| Jun 7, 2026 | Omarsson | 0–1 | Hermannsson | Skákþing Íslands - Áskorendaflokkur 2026 | Indian Defense: Normal Variation | |
| Jun 6, 2026 | Omarsson | ½–½ | Omarsson | Skákþing Íslands - Áskorendaflokkur 2026 | Zukertort Opening: Reversed Grünfeld | |
| Jun 5, 2026 | Omarsson | 0–1 | Jonsson | Skákþing Íslands - Áskorendaflokkur 2026 | Benko Gambit Accepted: Fully Accepted Variation | |
| Jun 3, 2026 | Omarsson | 1–0 | Thorsteinsson | Skákþing Íslands - Áskorendaflokkur 2026 | Grünfeld Defense: Exchange Variation, Modern Exchange Variation | |
| Jun 2, 2026 | Skarphedinsson | ½–½ | Omarsson | Skákþing Íslands - Áskorendaflokkur 2026 | King's Indian Defense: Exchange Variation | |
| Jun 1, 2026 | Omarsson | 1–0 | Bergsson | Skákþing Íslands - Áskorendaflokkur 2026 | Nimzo-Indian Defense: Normal Variation | |
| May 31, 2026 | Karlsson | ½–½ | Omarsson | Skákþing Íslands - Áskorendaflokkur 2026 | English Opening: Anglo-Indian Defense | |
| May 30, 2026 | Davidsson | ½–½ | Omarsson | Skákþing Íslands - Áskorendaflokkur 2026 | Modern Defense: Standard Defense | |
| Feb 15, 2026 | Omarsson | 0–1 | Iskos | Nordisk Mesterskab gruppe A | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Feb 14, 2026 | Omarsson | 0–1 | Religa | Nordisk Mesterskab gruppe A | English Defense | |
| Feb 14, 2026 | Petersen | ½–½ | Omarsson | Nordisk Mesterskab gruppe A | King's Indian Defense: Makogonov Variation | |
| Feb 13, 2026 | Omarsson | 0–1 | Wedenberg | Nordisk Mesterskab gruppe A | Queen's Gambit Declined: Westphalian Variation | |
| Feb 13, 2026 | Olsen | 1–0 | Omarsson | Nordisk Mesterskab gruppe A | Sicilian Defense: Modern Variations | |
| Feb 12, 2026 | Omarsson | ½–½ | Wahlgreen | Nordisk Mesterskab gruppe A | King's Indian Defense: Orthodox Variation | |
| Dec 4, 2025 | Kjartansson | ½–½ | Omarsson | Icelandic team chess championship premier league | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Nov 16, 2025 | Thorfinnsson | 1–0 | Omarsson | Icelandic team chess championship premier league | Sicilian Defense: Closed | |
| Nov 15, 2025 | Omarsson | ½–½ | Johannsson | Icelandic team chess championship premier league | Nimzo-Indian Defense: Normal Variation | |
| Nov 15, 2025 | Omarsson | 0–1 | Birkisson | Icelandic team chess championship premier league | Nimzo-Indian Defense: Normal Variation | |
| Nov 14, 2025 | Arngrimsson | 1–0 | Omarsson | Icelandic team chess championship premier league | Sicilian Defense: Alapin Variation | |
| Oct 24, 2025 | Jablonicky | ½–½ | Omarsson | Round 6: Jablonicky, Martin - Omarsson, Adam | King's Indian Defense: Orthodox Variation, Classical System, Neo-Classical Line | |
| Oct 23, 2025 | Omarsson | ½–½ | Sakalauskas | Round 5: Omarsson, Adam - Sakalauskas, Vaidas | Queen's Gambit Accepted: Rosenthal Variation | |
| Oct 20, 2025 | Reuker | 1–0 | Omarsson | Round 2: Reuker, Jari - Omarsson, Adam | Benoni Defense: Hromádka System | |
| Sep 12, 2025 | Stefansson | 1–0 | Omarsson | Haustmot TR 2025 | Sicilian Defense: Najdorf Variation | |
| Sep 10, 2025 | Omarsson | ½–½ | Omarsson | Haustmot TR 2025 | English Opening: Symmetrical Variation | |
| Sep 3, 2025 | Omarsson | 0–1 | Birkisson | Haustmot TR 2025 | Queen's Gambit Accepted: Janowski-Larsen Variation | |
| Sep 3, 2025 | Thorfinnsson | 1–0 | Omarsson | Haustmot TR 2025 | Sicilian Defense: Closed | |
| Sep 3, 2025 | Omarsson | ½–½ | Ptacnikova | Haustmot TR 2025 | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Sep 3, 2025 | Johannesson | ½–½ | Omarsson | Haustmot TR 2025 | Sicilian Defense: Moscow Variation | |
| Sep 3, 2025 | Omarsson | 0–1 | Ragnarsson | Haustmot TR 2025 | Slav Defense: Chebanenko Variation | |
| Sep 3, 2025 | Thorsteinsson | ½–½ | Omarsson | Haustmot TR 2025 | King's Indian Defense: Kramer Variation | |
| Sep 3, 2025 | Omarsson | ½–½ | Birkisson | Haustmot TR 2025 | Queen's Gambit Declined: Austrian Defense | |
| Jun 21, 2025 | Omarsson | 0–1 | Stefansson | Icelandic Open 2025 | English Defense | |
| Jun 20, 2025 | Asgrimsson | 0–1 | Omarsson | Icelandic Open 2025 | King's Indian Defense: Zinnowitz Variation | |
| Jun 20, 2025 | Thorhallsson | 0–1 | Omarsson | Icelandic Open 2025 | Nimzo-Larsen Attack: Indian Variation | |
| Jun 19, 2025 | Omarsson | 0–1 | Schitco | Icelandic Open 2025 | Rat Defense: English Rat | |
| Jun 19, 2025 | Omarsson | 0–1 | Thorfinnsson | Icelandic Open 2025 | Nimzo-Indian Defense: St. Petersburg Variation | |
| Jun 18, 2025 | Thorfinnsson | 0–1 | Omarsson | Icelandic Open 2025 | Sicilian Defense: Wing Gambit, Carlsbad Variation | |
| Jun 18, 2025 | Omarsson | 1–0 | Bjornsson | Icelandic Open 2025 | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Jun 17, 2025 | Ingvarsson | 0–1 | Omarsson | Icelandic Open 2025 | King's Indian Defense: Exchange Variation | |
| Jun 16, 2025 | Omarsson | 0–1 | Domalchuk-Jonasson | Icelandic Open 2025 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Apr 15, 2025 | Omarsson | 0–1 | Haug | Reykjavik Open 2025 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Apr 10, 2025 | Willems | 1–0 | Omarsson | Reykjavik Open 2025 | King's Indian Defense: Fianchetto Variation, Classical Fianchetto | |
| Mar 23, 2025 | Brion Lacherest | 1–0 | Omarsson | Round 5: Brion Lacherest, Nathan - Omarsson, Adam | Modern Defense: Standard Defense | |
| Mar 22, 2025 | Omarsson | ½–½ | Quaite | Round 4: Omarsson, Adam - Quaite, Toby | Benko Gambit: Zaitsev System | |
| Mar 22, 2025 | Woods | 0–1 | Omarsson | Round 3: Woods, Christopher - Omarsson, Adam | Pirc Defense: Classical Variation, Quiet System, Chigorin Line | |
| Mar 21, 2025 | Omarsson | 0–1 | Gorkov | Round 2: Omarsson, Adam - Gorkov, Kirill | Benoni Defense: Taimanov Variation | |
| Mar 21, 2025 | Pereslavtsev | ½–½ | Omarsson | Round 1: Pereslavtsev, Alexandr - Omarsson, Adam | King's Indian Defense: Semi-Averbakh System | |
| Aug 22, 2024 | Omarsson | 0–1 | Dehtiarov | EYCC 2024 - O18 | Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation | |
| Aug 5, 2024 | Omarsson | 0–1 | Pahud | Letni Praha 2024 | Nimzo-Indian Defense | |
| Aug 4, 2024 | Omarsson | 0–1 | Golenia | Letni Praha 2024 | Nimzo-Indian Defense: Normal Variation, Schlechter Defense | |
| Aug 4, 2024 | Neukirchner | ½–½ | Omarsson | Letni Praha 2024 | King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System | |
| Aug 3, 2024 | Omarsson | 1–0 | Jun | Letni Praha 2024 | King's Indian Defense: Orthodox Variation, Bayonet Attack | |
| Jun 20, 2024 | Kantane | 1–0 | Omarsson | Round 7: Kantane, Anna - Omarsson, Adam | Modern Defense: Standard Defense | |
| Jun 5, 2024 | Osorio Ferrer | 1–0 | Omarsson | Round 5: Osorio Ferrer, Roberto Eduardo - Omarsson, Adam | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Jun 3, 2024 | Birkisson | 1–0 | Omarsson | Round 3: Birkisson, Bardur Orn - Omarsson, Adam | Sicilian Defense: Moscow Variation | |
| Oct 30, 2024 | Nilsson | ½–½ | Omarsson | Round 8: Nilsson, Oliver - Omarsson, Adam | Pirc Defense: Classical Variation | |
| Oct 30, 2024 | Seiger | ½–½ | Omarsson | Round 9: Seiger, Vidar - Omarsson, Adam | King's Indian Attack: Symmetrical Defense | |
| Oct 29, 2024 | Omarsson | ½–½ | Kingsley | Round 7: Omarsson, Adam - Kingsley, Elias | Nimzo-Indian Defense: Kmoch Variation | |
| Oct 28, 2024 | Omarsson | 0–1 | Falkevall | Round 5: Omarsson, Adam - Falkevall, Axel | King's Indian Defense: Four Pawns Attack, Normal Attack | |
| Oct 28, 2024 | Ostensson | 0–1 | Omarsson | Round 6: Ostensson, Julia - Omarsson, Adam | Pirc Defense: Austrian Attack, Dragon Formation | |
| Oct 27, 2024 | Thorisson | ½–½ | Omarsson | Round 4: Thorisson, Benedikt - Omarsson, Adam | Sicilian Defense: Najdorf Variation | |
| Oct 26, 2024 | Omarsson | 1–0 | Tripathi | Round 3: Omarsson, Adam - Tripathi, Pratyush | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Oct 26, 2024 | Preman | 0–1 | Omarsson | Round 2: Preman, Nathan - Omarsson, Adam | Sicilian Defense: Najdorf Variation | |
| Oct 25, 2024 | Omarsson | 0–1 | Soderstrom | Round 1: Omarsson, Adam - Soderstrom, Adrian | Tarrasch Defense: Schara Gambit | |
| Jun 25, 2024 | Gbyl | 1–0 | Omarsson | Krakow B | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Jun 24, 2024 | Omarsson | 1–0 | Klimaszewski | Krakow B | King's Indian Defense: Orthodox Variation, Bayonet Attack | |
| Nov 20, 2023 | Omarsson | 0–1 | Fava | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Queen's Gambit Declined | |
| Nov 15, 2023 | Omarsson | 0–1 | Moldagali | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Queen's Gambit Declined: Janowski Variation | |
| Nov 13, 2023 | Omarsson | 0–1 | Krawczyk | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Nimzo-Indian Defense: Normal Variation, Gligoric System | |
| Mar 31, 2023 | Omarsson | * | Terhuven | Reykjavik Open | ? | |
| Jan 1, 2023 | Aditya Mittal | * | Omarsson | Blixt-SM - open Swedish blitz championship | ? | |
| Apr 7, 2022 | Thorsteinsson | ½–½ | Omarsson | Kvika Reykjavik Open 2022 | Pirc Defense: Austrian Attack, Kurajica Variation | |
| Apr 6, 2022 | Omarsson | 1–0 | Lessmeister | Kvika Reykjavik Open 2022 | Nimzo-Indian Defense: Normal Variation | |
| Feb 26, 2022 | Omarsson | 0–1 | Strand | Krageroe Resort Chess 2022 ELO Group | Benoni Defense: Classical Variation, New York Variation | |
| Feb 26, 2022 | Helland | 0–1 | Omarsson | Krageroe Resort Chess 2022 ELO Group | Indian Defense: Przepiorka Variation | |
| Feb 25, 2022 | Omarsson | 0–1 | Jonsson | Krageroe Resort Chess 2022 ELO Group | Queen's Gambit Declined: Harrwitz Attack, Orthodox Defense | |
| Feb 25, 2022 | Dahli | 0–1 | Omarsson | Krageroe Resort Chess 2022 ELO Group | King's Indian Defense: Orthodox Variation, Positional Defense | |
| Feb 24, 2022 | Omarsson | 0–1 | Engeset | Krageroe Resort Chess 2022 ELO Group | Nimzo-Indian Defense: Kmoch Variation | |
| Feb 24, 2022 | Stromhaug | 0–1 | Omarsson | Krageroe Resort Chess 2022 ELO Group | Modern Defense: Standard Defense | |
| Feb 23, 2022 | Omtvedt | 0–1 | Omarsson | Krageroe Resort Chess 2022 ELO Group | King's Indian Defense: Orthodox Variation | |
| Sep 2, 2021 | Jonsson | ½–½ | Omarsson | European Individual Chess Championship 2021 - Reykjavik Open | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Sep 1, 2021 | Omarsson | 0–1 | Johannsdottir | European Individual Chess Championship 2021 - Reykjavik Open | Nimzo-Indian Defense: Kmoch Variation | |
| Aug 31, 2021 | Omarsson | 1–0 | Hallmundarson | European Individual Chess Championship 2021 - Reykjavik Open | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Aug 30, 2021 | Johannsson | 0–1 | Omarsson | European Individual Chess Championship 2021 - Reykjavik Open | Modern Defense | |
| Aug 29, 2021 | Omarsson | 0–1 | Hreinsson | European Individual Chess Championship 2021 - Reykjavik Open | Nimzo-Indian Defense: Kmoch Variation | |
| Aug 28, 2021 | Nielsen | 1–0 | Omarsson | European Individual Chess Championship 2021 - Reykjavik Open | King's Indian Defense: Semi-Averbakh System | |
| Aug 27, 2021 | Omarsson | 0–1 | Gueci | European Individual Chess Championship 2021 - Reykjavik Open | Nimzo-Indian Defense: Sämisch Variation, Keres Variation | |
| Aug 26, 2021 | Quparadze | 1–0 | Omarsson | European Individual Chess Championship 2021 - Reykjavik Open | Pirc Defense: Austrian Attack, Weiss Variation | |
| — | Omarsson | 1–0 | Jalving | Skanderborg GM 2025 | Nimzo-Indian Defense: Sämisch Variation, Keres Variation | |
| — | Omarsson | 0–1 | Nielsen | Skanderborg GM 2025 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |