| Jun 20, 2026 | Stefansson | 1–0 | Ulfarsson | Green Diamond Invitational 2026 | Bogo-Indian Defense: Nimzowitsch Variation | |
| Jun 20, 2026 | Johannsson | 0–1 | Stefansson | Green Diamond Invitational 2026 | Queen's Pawn Game: Krause Variation | |
| Jun 20, 2026 | Stefansson | 1–0 | Thorfinnsson | Green Diamond Invitational 2026 | Queen's Gambit Declined: Three Knights Variation | |
| Jun 20, 2026 | Stefansson | 0–1 | Stefansson | Green Diamond Invitational 2026 | Sicilian Defense: Nimzowitsch Variation, Closed Variation | |
| Jun 20, 2026 | Stefansson | 1–0 | Gretarsson | Green Diamond Invitational 2026 | Modern Defense: Two Knights Variation | |
| Jun 20, 2026 | Thorfinnsson | 0–1 | Stefansson | Green Diamond Invitational 2026 | Horwitz Defense | |
| Jun 19, 2026 | Hjartarson | 0–1 | Stefansson | Green Diamond - Final Four | Sicilian Defense: Nimzowitsch Variation, Advance Variation | |
| Jun 19, 2026 | Stefansson | 1–0 | Hjartarson | Green Diamond - Final Four | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation | |
| Jun 19, 2026 | Stefansson | 1–0 | Johannsson | Green Diamond - Final Four | English Defense | |
| Jun 19, 2026 | Johannsson | 0–1 | Stefansson | Green Diamond - Final Four | Queen's Pawn Game: Krause Variation | |
| Jun 19, 2026 | Stefansson | ½–½ | Johannsson | Green Diamond - Final Four | Bogo-Indian Defense: Nimzowitsch Variation | |
| Jun 19, 2026 | Stefansson | 1–0 | Heimisson | Green Diamond Invitational 2026 | English Opening: Neo-Catalan | |
| Jun 19, 2026 | Olafsson | ½–½ | Stefansson | Green Diamond Invitational 2026 | Queen's Gambit Declined: Barmen Variation | |
| Jun 19, 2026 | Stefansson | 1–0 | Hjartarson | Green Diamond Invitational 2026 | Bogo-Indian Defense: Vitolins Variation | |
| May 9, 2026 | Kjartansson | 0–1 | Stefansson | Landsliðsflokkur Íslandsmótsins í skák 2026 | English Opening: Symmetrical Variation, Full Symmetry Line | |
| May 8, 2026 | Stefansson | ½–½ | Stefansson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Queen's Gambit Declined: Barmen Variation | |
| May 7, 2026 | Thorfinnsson | 0–1 | Stefansson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Queen's Pawn Game: Torre Attack, Gossip Variation | |
| May 6, 2026 | Stefansson | 1–0 | Heimisson | Landsliðsflokkur Íslandsmótsins í skák 2026 | English Opening: Mikenas-Carls Variation | |
| May 5, 2026 | Ptacnikova | 0–1 | Stefansson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Queen's Indian Defense: Kasparov-Petrosian Variation, Marco Defense | |
| May 4, 2026 | Stefansson | 1–0 | Birkisson | Landsliðsflokkur Íslandsmótsins í skák 2026 | English Opening: Symmetrical Variation, Four Knights Variation | |
| May 3, 2026 | Birkisson | ½–½ | Stefansson | Landsliðsflokkur Íslandsmótsins í skák 2026 | English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto | |
| May 2, 2026 | Stefansson | ½–½ | Ragnarsson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Queen's Gambit Declined: Three Knights Variation | |
| Apr 29, 2026 | Stefansson | 1–0 | Johannsson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Queen's Gambit Declined: Three Knights Variation | |
| Apr 19, 2026 | Stefansson | 1–0 | Rodshtein | EICC 2026 | Semi-Slav Defense | |
| Apr 18, 2026 | Santos Latasa | ½–½ | Stefansson | EICC 2026 | Queen's Gambit Declined: Charousek Variation | |
| Apr 16, 2026 | Stefansson | 1–0 | Injac | EICC 2026 | Queen's Gambit Declined: Three Knights Variation | |
| Apr 15, 2026 | Lagarde | 1–0 | Stefansson | EICC 2026 | Ruy Lopez: Open Berlin Defense, Showalter Variation | |
| Apr 13, 2026 | Lodici | 0–1 | Stefansson | EICC 2026 | Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Kaufmann Variation | |
| Apr 12, 2026 | Stefansson | 1–0 | Indjic | EICC 2026 | Bogo-Indian Defense: Nimzowitsch Variation | |
| Apr 10, 2026 | Stefansson | 1–0 | Kejna | EICC 2026 | Bogo-Indian Defense: Nimzowitsch Variation | |
| Apr 9, 2026 | Brzezina | ½–½ | Stefansson | EICC 2026 | Sicilian Defense: Godiva Variation | |
| Apr 8, 2026 | Stefansson | 1–0 | Plichta | EICC 2026 | Queen's Gambit Declined: Three Knights Variation | |
| Apr 7, 2026 | Pehar | 0–1 | Stefansson | EICC 2026 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Apr 5, 2026 | Stefansson | 0–1 | Anton Guijarro | EICC 2026 | Semi-Slav Defense | |
| Mar 31, 2026 | Stefansson | 1–0 | Balabayeva | Reykjavik Open 2026 | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Mar 30, 2026 | Ruiz Buendia | 0–1 | Stefansson | Reykjavik Open 2026 | Sicilian Defense: Nimzowitsch Variation, Advance Variation | |
| Mar 29, 2026 | Stefansson | 0–1 | Kjartansson | Reykjavik Open 2026 | Nimzo-Indian Defense: Sämisch Variation | |
| Mar 28, 2026 | Sklokin-Bagiyan | ½–½ | Stefansson | Reykjavik Open 2026 | Sicilian Defense: Nimzowitsch Variation, Closed Variation | |
| Mar 28, 2026 | Stefansson | ½–½ | Maurizzi | Reykjavik Open 2026 | Queen's Gambit Declined: Three Knights Variation | |
| Mar 27, 2026 | Oskarsson | 0–1 | Stefansson | Reykjavik Open 2026 | Dutch Defense: Classical Variation | |
| Mar 26, 2026 | Stefansson | ½–½ | Manish Anto Cristiano F | Reykjavik Open 2026 | Semi-Slav Defense | |
| Mar 26, 2026 | Moor | 0–1 | Stefansson | Reykjavik Open 2026 | Rat Defense: English Rat | |
| Mar 25, 2026 | Stefansson | 1–0 | Jakubek | Reykjavik Open 2026 | Réti Opening: Anglo-Slav Variation, Gurevich System | |
| Mar 19, 2026 | Stefansson | 1–0 | Birkisson | Kópavogur International Chess Tournament 2026 | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Mar 18, 2026 | Domalchuk-Jonasson | ½–½ | Stefansson | Kópavogur International Chess Tournament 2026 | Nimzo-Indian Defense: Classical Variation | |
| Mar 17, 2026 | Stefansson | 1–0 | Pultinevicius | Kópavogur International Chess Tournament 2026 | Semi-Slav Defense | |
| Mar 13, 2026 | Santos Latasa | ½–½ | Stefansson | Kópavogur International Chess Tournament 2026 | Sicilian Defense: Modern Variations | |
| Mar 13, 2026 | Stefansson | ½–½ | Kazakouski | Kópavogur International Chess Tournament 2026 | Caro-Kann Defense: Exchange Variation | |
| Mar 12, 2026 | Ragnarsson | 0–1 | Stefansson | Kópavogur International Chess Tournament 2026 | Nimzo-Indian Defense: Sämisch Variation | |
| Mar 11, 2026 | Stefansson | 1–0 | Johannsson | Kópavogur International Chess Tournament 2026 | Four Knights Game: Glek System | |
| Mar 10, 2026 | Heimisson | 1–0 | Stefansson | Kópavogur International Chess Tournament 2026 | Sicilian Defense: Moscow Variation, Main Line | |
| Mar 10, 2026 | Oleksiyenko | ½–½ | Stefansson | Kópavogur International Chess Tournament 2026 | Sicilian Defense: Nimzowitsch Variation, Closed Variation | |
| Mar 8, 2026 | Santos Latasa | 1–0 | Stefansson | Icelandic team chess championship premier league | Sicilian Defense: Nimzowitsch Variation, Closed Variation | |
| Mar 7, 2026 | Stefansson | ½–½ | Oleksiyenko | Icelandic team chess championship premier league | Catalan Opening: Closed | |
| Mar 6, 2026 | Wadsworth | 1–0 | Stefansson | Icelandic team chess championship premier league | Queen's Indian Accelerated | |
| Mar 5, 2026 | Stefansson | ½–½ | Kazakouski | Icelandic team chess championship premier league | Queen's Pawn Game: Zukertort Variation | |
| Jan 24, 2026 | Thorfinnsson | * | Stefansson | Le Kock Mótaröðin - Úrslitakvöld | Horwitz Defense | |
| Jan 24, 2026 | Thorfinnsson | * | Stefansson | Le Kock Mótaröðin - Úrslitakvöld | Horwitz Defense | |
| Jan 24, 2026 | Stefansson | 1–0 | Johannsson | Le Kock Mótaröðin - Úrslitakvöld | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Jan 24, 2026 | Stefansson | * | Thorfinnsson | Le Kock Mótaröðin - Úrslitakvöld | Sicilian Defense: Najdorf Variation | |
| Jan 24, 2026 | Bergsson | * | Stefansson | Le Kock Mótaröðin - Úrslitakvöld | King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line | |
| Jan 24, 2026 | Stefansson | * | Gretarsson | Le Kock Mótaröðin - Úrslitakvöld | Rat Defense: Accelerated Gurgenidze | |
| Jan 24, 2026 | Bjornsson | 0–1 | Stefansson | Le Kock Mótaröðin - Úrslitakvöld | Sicilian Defense: Richter-Rauzer Variation, Dragon Variation | |
| Jan 24, 2026 | Stefansson | * | Heimisson | Le Kock Mótaröðin - Úrslitakvöld | French Defense: Exchange Variation | |
| Jan 24, 2026 | Ragnarsson | 0–1 | Stefansson | Le Kock Mótaröðin - Úrslitakvöld | Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense | |
| Jan 24, 2026 | Stefansson | 1–0 | Skarphedinsson | Le Kock Mótaröðin - Úrslitakvöld | King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line | |
| Jan 24, 2026 | Jonsson | 0–1 | Stefansson | Le Kock Mótaröðin - Úrslitakvöld | Sicilian Defense: Modern Variations | |
| Jan 24, 2026 | Lagerman | * | Stefansson | Le Kock Mótaröðin - Úrslitakvöld | ? | |
| Dec 30, 2025 | Rodrigue-Lemieux | ½–½ | Stefansson | World Blitz 2025 Open | Sicilian Defense: Moscow Variation | |
| Dec 30, 2025 | Stefansson | 0–1 | Hong | World Blitz 2025 Open | Catalan Opening: Closed | |
| Dec 30, 2025 | Droin | 0–1 | Stefansson | World Blitz 2025 Open | Sicilian Defense: Classical Variation, Fianchetto Variation | |
| Dec 30, 2025 | Stefansson | ½–½ | Ansat | World Blitz 2025 Open | Queen's Pawn Game: Symmetrical Variation | |
| Dec 30, 2025 | Daneshvar | 1–0 | Stefansson | World Blitz 2025 Open | Sicilian Defense: Alapin Variation | |
| Dec 30, 2025 | Stefansson | 0–1 | Samunenkov | World Blitz 2025 Open | Catalan Opening: Closed | |
| Dec 29, 2025 | Mamedyarov | ½–½ | Stefansson | World Blitz 2025 Open | Queen's Gambit Declined | |
| Dec 29, 2025 | Stefansson | ½–½ | Le | World Blitz 2025 Open | Queen's Gambit Declined | |
| Dec 29, 2025 | Ahmad | 0–1 | Stefansson | World Blitz 2025 Open | Sicilian Defense: Chekhover Variation | |
| Dec 29, 2025 | Stefansson | ½–½ | Maksimovic | World Blitz 2025 Open | Indian Defense: Wade-Tartakower Defense | |
| Dec 29, 2025 | Gaehwiler | 0–1 | Stefansson | World Blitz 2025 Open | Queen's Pawn Game: London System, with e6 | |
| Dec 29, 2025 | Stefansson | ½–½ | Tsaruk | World Blitz 2025 Open | Queen's Indian Defense: Classical Variation, Traditional Variation | |
| Dec 29, 2025 | Oro | ½–½ | Stefansson | World Blitz 2025 Open | Sicilian Defense: Richter-Rauzer Variation, Dragon Variation | |
| Dec 29, 2025 | Stefansson | 1–0 | Zverev | World Blitz 2025 Open | Queen's Pawn Game: Symmetrical Variation | |
| Dec 29, 2025 | Erdogmus | ½–½ | Stefansson | World Blitz 2025 Open | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Dec 29, 2025 | Stefansson | 1–0 | Agmanov | World Blitz 2025 Open | Queen's Pawn Game: Symmetrical Variation | |
| Dec 29, 2025 | Muntean | 0–1 | Stefansson | World Blitz 2025 Open | Sicilian Defense: Heidenfeld Variation | |
| Dec 29, 2025 | Stefansson | 0–1 | Stribuk | World Blitz 2025 Open | Slav Defense: Exchange Variation, Symmetrical Line | |
| Dec 28, 2025 | Sklokin | 1–0 | Stefansson | World Blitz 2025 Open | Sicilian Defense: Richter-Rauzer Variation, Dragon Variation | |
| Dec 28, 2025 | Chekh Adm Khedr | 1–0 | Stefansson | WRBC 2025 Rapid Open | Philidor Defense: Lion Variation | |
| Dec 28, 2025 | Stefansson | 1–0 | Bodemar | WRBC 2025 Rapid Open | Queen's Pawn Game: Symmetrical Variation | |
| Dec 28, 2025 | Ohanyan | 1–0 | Stefansson | WRBC 2025 Rapid Open | Queen's Gambit Declined: Harrwitz Attack | |
| Dec 28, 2025 | Stefansson | 0–1 | Tran | WRBC 2025 Rapid Open | East Indian Defense | |
| Dec 27, 2025 | Sapenov | 1–0 | Stefansson | WRBC 2025 Rapid Open | French Defense: Tarrasch Variation, Morozevich Variation | |
| Dec 27, 2025 | Stefansson | 0–1 | Jumabayev | WRBC 2025 Rapid Open | King's Indian Defense: Normal Variation, Standard Development | |
| Dec 27, 2025 | Kuandykuly | 0–1 | Stefansson | WRBC 2025 Rapid Open | French Defense: Tarrasch Variation | |
| Dec 27, 2025 | Stefansson | ½–½ | Fandi | WRBC 2025 Rapid Open | Slav Defense: Exchange Variation, Symmetrical Line | |
| Dec 26, 2025 | Mamedov | ½–½ | Stefansson | WRBC 2025 Rapid Open | Queen's Gambit Declined: Three Knights Variation | |
| Dec 26, 2025 | Stefansson | ½–½ | Harikrishnan.A.Ra | WRBC 2025 Rapid Open | Slav Defense: Exchange Variation | |
| Dec 26, 2025 | Dominguez Perez | 1–0 | Stefansson | WRBC 2025 Rapid Open | French Defense: Paulsen Variation | |
| Dec 26, 2025 | Stefansson | 1–0 | Abdilkhair | WRBC 2025 Rapid Open | East Indian Defense | |
| Dec 26, 2025 | Santos Latasa | 1–0 | Stefansson | WRBC 2025 Rapid Open | French Defense: Paulsen Variation | |