| Jun 7, 2026 | Birkisson | 1–0 | Jonsson | Skákþing Íslands - Áskorendaflokkur 2026 | Benko Gambit Accepted: King Walk Variation | |
| Jun 6, 2026 | Birkisson | ½–½ | Birkisson | Skákþing Íslands - Áskorendaflokkur 2026 | Queen's Gambit Declined: Ragozin Defense | |
| Jun 4, 2026 | Karlsson | 0–1 | Birkisson | Skákþing Íslands - Áskorendaflokkur 2026 | Semi-Slav Defense: Chigorin Defense | |
| Jun 3, 2026 | Birkisson | 1–0 | Bjarkason | Skákþing Íslands - Áskorendaflokkur 2026 | Lion Defense: Lion's Jaw | |
| Jun 2, 2026 | Birkisson | 1–0 | Hermannsson | Skákþing Íslands - Áskorendaflokkur 2026 | Zukertort Opening | |
| Jun 1, 2026 | Omarsson | 1–0 | Birkisson | Skákþing Íslands - Áskorendaflokkur 2026 | Nimzo-Indian Defense: Normal Variation | |
| May 31, 2026 | Helgadottir | 0–1 | Birkisson | Skákþing Íslands - Áskorendaflokkur 2026 | Queen's Gambit Declined: Austrian Defense | |
| May 30, 2026 | Birkisson | * | Davidsson | Skákþing Íslands - Áskorendaflokkur 2026 | Queen's Gambit Declined | |
| May 30, 2026 | Birkisson | ½–½ | Hallmundarson | Skákþing Íslands - Áskorendaflokkur 2026 | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| May 9, 2026 | Thorfinnsson | ½–½ | Birkisson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Italian Game: Scotch Gambit, Anderssen Attack | |
| May 8, 2026 | Birkisson | 0–1 | Heimisson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Bogo-Indian Defense: Grünfeld Variation | |
| May 7, 2026 | Ptacnikova | 0–1 | Birkisson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Sicilian Defense: Closed, Chameleon Variation | |
| May 6, 2026 | Birkisson | ½–½ | Birkisson | Landsliðsflokkur Íslandsmótsins í skák 2026 | French Defense: Tarrasch Variation, Modern System | |
| May 4, 2026 | Ragnarsson | 1–0 | Birkisson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Zukertort Opening | |
| May 4, 2026 | Birkisson | ½–½ | Johannsson | Landsliðsflokkur Íslandsmótsins í skák 2026 | English Opening: Anglo-Indian Defense, King's Knight 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 | Kjartansson | 1–0 | Birkisson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Nimzo-Indian Defense: Kmoch Variation | |
| May 1, 2026 | Birkisson | 0–1 | Stefansson | Landsliðsflokkur Íslandsmótsins í skák 2026 | Zukertort Opening | |
| Apr 26, 2026 | Birkisson | ½–½ | Hallmundarson | Boðsmót TR A-flokkur | Yusupov-Rubinstein System | |
| Apr 25, 2026 | Heidarsson | 0–1 | Birkisson | Boðsmót TR A-flokkur | Queen's Gambit Declined: Austrian Defense | |
| Apr 25, 2026 | Birkisson | ½–½ | Jonsson | Boðsmót TR A-flokkur | Queen's Gambit Accepted: Gunsberg Defense | |
| Apr 24, 2026 | Omarsson | ½–½ | Birkisson | Boðsmót TR A-flokkur | Nimzo-Indian Defense: Normal Variation | |
| Apr 24, 2026 | Heimisson | 1–0 | Birkisson | Boðsmót TR A-flokkur | Ruy Lopez: Closed, Martinez Variation | |
| Mar 29, 2026 | Birkisson | 0–1 | Gupta | Reykjavik Open 2026 | King's Indian Defense: Normal Variation | |
| Mar 27, 2026 | Agmanov | 1–0 | Birkisson | Reykjavik Open 2026 | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Mar 26, 2026 | Stefansson | ½–½ | Birkisson | Reykjavik Open 2026 | Ruy Lopez: Closed, Martinez Variation | |
| Mar 26, 2026 | Birkisson | ½–½ | Baskin | Reykjavik Open 2026 | King's Indian Defense: Makogonov Variation | |
| Mar 8, 2026 | Birkisson | ½–½ | Johannsson | Icelandic team chess championship premier league | Bogo-Indian Defense: Grünfeld Variation | |
| Mar 7, 2026 | Ahlander | 0–1 | Birkisson | Icelandic team chess championship premier league | Ruy Lopez: Closed, Anti-Marshall | |
| Mar 7, 2026 | Thorhallsson | ½–½ | Birkisson | Icelandic team chess championship premier league | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Mar 6, 2026 | Birkisson | 0–1 | Thorarinsson | Icelandic team chess championship premier league | Sicilian Defense: French Variation | |
| Mar 5, 2026 | Thorfinnsson | ½–½ | Birkisson | Icelandic team chess championship premier league | Ruy Lopez: Morphy Defense, Tarrasch Variation | |
| Dec 7, 2025 | Gretarsson | 0–1 | Birkisson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Queen's Gambit Accepted | |
| Dec 4, 2025 | Hardarson | 0–1 | Birkisson | Icelandic team chess championship premier league | Queen's Pawn Game: Krause Variation | |
| Nov 16, 2025 | Gislason | 1–0 | Birkisson | Icelandic team chess championship premier league | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Nov 15, 2025 | Birkisson | 1–0 | Prudnikov | Icelandic team chess championship premier league | Torre Attack: Fianchetto Defense | |
| Nov 15, 2025 | Omarsson | 0–1 | Birkisson | Icelandic team chess championship premier league | Nimzo-Indian Defense: Normal Variation | |
| Nov 14, 2025 | Sigurjonsson | 1–0 | Birkisson | Icelandic team chess championship premier league | Scotch Game: Classical Variation, Intermezzo Variation | |
| Oct 24, 2025 | Birkisson | 1–0 | Stamatiou | Round 6: Birkisson, Bjorn Holm - Stamatiou, Rodolfos | Yusupov-Rubinstein System | |
| Oct 21, 2025 | Kurochkin | 1–0 | Birkisson | Round 3: Kurochkin, Victor - Birkisson, Bjorn Holm | Italian Game: Giuoco Pianissimo, Normal | |
| Oct 20, 2025 | Birkisson | ½–½ | Chovan | Round 2: Birkisson, Bjorn Holm - Chovan, Milan | Grünfeld Defense: Exchange Variation, Modern Exchange Variation | |
| Sep 12, 2025 | Omarsson | 0–1 | Birkisson | Haustmot TR 2025 | Nimzo-Indian Defense: Rubinstein System | |
| Sep 10, 2025 | Birkisson | 1–0 | Thorsteinsson | Haustmot TR 2025 | Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations | |
| Sep 3, 2025 | Birkisson | 0–1 | Thorfinnsson | Haustmot TR 2025 | Indian Defense: Spielmann-Indian | |
| Sep 3, 2025 | Ptacnikova | * | Birkisson | Haustmot TR 2025 | Zukertort Opening | |
| Sep 3, 2025 | Birkisson | ½–½ | Johannesson | Haustmot TR 2025 | French Defense: Winawer Variation, Portisch-Hook Variation | |
| Sep 3, 2025 | Ragnarsson | 1–0 | Birkisson | Haustmot TR 2025 | Queen's Pawn Game: London System | |
| Sep 3, 2025 | Birkisson | ½–½ | Stefansson | Haustmot TR 2025 | English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit | |
| Sep 3, 2025 | Birkisson | ½–½ | Birkisson | Haustmot TR 2025 | English Opening: King's English Variation, Four Knights Variation, Quiet Line | |
| Sep 3, 2025 | Omarsson | ½–½ | Birkisson | Haustmot TR 2025 | Queen's Gambit Declined: Austrian Defense | |
| Jul 6, 2025 | Birkisson | 0–1 | Solodovnichenko | La Plagne 5th Edition July 2025 - Master tournament | Pirc Defense: Classical Variation, Quiet System | |
| Jun 21, 2025 | Omarsson | ½–½ | Birkisson | Icelandic Open 2025 | Nimzo-Indian Defense: Normal Variation | |
| Jun 20, 2025 | Birkisson | 1–0 | Arnason | Icelandic Open 2025 | King's Indian Defense: Makogonov Variation | |
| Jun 20, 2025 | Birkisson | ½–½ | Birkisson | Icelandic Open 2025 | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Jun 19, 2025 | Birkisson | 1–0 | Dietzsch | Icelandic Open 2025 | Sicilian Defense: Four Knights Variation | |
| Jun 19, 2025 | Bergsson | 0–1 | Birkisson | Icelandic Open 2025 | Sicilian Defense: Classical Variation, Anti-Sozin Variation | |
| Jun 18, 2025 | Bjornsson | 1–0 | Birkisson | Icelandic Open 2025 | Sicilian Defense: Kalashnikov Variation | |
| Jun 18, 2025 | Birkisson | 1–0 | Petursson | Icelandic Open 2025 | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Jun 17, 2025 | Kjartansson | 1–0 | Birkisson | Icelandic Open 2025 | English Opening: Agincourt Defense | |
| Jun 16, 2025 | Thorfinnsson | ½–½ | Birkisson | Icelandic Open 2025 | Sicilian Defense: Chekhover Variation | |
| Apr 9, 2025 | Lu | 1–0 | Birkisson | Reykjavik Open 2025 | French Defense: Advance Variation, Euwe Variation | |
| Nov 3, 2024 | Abdulla | ½–½ | Birkisson | Amsterdam Chess Open 2024 | King's Indian Attack | |
| Oct 25, 2024 | Webb | 1–0 | Birkisson | 39th European Chess Club Cup | Queen's Gambit Declined: Semi-Tarrasch Defense | |
| Oct 24, 2024 | Birkisson | 0–1 | Rosner | 39th European Chess Club Cup | Caro-Kann Defense: Endgame Offer | |
| Oct 23, 2024 | Birkisson | ½–½ | Voege | 39th European Chess Club Cup | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Oct 21, 2024 | Grigorian | ½–½ | Birkisson | 39th European Chess Club Cup | Bogo-Indian Defense: Retreat Variation | |
| Oct 20, 2024 | Birkisson | 1–0 | Burke | 39th European Chess Club Cup | French Defense: Tarrasch Variation, Closed Variation, Main Line | |
| Jun 9, 2024 | Heidarsson | 0–1 | Birkisson | Round 9: Heidarsson, Mikael Bjarki - Birkisson, Bjorn Holm | Queen's Gambit Declined | |
| Jun 8, 2024 | Birkisson | 1–0 | Thorisson | Round 8: Birkisson, Bjorn Holm - Thorisson, Benedikt | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Jun 7, 2024 | Ptacnikova | ½–½ | Birkisson | Round 7: Ptacnikova, Lenka - Birkisson, Bjorn Holm | English Opening: Neo-Catalan | |
| Jun 6, 2024 | Birkisson | ½–½ | Heidarsson | Round 6: Birkisson, Bjorn Holm - Heidarsson, Arnar Milutin | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Jun 5, 2024 | Birkisson | 1–0 | Birkisson | Round 5: Birkisson, Bardur Orn - Birkisson, Bjorn Holm | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Jun 4, 2024 | Birkisson | 1–0 | Skarphedinsson | Round 4: Birkisson, Bjorn Holm - Skarphedinsson, Ingvar Wu | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| Jun 3, 2024 | Jonsson | 0–1 | Birkisson | Round 3: Jonsson, Gauti Pall - Birkisson, Bjorn Holm | Caro-Kann Defense: Exchange Variation | |
| Jun 2, 2024 | Birkisson | 1–0 | Eliasson | Round 2: Birkisson, Bjorn Holm - Eliasson, Kristjan Orn | English Opening | |
| Jun 1, 2024 | Oskarsson | 0–1 | Birkisson | Round 1: Oskarsson, Markus Orri - Birkisson, Bjorn Holm | Benko Gambit Accepted: Fully Accepted Variation | |
| Mar 19, 2024 | Birkisson | 0–1 | Chasin | Reykjavik Open 2024 | English Opening: King's English Variation, Four Knights Variation, Quiet Line | |
| Mar 18, 2024 | Birkisson | ½–½ | Krzyzanowski | Reykjavik Open 2024 | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Mar 15, 2024 | Moussard | 1–0 | Birkisson | Reykjavik Open 2024 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Dec 7, 2024 | Birkisson | ½–½ | Liu | Round 9: Birkisson, Bjorn Holm - Liu,Tianyi (Jack) | English Opening: King's English Variation, Four Knights Variation, Quiet Line | |
| Dec 6, 2024 | Freeland | 0–1 | Birkisson | Round 8: Freeland, Alex - Birkisson, Bjorn Holm | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Dec 5, 2024 | Birkisson | ½–½ | Murawski | Round 7: Birkisson, Bjorn Holm - Murawski, Jan | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Dec 3, 2024 | Bird | ½–½ | Birkisson | Round 6: Bird, Joel - Birkisson, Bjorn Holm | Caro-Kann Defense: Tartakower Variation | |
| Dec 2, 2024 | Birkisson | ½–½ | Smith | Round 5: Birkisson, Bjorn Holm - Smith, Olivia | English Opening: King's English Variation, Reversed Sicilian | |
| Dec 1, 2024 | Dignam | ½–½ | Birkisson | Round 4: Dignam, Matthew - Birkisson, Bjorn Holm | Rapport-Jobava System | |
| Nov 30, 2024 | Birkisson | ½–½ | Sivanandan | Round 3: Birkisson, Bjorn Holm - Sivanandan, Bodhana | Petrov's Defense: Modern Attack, Center Variation | |
| Nov 30, 2024 | Zhang | 1–0 | Birkisson | Round 2: Zhang, Kendrick Botong - Birkisson, Bjorn Holm | Caro-Kann Defense: Advance Variation, Short Variation | |
| Nov 29, 2024 | Birkisson | 0–1 | Gonzalez Garcia | Round 1: Birkisson, Bjorn Holm - Gonzalez Garcia, Jose | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Oct 22, 2024 | Zanan | 1–0 | Birkisson | Round 3: Zanan, Evgeny - Birkisson, Bjorn Holm | Caro-Kann Defense: Tartakower Variation | |
| Jul 9, 2023 | Birkisson | 1–0 | Bartos | Ceske Budejovice Open A | Sicilian Defense: Moscow Variation | |
| Jul 8, 2023 | Vaculik | ½–½ | Birkisson | Ceske Budejovice Open A | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jul 7, 2023 | Birkisson | ½–½ | Hertlein | Ceske Budejovice Open A | Sicilian Defense: Moscow Variation | |
| Jul 6, 2023 | Sim | ½–½ | Birkisson | Ceske Budejovice Open A | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jul 5, 2023 | Birkisson | ½–½ | Lutz | Ceske Budejovice Open A | Sicilian Defense: Moscow Variation | |
| Jul 4, 2023 | Vilimek | ½–½ | Birkisson | Ceske Budejovice Open A | Sicilian Defense: Kalashnikov Variation | |
| Jul 3, 2023 | Birkisson | 1–0 | Slaby | Ceske Budejovice Open A | Nimzowitsch Defense: El Columpio Defense, Exchange Variation | |
| Jul 2, 2023 | Simacek | 0–1 | Birkisson | Ceske Budejovice Open A | Sicilian Defense: Wing Gambit | |
| Jul 1, 2023 | Birkisson | 0–1 | Novomeska | Ceske Budejovice Open A | Caro-Kann Defense: Advance Variation, Bayonet Attack | |
| Jun 16, 2023 | Birkisson | 0–1 | Jacobsen | Teplice 2023 | Sicilian Defense: French Variation | |
| Jun 13, 2023 | Souhardo | ½–½ | Birkisson | Teplice 2023 | Sicilian Defense: Kalashnikov Variation | |