| Mar 8, 2026 | Johannesson | ½–½ | Johannesson | Icelandic team chess championship premier league | Catalan Opening: Closed | |
| Dec 4, 2025 | Thorhallsson | 1–0 | Johannesson | Icelandic team chess championship premier league | Catalan Opening: Closed | |
| Nov 16, 2025 | Laurusas | 0–1 | Johannesson | Icelandic team chess championship premier league | Queen's Gambit Declined: Exchange Variation, Sämisch Variation | |
| Nov 15, 2025 | Johannesson | ½–½ | Williams | Icelandic team chess championship premier league | Queen's Pawn Game: Accelerated London System | |
| Nov 15, 2025 | Johannesson | ½–½ | Briem | Icelandic team chess championship premier league | Queen's Pawn Game: Accelerated London System | |
| Nov 14, 2025 | Stefansson | 1–0 | Johannesson | Icelandic team chess championship premier league | French Defense: Winawer Variation, Eingorn Variation | |
| Oct 24, 2025 | Johannesson | 0–1 | Bochnicka | Round 6: Johannesson, Ingvar Thor - Bochnicka, Vladimir | Italian Game: Two Knights Defense, Polerio Defense, Kieseritzky Variation | |
| Oct 23, 2025 | Vedrickas | 0–1 | Johannesson | Round 5: Vedrickas, Tautvydas - Johannesson, Ingvar Thor | Trompowsky Attack: Classical Defense, Big Center Variation | |
| Oct 20, 2025 | Johannesson | 0–1 | Grigorian | Round 2: Johannesson, Ingvar Thor - Grigorian, Spartak | Sicilian Defense: French Variation, Westerinen Attack | |
| Jul 17, 2024 | Johannesson | 1–0 | Zalega | Najdorf Memorial | King's Indian Defense: Orthodox Variation | |
| Jul 16, 2024 | Johannesson | 0–1 | Rozycki | Najdorf Memorial | Four Knights Game: Scotch Variation, Belgrade Gambit | |
| Jul 15, 2024 | Ashwath | 0–1 | Johannesson | Najdorf Memorial | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Jul 14, 2024 | Johannesson | 1–0 | Szymkiewicz | Najdorf Memorial | English Opening: King's English Variation | |
| Jul 13, 2024 | Rzewucki | ½–½ | Johannesson | Najdorf Memorial | French Defense: Winawer Variation, Alekhine-Maróczy Gambit | |
| Jul 12, 2024 | Terkiewicz | 1–0 | Johannesson | Najdorf Memorial | Catalan Opening: Open Defense, Classical Line | |
| Jul 11, 2024 | Johannesson | ½–½ | Rekuc | Najdorf Memorial | Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation | |
| Jul 10, 2024 | Nesterenko | ½–½ | Johannesson | Najdorf Memorial | French Defense: Exchange Variation | |
| Jul 9, 2024 | Johannesson | 1–0 | Swara Lakshmi S Nair | Najdorf Memorial | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| Jul 8, 2024 | Johannesson | ½–½ | Lecki | Macieja Memorial | English Opening: King's English Variation | |
| Jul 8, 2024 | Johannesson | 1–0 | Zalega | Macieja Memorial | King's Indian Defense: Orthodox Variation | |
| Jul 8, 2024 | Johannesson | 1–0 | Szustakowski | Macieja Memorial | English Opening: Agincourt Defense | |
| Jul 8, 2024 | Johannesson | 0–1 | Kacprzak | Macieja Memorial | Catalan Opening: Closed | |
| Jul 8, 2024 | Johannesson | 0–1 | Janeczko | Macieja Memorial | Benko Gambit Accepted: Dlugy Variation | |
| Jul 8, 2024 | Komisarski | 0–1 | Johannesson | Macieja Memorial | Trompowsky Attack: Classical Defense, Big Center Variation | |
| Jul 8, 2024 | Zaninotto | 0–1 | Johannesson | Macieja Memorial | Indian Defense: Knights Variation | |
| Jul 8, 2024 | Kazakouski | 0–1 | Johannesson | Macieja Memorial | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Jul 8, 2024 | Klimkowski | 1–0 | Johannesson | Macieja Memorial | French Defense: Tarrasch Variation, Closed Variation | |
| Jul 8, 2024 | Nesterenko | 0–1 | Johannesson | Macieja Memorial | Indian Defense: Anti-Nimzo-Indian | |
| Jul 8, 2024 | Grochulski | 0–1 | Johannesson | Macieja Memorial | French Defense: Horwitz Attack, Papa-Ticulat Gambit | |
| Mar 19, 2023 | Einarsson | 0–1 | Johannesson | Icelandic Team Championship | English Opening: Agincourt Defense, Wimpy System | |
| Mar 18, 2023 | Johannesson | 1–0 | Bjornsson | Icelandic Team Championship | King's Indian Defense: Orthodox Variation | |
| Mar 18, 2023 | Arngrimsson | 0–1 | Johannesson | Icelandic Team Championship | Benoni Defense: Czech Benoni Defense | |
| Oct 16, 2022 | Viglundsson | ½–½ | Johannesson | Icelandic Team Championship | Benoni Defense | |
| Oct 15, 2022 | Arngrimsson | ½–½ | Johannesson | Icelandic Team Championship | Indian Defense: Anti-Nimzo-Indian | |
| Oct 15, 2022 | Johannesson | ½–½ | Johannesson | Icelandic Team Championship | Nimzo-Indian Defense: Reshevsky Variation | |
| Oct 4, 2022 | Johannesson | 0–1 | Markus | ECCC_22 | King's Indian Defense: Orthodox Variation | |
| Sep 24, 2021 | Johannesson | ½–½ | Mohr | 36th European Club Cup | King's Indian Defense: Orthodox Variation, Classical System | |
| Sep 23, 2021 | Postny | 1–0 | Johannesson | 36th European Club Cup | Queen's Gambit Declined | |
| Sep 22, 2021 | Jogstad | 1–0 | Johannesson | 36th European Club Cup | ? | |
| Sep 21, 2021 | Johannesson | ½–½ | Podlesnik | 36th European Club Cup | Indian Defense: London System | |
| Sep 20, 2021 | Loescher | * | Johannesson | 36th European Club Cup | ? | |
| Sep 19, 2021 | Miftari | * | Johannesson | 36th European Club Cup | ? | |
| Sep 18, 2021 | Johannesson | 0–1 | Anton Guijarro | 36th European Club Cup | English Opening: King's English Variation, Taimanov Variation | |
| — | Johannesson | 0–1 | Bjornsson | Icelandic Team Championship | King's Indian Defense: Orthodox Variation, Classical System | |
| — | Johannesson | 1–0 | Petersson | Icelandic Team Championship | King's Indian Defense: Orthodox Variation | |
| — | Viglundsson | ½–½ | Johannesson | Icelandic Team Championship | Queen's Pawn Game: London System | |
| — | O`Donnell | 0–1 | Johannesson | Icelandic Team Championship | Queen's Gambit Declined: Westphalian Variation | |
