| Jun 21, 2025 | Ingvarsson | 0–1 | Gudmundsson | Icelandic Open 2025 | Indian Defense: Anti-Nimzo-Indian | |
| Jun 21, 2025 | Gudmundsson | 0–1 | Van Meter | Icelandic Open 2025 | Benoni Defense: Knight's Tour Variation | |
| Jun 19, 2025 | Gudmundsson | ½–½ | Petursson | Icelandic Open 2025 | Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense | |
| Jun 19, 2025 | Ptacnikova | 1–0 | Gudmundsson | Icelandic Open 2025 | English Opening: Anglo-Indian Defense, Queen's Indian Formation | |
| Jun 18, 2025 | Gudmundsson | ½–½ | Karason | Icelandic Open 2025 | Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense | |
| Jun 18, 2025 | Peycheva | 1–0 | Gudmundsson | Icelandic Open 2025 | English Opening: Mikenas-Carls Variation | |
| Jun 17, 2025 | Gudmundsson | 1–0 | Finnsson | Icelandic Open 2025 - 100 ára afmælism | Queen's Pawn Game: Colle System | |
| Jun 16, 2025 | Briem | ½–½ | Gudmundsson | Icelandic Open 2025 | Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line | |
| Mar 23, 2025 | Gudmundsson | 0–1 | Kien | Round 5: Gudmundsson, Gunnar Erik - Kien, Clovis | King's Indian Defense: Exchange Variation | |
| Mar 22, 2025 | Gudmundsson | 1–0 | O`reilly | Round 3: Gudmundsson, Gunnar Erik - O`reilly, Conor | Mexican Defense | |
| Mar 22, 2025 | Pitel | ½–½ | Gudmundsson | Round 4: Pitel, Benedikt - Gudmundsson, Gunnar Erik | French Defense: Advance Variation, Paulsen Attack | |
| Mar 21, 2025 | Gudmundsson | 0–1 | Dasgupta | Round 1: Gudmundsson, Gunnar Erik - Dasgupta, Avyukt | Bogo-Indian Defense: Nimzowitsch Variation | |
| Mar 21, 2025 | Blokhin | 1–0 | Gudmundsson | Round 2: Blokhin, Sofia - Gudmundsson, Gunnar Erik | Nimzo-Indian Defense: Sämisch Variation | |
| Jun 9, 2024 | Thorisson | 1–0 | Gudmundsson | Round 9: Thorisson, Benedikt - Gudmundsson, Gunnar Erik | French Defense: Exchange Variation | |
| Jun 4, 2024 | Gudmundsson | 0–1 | Eliasson | Round 4: Gudmundsson, Gunnar Erik - Eliasson, Kristjan Orn | King's Indian Defense: Orthodox Variation | |
| Jun 3, 2024 | Bjarkason | 0–1 | Gudmundsson | Round 3: Bjarkason, Brynjar - Gudmundsson, Gunnar Erik | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Mar 21, 2024 | Kazarian | ½–½ | Gudmundsson | Reykjavik Open 2024 | Trompowsky Attack | |
| Mar 19, 2024 | Risting | 1–0 | Gudmundsson | Reykjavik Open 2024 | Queen's Gambit Declined: Ragozin Defense | |
| Mar 31, 2023 | Gaal | * | Gudmundsson | Reykjavik Open | ? | |
| Apr 12, 2022 | Mai | 0–1 | Gudmundsson | ROpen 2022 | ? | |
| Apr 10, 2022 | Gudmundsson | 1–0 | Louis | ROpen 2022 | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Apr 10, 2022 | Domalchuk-Jonasson | 1–0 | Gudmundsson | ROpen 2022 | Nimzo-Indian Defense: Normal Variation, Ragozin Variation | |
| Apr 9, 2022 | Player | 1–0 | Gudmundsson | ROpen 2022 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Apr 7, 2022 | Gudmundsson | 1–0 | Wichtrup | Reykjavik Open 2022 | Queen's Gambit Declined: Exchange Variation | |
| Apr 6, 2022 | Gardarsson | 0–1 | Gudmundsson | Kvika Reykjavik Open 2022 | Indian Defense: Normal Variation | |
| Sep 2, 2021 | Hjaltason | ½–½ | Gudmundsson | European Individual Chess Championship 2021 - Reykjavik Open | French Defense: Rubinstein Variation, Blackburne Defense | |
| Sep 1, 2021 | Gudmundsson | 0–1 | Sylvan | European Individual Chess Championship 2021 - Reykjavik Open | Nimzo-Indian Defense: Classical Variation | |
| Aug 31, 2021 | Gudmundsson | 0–1 | Bergsson | European Individual Chess Championship 2021 - Reykjavik Open | Semi-Slav Defense: Normal Variation | |
| Aug 30, 2021 | Pappelis | ½–½ | Gudmundsson | European Individual Chess Championship 2021 - Reykjavik Open | Sicilian Defense: Old Sicilian | |
| Aug 29, 2021 | Birkisson | ½–½ | Gudmundsson | European Individual Chess Championship 2021 - Reykjavik Open | English Opening: Anglo-Indian Defense | |
| Aug 28, 2021 | Gudmundsson | 1–0 | Helgadottir | European Individual Chess Championship 2021 - Reykjavik Open | Queen's Indian Defense: Fianchetto Variation | |
| Aug 27, 2021 | Pein | 1–0 | Gudmundsson | European Individual Chess Championship 2021 - Reykjavik Open | Queen's Gambit Declined: Harrwitz Attack, Main Line | |
| Aug 26, 2021 | Gudmundsson | 0–1 | Stefansson | European Individual Chess Championship 2021 - Reykjavik Open | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Quiet Line | |
| — | Gudmundsson | 0–1 | Martin | ROpen 2022 | Nimzo-Indian Defense: Classical Variation | |
