| Apr 28, 2026 | Arnason | ½–½ | Mestel | Round 9: Arnason, Jon L - Mestel, A Jonathan | Sicilian Defense: Moscow Variation | |
| Apr 27, 2026 | Gorbatov | ½–½ | Arnason | Round 8: Gorbatov, Alexej - Arnason, Jon L | Bishop's Opening: Berlin Defense | |
| Apr 26, 2026 | Arnason | 1–0 | Gazik | Round 7: Arnason, Jon L - Gazik, Igor | Philidor Defense: Lion Variation | |
| Apr 25, 2026 | Roos | ½–½ | Arnason | Round 6: Roos, Louis - Arnason, Jon L | King's Indian Attack | |
| Apr 22, 2026 | Arnason | 1–0 | Prakken | Round 4: Arnason, Jon L - Prakken, Gerrit | Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation | |
| Apr 21, 2026 | Arnason | ½–½ | Sibilio | Round 3: Arnason, Jon L - Sibilio, Mario | Modern Defense: Standard Defense | |
| Apr 20, 2026 | McMichael | 0–1 | Arnason | Round 2: McMichael, Richard J - Arnason, Jon L | Nimzo-Larsen Attack: Indian Variation | |
| Apr 19, 2026 | Kowalczuk | ½–½ | Arnason | Round 1: Kowalczuk, Wojciech - Arnason, Jon L | Four Knights Game: Scotch Variation Accepted | |
| Mar 7, 2026 | Arnason | 1–0 | Gislason | Icelandic team chess championship premier league | Sicilian Defense: Kan Variation, Modern Variation | |
| Feb 25, 2025 | Arnason | 0–1 | D'Amore | WSTCC | Ruy Lopez: Classical Variation | |
| Feb 24, 2025 | Arnason | 1–0 | Kindt | WSTCC | Ruy Lopez: Open, Classical Defense | |
| Feb 23, 2025 | Hebden | 1–0 | Arnason | WSTCC | Queen's Pawn Game: London System | |
| Feb 21, 2025 | Arnason | 1–0 | Krizsany | WSTCC | Sicilian Defense: Gaw-Paw Variation | |
| Feb 20, 2025 | Min | 0–1 | Arnason | WSTCC | Réti Opening: Réti Accepted | |
| Feb 18, 2025 | Frostick | 0–1 | Arnason | WSTCC | Four Knights Game: Scotch Variation Accepted | |
| Feb 17, 2025 | Arnason | 1–0 | Frostick | WSTCC | Caro-Kann Defense: Classical Variation, Main Line | |
| Jul 10, 2024 | Briestensky | 1–0 | Arnason | 50-1 | English Opening: Symmetrical Variation, Anti-Benoni Variation | |
| Jul 9, 2024 | Arnason | 0–1 | Khachiyan | 50-1 | Caro-Kann Defense: Classical Variation, Lobron System | |
| Jul 6, 2024 | Ortega | 1–0 | Arnason | 50-1 | Queen's Gambit Accepted: Normal Variation | |
| Jul 5, 2024 | Flear | ½–½ | Arnason | 50-1 | Queen's Gambit Accepted: Old Variation | |
| Jul 4, 2024 | Staeblein | 0–1 | Arnason | 50-1 | Queen's Gambit Accepted: Normal Variation | |
| Jul 2, 2024 | Arnason | 1–0 | Csom | 50-1 | Scandinavian Defense: Portuguese Gambit, Classical Variation | |
