | Stefansson | * | Korobov | Marienbad Open 2026 | ? | |
| Jan 17, 2026 | Stefansson | ½–½ | Cvek | Marienbad Open 2026 | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Quiet Line | |
| Dec 7, 2025 | Stefansson | 1–0 | Ragnarsson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | English Opening: Symmetrical Variation | |
| Dec 7, 2025 | Stefansson | 1–0 | Hardarson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid | |
| Dec 7, 2025 | Olafsson | 0–1 | Stefansson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Trompowsky Attack | |
| Dec 7, 2025 | Stefansson | 1–0 | Heidarsson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Sicilian Defense: Moscow Variation, Main Line | |
| Dec 7, 2025 | Hjartarson | 1–0 | Stefansson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Sicilian Defense: Boleslavsky Variation | |
| Dec 7, 2025 | Stefansson | 1–0 | Thorfinnsson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Sicilian Defense: Moscow Variation | |
| Dec 7, 2025 | Bjornsson | 0–1 | Stefansson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Dec 7, 2025 | Thorhallsson | 0–1 | Stefansson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Dec 7, 2025 | Stefansson | 1–0 | Skarphedinsson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Catalan Opening: Open Defense, Classical Line | |
| Dec 7, 2025 | Kolka | 0–1 | Stefansson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Scandinavian Defense: Richter Variation | |
| Dec 7, 2025 | Stefansson | 1–0 | Gretarsson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Pirc Defense | |
| Dec 6, 2025 | Stefansson | ½–½ | Stefansson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation | |
| Dec 6, 2025 | Stefansson | 0–1 | Thorfinnsson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Ruy Lopez: Cozio Defense | |
| Dec 4, 2025 | Thorfinnsson | 0–1 | Stefansson | Icelandic team chess championship premier league | Italian Game: Two Knights Defense, Polerio Defense, Kieseritzky Variation | |
| Nov 16, 2025 | Thorarinsson | 0–1 | Stefansson | Icelandic team chess championship premier league | Caro-Kann Defense: Panov Attack, Main Line | |
| Nov 15, 2025 | Stefansson | 1–0 | Briem | Icelandic team chess championship premier league | English Opening: Agincourt Defense | |
| Nov 15, 2025 | Ragnarsson | ½–½ | Stefansson | Icelandic team chess championship premier league | Queen's Gambit Declined: Exchange Variation, Sämisch Variation | |
| Nov 14, 2025 | Stefansson | 1–0 | Johannesson | Icelandic team chess championship premier league | French Defense: Winawer Variation, Eingorn Variation | |
| Oct 14, 2025 | Andersen | 1–0 | Stefansson | Round 9: Andersen, Mads - Stefansson, Hannes | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Oct 13, 2025 | Stefansson | ½–½ | Sokolovsky | Round 8: Stefansson, Hannes - Sokolovsky, Yahli | Semi-Slav Defense | |
| Oct 12, 2025 | Stefansson | 1–0 | Poulsen | Round 7: Stefansson, Hannes - Poulsen, Martin | Dutch Defense: Leningrad Variation, Warsaw Variation | |
| Oct 10, 2025 | Stefansson | 1–0 | Sammalvuo | Round 6: Stefansson, Hannes - Sammalvuo, Tapani | Petrov's Defense: Millennium Attack | |
| Oct 9, 2025 | Ragger | ½–½ | Stefansson | Round 5: Ragger, Markus - Stefansson, Hannes | Ruy Lopez: Berlin Defense | |
| Oct 8, 2025 | Diasamidze | 0–1 | Stefansson | Round 4: Diasamidze, Lulu - Stefansson, Hannes | Sicilian Defense: Classical Variation | |
| Oct 6, 2025 | Stefansson | 0–1 | Petkov | Round 2: Stefansson, Hannes - Petkov, Momchil | Queen's Gambit Declined: Barmen Variation | |
| Oct 5, 2025 | Kosakowski | ½–½ | Stefansson | Round 1: Kosakowski, Jakub - Stefansson, Hannes | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jul 6, 2025 | Anuj Shrivatri | 1–0 | Stefansson | gmb | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Jul 5, 2025 | Stefansson | 0–1 | Hrbek | gmb | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jul 4, 2025 | Polak | ½–½ | Stefansson | gmb | Queen's Gambit Declined: Semi-Tarrasch Defense | |
| Jul 3, 2025 | Stefansson | 1–0 | Mica | gmb | French Defense: Winawer Variation, Advance Variation | |
| Jul 1, 2025 | Rakshitta Ravi | ½–½ | Stefansson | gmb | Four Knights Game: Scotch Variation Accepted | |
| Jun 30, 2025 | Stefansson | 0–1 | Ernst | gmb | Sicilian Defense: Najdorf Variation, English Attack | |
| Jun 29, 2025 | Svanda | 1–0 | Stefansson | gmb | Ruy Lopez: Closed, Anti-Marshall | |
| Jun 28, 2025 | Stefansson | ½–½ | Kraus | gmb | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jun 25, 2025 | Stefansson | 1–0 | Simek | gmb | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Jun 21, 2025 | Birkisson | 0–1 | Stefansson | Icelandic Open 2025 | Caro-Kann Defense: Endgame Offer | |
| Jun 20, 2025 | Petursson | 0–1 | Stefansson | Icelandic Open 2025 | Catalan Opening | |
| Jun 20, 2025 | Stefansson | 0–1 | Sokolov | Icelandic Open 2025 | Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid | |
| Jun 19, 2025 | Stefansson | ½–½ | Kjartansson | Icelandic Open 2025 | Queen's Gambit Declined: Vienna Variation, Quiet Variation | |
| Jun 18, 2025 | Stefansson | ½–½ | Stefansson | Icelandic Open 2025 | Tarrasch Defense: Symmetrical Variation | |
| Jun 18, 2025 | Stefansson | 1–0 | Domalchuk-Jonasson | Icelandic Open 2025 | French Defense: Winawer Variation, Retreat Variation | |
| Jun 17, 2025 | Bjornsson | 0–1 | Stefansson | Icelandic Open 2025 | Italian Game: Two Knights Defense, Colman Variation | |
| Jun 16, 2025 | Stefansson | 1–0 | Ptacnikova | Icelandic Open 2025 | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Jun 15, 2025 | Schitco | ½–½ | Stefansson | Icelandic Open 2025 | Ruy Lopez: Closed | |
| May 28, 2025 | Stefansson | ½–½ | Raczek | Chess Week in Przeworsk 2025 | Queen's Gambit Declined: Ragozin Defense | |
| May 26, 2025 | Szustakowski | ½–½ | Stefansson | Chess Week in Przeworsk 2025 | Queen's Indian Defense: Spassky System | |
| May 26, 2025 | Stefansson | ½–½ | Baum | Chess Week in Przeworsk 2025 | Queen's Gambit Declined: Ragozin Defense | |
| May 25, 2025 | Petrovskiy | ½–½ | Stefansson | Chess Week in Przeworsk 2025 | Scotch Game: Scotch Gambit, Advance Variation | |
| May 24, 2025 | Stefansson | ½–½ | Chatalbashev | Chess Week in Przeworsk 2025 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| May 23, 2025 | Vantika Agrawal | 1–0 | Stefansson | Chess Week in Przeworsk 2025 | Queen's Gambit Declined: Ragozin Defense | |
| May 23, 2025 | Stefansson | ½–½ | Ovsejevitsch | Chess Week in Przeworsk 2025 | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| May 22, 2025 | Sowinski | ½–½ | Stefansson | Chess Week in Przeworsk 2025 | Ruy Lopez: Closed, Martinez Variation | |
| May 22, 2025 | Lewtak | ½–½ | Stefansson | Chess Week in Przeworsk 2025 | Nimzo-Indian Defense: Classical Variation | |
| Apr 15, 2025 | Stefansson | 0–1 | Kadric | Reykjavik Open 2025 | Philidor Defense: Lion Variation | |
| Apr 14, 2025 | Frayna | 0–1 | Stefansson | Reykjavik Open 2025 | Sicilian Defense: Closed | |
| Apr 13, 2025 | Stefansson | 1–0 | Ornolfsson | Reykjavik Open 2025 | English Opening: Four Knights System, Nimzowitsch Variation | |
| Apr 12, 2025 | Amar | 1–0 | Stefansson | Reykjavik Open 2025 | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Apr 11, 2025 | Stefansson | 1–0 | Friedel | Reykjavik Open 2025 | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Apr 9, 2025 | Stefansson | 1–0 | Patel | Reykjavik Open 2025 | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Sep 22, 2024 | Ben Ammar | 0–1 | Stefansson | 45th FIDE Chess Olympiad | Pseudo Queen's Indian Defense | |
| Sep 21, 2024 | Aoshima | 0–1 | Stefansson | 45th FIDE Chess Olympiad | Queen's Gambit Declined: Barmen Variation | |
| Sep 20, 2024 | Cabralis | 0–1 | Stefansson | 45th FIDE Chess Olympiad | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Sep 19, 2024 | Hommadov | 0–1 | Stefansson | 45th FIDE Chess Olympiad | Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation | |
| Sep 18, 2024 | Nabaty | 1–0 | Stefansson | 45th FIDE Chess Olympiad | Indian Defense: Anti-Nimzo-Indian | |
| Sep 15, 2024 | Stefansson | ½–½ | Petrov | 45th FIDE Chess Olympiad | Sicilian Defense: Najdorf Variation, English Attack | |
| Sep 14, 2024 | Mulenga | 0–1 | Stefansson | 45th FIDE Chess Olympiad | Queen's Indian Accelerated | |
| Sep 12, 2024 | Erigaisi Arjun | 1–0 | Stefansson | 45th FIDE Chess Olympiad | Indian Defense: London System | |
| Sep 11, 2024 | Oscar Naranjo Gonzalez | 0–1 | Stefansson | 45th FIDE Chess Olympiad | Sicilian Defense: Grand Prix Attack | |