| Jun 10, 2026 | Tocchioni | 0–1 | Thorhallsson | Round 9: Tocchioni, Doriano - Thorhallsson, Throstur | Queen's Gambit Declined: Three Knights, Vienna Variation | |
| Jun 9, 2026 | Thorhallsson | 1–0 | Paasikangas | Round 8: Thorhallsson, Throstur - Paasikangas, Johanna | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Jun 8, 2026 | Van den Bersselaar | 1–0 | Thorhallsson | Round 7: Van den Bersselaar, Jeroen - Thorhallsson, Throstur | Sicilian Defense: Old Sicilian | |
| Jun 7, 2026 | Thorhallsson | ½–½ | Thirion | Round 6: Thorhallsson, Throstur - Thirion, Marcel | Sicilian Defense: Velimirovic Attack | |
| Jun 6, 2026 | Berend | 1–0 | Thorhallsson | Round 5: Berend, Fred - Thorhallsson, Throstur | Sicilian Defense: Modern Variations | |
| Jun 5, 2026 | Thorhallsson | ½–½ | Sielecki | Round 4: Thorhallsson, Throstur - Sielecki, Christof | Caro-Kann Defense: Exchange Variation | |
| Jun 4, 2026 | Sylvan | 0–1 | Thorhallsson | Round 3: Sylvan, Jacob - Thorhallsson, Throstur | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Jun 3, 2026 | Thorhallsson | 1–0 | Adrian | Round 2: Thorhallsson, Throstur - Adrian, Claude | Sicilian Defense: Hyperaccelerated Dragon | |
| Jun 2, 2026 | Schmahl | 0–1 | Thorhallsson | Round 1: Schmahl, Stephan - Thorhallsson, Throstur | Sicilian Defense: Classical Variation, Anti-Sozin Variation | |
| Apr 28, 2026 | Thorhallsson | ½–½ | Kaidanov | Round 9: Thorhallsson, Throstur - Kaidanov, Gregory | Scotch Game: Schmidt Variation | |
| Apr 27, 2026 | Thorhallsson | ½–½ | Godena | Round 8: Thorhallsson, Throstur - Godena, Michele | Scotch Game: Potter Variation | |
| Apr 26, 2026 | Gronn | ½–½ | Thorhallsson | Round 7: Gronn, Atle - Thorhallsson, Throstur | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Apr 25, 2026 | Thorhallsson | 1–0 | Burnett | Round 6: Thorhallsson, Throstur - Burnett, Andrew | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Apr 22, 2026 | Thorhallsson | 1–0 | Webb | Round 4: Thorhallsson, Throstur - Webb, Laurence E | French Defense: Winawer Variation | |
| Apr 21, 2026 | Gormally | ½–½ | Thorhallsson | Round 3: Gormally, Daniel W - Thorhallsson, Throstur | Sicilian Defense: Delayed Alapin Variation | |
| Apr 20, 2026 | Thorhallsson | ½–½ | Beilfuss | Round 2: Thorhallsson, Throstur - Beilfuss, Wilfried, Dr. | Sicilian Defense: Kan Variation, Modern Variation | |
| Apr 19, 2026 | Thorhallsson | 1–0 | Kinnunen | Round 1: Thorhallsson, Throstur - Kinnunen, Kari | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Mar 7, 2026 | Thorhallsson | ½–½ | Thorfinnsson | Icelandic team chess championship premier league | Queen's Pawn Game: Symmetrical Variation | |
| Mar 7, 2026 | Thorhallsson | ½–½ | Birkisson | Icelandic team chess championship premier league | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Mar 6, 2026 | Ahlander | 0–1 | Thorhallsson | Icelandic team chess championship premier league | Semi-Slav Defense: Meran Variation, Wade Variation | |
| Mar 5, 2026 | Thorarinsson | 0–1 | Thorhallsson | Icelandic team chess championship premier league | Semi-Slav Defense | |
| Dec 7, 2025 | Thorfinnsson | 1–0 | Thorhallsson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Queen's Pawn Game: Symmetrical Variation | |
| Dec 7, 2025 | Birkisson | 0–1 | Thorhallsson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Sicilian Defense: Moscow Variation | |
| Dec 7, 2025 | Thorhallsson | ½–½ | Hjartarson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Dec 7, 2025 | Thorhallsson | 1–0 | Heimisson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | French Defense: Paulsen Variation | |
| Dec 7, 2025 | Gretarsson | 0–1 | Thorhallsson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | English Opening: Agincourt Defense, Wimpy System | |
| Dec 7, 2025 | Thorhallsson | 0–1 | Stefansson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Dec 6, 2025 | Stefansson | 1–0 | Thorhallsson | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | Catalan Opening: Closed | |
| Dec 4, 2025 | Jakubiec | ½–½ | Thorhallsson | Icelandic team chess championship premier league | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Nov 16, 2025 | Thorhallsson | 0–1 | Bogdanov | Icelandic team chess championship premier league | Sicilian Defense: Delayed Alapin Variation | |
| Nov 15, 2025 | Thorhallsson | 0–1 | Ostrovskiy | Icelandic team chess championship premier league | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Oct 24, 2025 | Stohl | ½–½ | Thorhallsson | Round 6: Stohl, Igor - Thorhallsson, Throstur | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Oct 23, 2025 | Thorhallsson | 1–0 | Klabis | Round 5: Thorhallsson, Throstur - Klabis, Rokas | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Oct 20, 2025 | Colbow | 1–0 | Thorhallsson | Round 2: Colbow, Collin - Thorhallsson, Throstur | Sicilian Defense: Kalashnikov Variation | |
| Oct 5, 2025 | Lacasa Diaz | ½–½ | Thorhallsson | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | Zukertort Opening | |
| Oct 4, 2025 | Thorhallsson | 1–0 | Sielecki | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Oct 3, 2025 | Van der Werf | ½–½ | Thorhallsson | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | Queen's Gambit Declined: Modern Variation | |
| Oct 1, 2025 | Grgurevic | 0–1 | Thorhallsson | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Sep 30, 2025 | Thorhallsson | ½–½ | Fercec | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | Sicilian Defense: Najdorf Variation | |
| Sep 29, 2025 | Leitner | 0–1 | Thorhallsson | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | Semi-Slav Defense: Stoltz Variation | |
| Sep 27, 2025 | Muedder | ½–½ | Thorhallsson | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | Sicilian Defense: Scheveningen Variation, Modern Variation | |
| Sep 24, 2025 | Thorhallsson | ½–½ | Degraeve | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Apr 15, 2025 | Llari | ½–½ | Thorhallsson | Reykjavik Open 2025 | Queen's Gambit Declined: Three Knights Variation | |
| Apr 14, 2025 | Thorhallsson | 1–0 | Arruebarrena Rodriguez | Reykjavik Open 2025 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Apr 13, 2025 | Petersen | ½–½ | Thorhallsson | Reykjavik Open 2025 | Sicilian Defense: French Variation | |
| Apr 11, 2025 | Banusz | 1–0 | Thorhallsson | Reykjavik Open 2025 | Queen's Pawn Game: London System | |
| Apr 10, 2025 | Joel Paul Ganta | ½–½ | Thorhallsson | Reykjavik Open 2025 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Feb 26, 2025 | Thorhallsson | ½–½ | Lipka | WSTCC | French Defense: Tarrasch Variation, Open System | |
| Feb 21, 2025 | Thorhallsson | ½–½ | Czebe | WSTCC | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Feb 19, 2025 | Guo | 0–1 | Thorhallsson | WSTCC | Sicilian Defense: O'Kelly Variation, Yerevan System | |
| Feb 18, 2025 | Dishman | 0–1 | Thorhallsson | WSTCC | Catalan Opening: Open Defense, Classical Line | |
| Feb 17, 2025 | Fink-Nunn | ½–½ | Thorhallsson | WSTCC | Sicilian Defense: Classical Variation, Anti-Sozin Variation | |
| Jul 11, 2024 | Koganov | ½–½ | Thorhallsson | 50-1 | Sicilian Defense: Moscow Variation, Sokolsky Variation | |
| Jul 10, 2024 | Thorhallsson | 1–0 | Kantorik | 50-1 | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Jul 9, 2024 | Novikov | ½–½ | Thorhallsson | 50-1 | Queen's Gambit Declined: Three Knights Variation | |
| Jul 7, 2024 | Thorhallsson | 1–0 | Findlay | 50-1 | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Jul 5, 2024 | Thorhallsson | 1–0 | Arkell | 50-1 | Caro-Kann Defense: Exchange Variation | |
| Jul 4, 2024 | Thorhallsson | 1–0 | Koop | 50-1 | Sicilian Defense: Najdorf Variation, Zagreb Variation | |
| Jul 4, 2024 | Linik | ½–½ | Thorhallsson | 50-1 | Sicilian Defense: Delayed Alapin Variation | |
| Jul 2, 2024 | Kozma | 0–1 | Thorhallsson | 50-1 | Sicilian Defense: Boleslavsky Variation | |
| May 15, 2024 | Nordenbaek | ½–½ | Thorhallsson | European Senior Team Chess Championship 2024 - Section 50 + | Sicilian Defense: Godiva Variation | |
| May 14, 2024 | Mueller | ½–½ | Thorhallsson | European Senior Team Chess Championship 2024 - Section 50 + | Sicilian Defense: Modern Variations | |
| May 13, 2024 | Davies | ½–½ | Thorhallsson | European Senior Team Chess Championship 2024 - Section 50 + | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| May 12, 2024 | Thorhallsson | ½–½ | Zetocha | European Senior Team Chess Championship 2024 - Section 50 + | Sicilian Defense: Delayed Alapin Variation | |
| May 11, 2024 | Ortega | ½–½ | Thorhallsson | European Senior Team Chess Championship 2024 - Section 50 + | Indian Defense: Anti-Nimzo-Indian | |
| May 10, 2024 | Thorhallsson | 1–0 | Horvath | European Senior Team Chess Championship 2024 - Section 50 + | Sicilian Defense: Kalashnikov Variation | |
| May 9, 2024 | Thorhallsson | 1–0 | Miljanic | European Senior Team Chess Championship 2024 - Section 50 + | French Defense: Tarrasch Variation, Chistyakov Defense | |
| May 7, 2024 | Thorhallsson | 1–0 | Jackson | European Senior Team Chess Championship 2024 - Section 50 + | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Mar 21, 2024 | Karamsetty | 0–1 | Thorhallsson | Reykjavik Open 2024 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Mar 20, 2024 | Wehding | 0–1 | Thorhallsson | Reykjavik Open 2024 | Indian Defense | |
| Mar 18, 2024 | Maze | 1–0 | Thorhallsson | Reykjavik Open 2024 | Sicilian Defense: Moscow Variation | |
| Mar 16, 2024 | Thorhallsson | ½–½ | Wadsworth | Reykjavik Open 2024 | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Mar 16, 2024 | Shivika Rohilla | 0–1 | Thorhallsson | Reykjavik Open 2024 | Réti Opening: Réti Accepted | |
| Apr 3, 2023 | Banusz | 1–0 | Thorhallsson | Reykjavik Open 2023 | King's Indian Attack | |
| Apr 2, 2023 | Thorhallsson | 1–0 | Bergsson | Reykjavik Open 2023 | Sicilian Defense: Old Sicilian | |
| Apr 1, 2023 | Briem | 0–1 | Thorhallsson | Reykjavik Open 2023 | Queen's Gambit Accepted: Furman Variation | |
| Mar 31, 2023 | Thorhallsson | ½–½ | Leonard | Reykjavik Open | Semi-Slav Defense: Stoltz Variation | |
| Mar 30, 2023 | Thorhallsson | ½–½ | Erdos | Reykjavik Open 2023 | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Mar 18, 2023 | Thorhallsson | 0–1 | Pantzar | Icelandic Team Championship | Caro-Kann Defense: Exchange Variation | |
| Mar 17, 2023 | Jakubiec | 1–0 | Thorhallsson | Icelandic Team Championship | Sicilian Defense: Closed, Traditional | |
| Oct 16, 2022 | Thorhallsson | ½–½ | Hansen | Icelandic Team Championship | Sicilian Defense: Godiva Variation | |
| Oct 15, 2022 | Thorhallsson | ½–½ | Movsziszian | Icelandic Team Championship | Modern Defense: Standard Defense | |
| Oct 15, 2022 | Thorhallsson | 1–0 | Bjornsson | Icelandic Team Championship | Sicilian Defense: Dragon Variation, Classical Variation | |
| Oct 4, 2022 | Volokitin | 1–0 | Thorhallsson | ECCC_22 | Sicilian Defense: Classical Variation | |
| May 1, 2022 | Thorhallsson | ½–½ | Thorhallsson | Icelandic Chess Championship 2022 | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Apr 30, 2022 | Stefansson | 1–0 | Thorhallsson | Icelandic Chess Championship 2022 | Sicilian Defense: Scheveningen Variation, Keres Attack | |
| Apr 27, 2022 | Thorhallsson | 1–0 | Thorfinnsson | Icelandic Chess Championship 2022 | Scotch Game: Malaniuk Variation | |
| Apr 26, 2022 | Kjartansson | ½–½ | Thorhallsson | Icelandic Chess Championship 2022 | Catalan Opening: Closed | |
| Apr 25, 2022 | Heimisson | 0–1 | Thorhallsson | Icelandic Chess Championship 2022 | Indian Defense: Anti-Nimzo-Indian | |
| Apr 24, 2022 | Thorhallsson | 0–1 | Stefansson | Icelandic Chess Championship 2022 | Sicilian Defense: Open | |
| Apr 23, 2022 | Steingrimsson | ½–½ | Thorhallsson | Icelandic Chess Championship 2022 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Apr 22, 2022 | Thorhallsson | ½–½ | Mai | Icelandic Chess Championship 2022 | Italian Game: Classical Variation, Giuoco Pianissimo, Main Line | |
| Apr 21, 2022 | Gretarsson | ½–½ | Thorhallsson | Icelandic Chess Championship 2022 | Sicilian Defense: Richter-Rauzer Variation | |
| Apr 12, 2022 | Niemann | 1–0 | Thorhallsson | ROpen 2022 | Rapport-Jobava System | |
| Apr 11, 2022 | Thorhallsson | 1–0 | Mai | ROpen 2022 | Sicilian Defense: Najdorf Variation | |
| Apr 10, 2022 | Thorhallsson | 1–0 | Cramling Bellon | ROpen 2022 | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Apr 10, 2022 | Valkama | ½–½ | Thorhallsson | ROpen 2022 | Sicilian Defense: Kramnik Variation | |
| Apr 7, 2022 | Domalchuk-Jonasson | ½–½ | Thorhallsson | Reykjavik Open 2022 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| — | Thorhallsson | 1–0 | Khoury | Reykjavik Open 2022 | Indian Defense: Anti-Nimzo-Indian | |
| — | Thorhallsson | 1–0 | Haugen | ROpen 2022 | Sicilian Defense: Hyperaccelerated Dragon | |