| 10 jun 2026 | Vehi Bach, Victor Manuel 2179 | Petursson, Margeir 2393 | ½-½ | B12 Defensa Caro-Kann: Advance Variation | European Senior Chess Championship 2026 | 65+ | 30 | Ver |
| 8 jun 2026 | Petursson, Margeir 2393 | Kolesar, Milan 2077 | 1-0 | A11 Apertura Réti: Anglo-Slav Variation, with g3 | European Senior Chess Championship 2026 | 65+ | 28 | Ver |
| 7 jun 2026 | Astengo, Corrado 2003 | Petursson, Margeir 2393 | 0-1 | D38 Gambito de Dama rehusado: Ragozin Defense, Alekhine Variation | European Senior Chess Championship 2026 | 65+ | 65 | Ver |
| 6 jun 2026 | Petursson, Margeir 2393 | Pomes Marcet, Joan 2178 | 0-1 | D11 Defensa Eslava: Modern Line | European Senior Chess Championship 2026 | 65+ | 60 | Ver |
| 4 jun 2026 | Petursson, Margeir 2393 | Varley, Peter 2161 | ½-½ | A20 Apertura Inglesa: King's English Variation | European Senior Chess Championship 2026 | 65+ | 31 | Ver |
| 3 jun 2026 | Jaderberg, Bjorn 2074 | Petursson, Margeir 2393 | 0-1 | A30 Apertura Inglesa: Symmetrical Variation | European Senior Chess Championship 2026 | 65+ | 36 | Ver |
| 1 jun 2026 | Petursson, Margeir 2393 | Sturua, Zurab 2484 | ½-½ | A14 Apertura Inglesa: Agincourt Defense, Neo-Catalan Declined | European Senior Chess Championship 2026 | 65+ | 20 | Ver |
| 28 abr 2026 | Kosten, Anthony C. 2374 | Petursson, Margeir 2387 | ½-½ | A36 Apertura Inglesa: Symmetrical Variation, Ultra-Symmetrical Variation | FIDE World Senior Team Championships 2026 - Senior 65+ | 42 | Ver |
| 27 abr 2026 | Petursson, Margeir 2387 | Raetsky, Alexander 2282 | 1-0 | D25 Gambito de Dama aceptado: Janowski-Larsen Variation | FIDE World Senior Team Championships 2026 - Senior 65+ | 56 | Ver |
| 26 abr 2026 | Motuz, Karol 2233 | Petursson, Margeir 2387 | ½-½ | E55 Defensa Nimzoindia: Normal Variation, Gligoric System, Bronstein Variation | FIDE World Senior Team Championships 2026 - Senior 65+ | 17 | Ver |
| 25 abr 2026 | Petursson, Margeir 2387 | Haik, Aldo 2370 | 1-0 | A40 Kangaroo Defense | FIDE World Senior Team Championships 2026 - Senior 65+ | 49 | Ver |
| 23 abr 2026 | Moen, Ole Christian 2143 | Petursson, Margeir 2387 | 0-1 | B22 Defensa Siciliana: Alapin Variation, Barmen Defense | FIDE World Senior Team Championships 2026 - Senior 65+ | 50 | Ver |
| 21 abr 2026 | Ortega, Lexy 2323 | Petursson, Margeir 2387 | 1-0 | D38 Gambito de Dama rehusado: Ragozin Defense, Alekhine Variation | FIDE World Senior Team Championships 2026 - Senior 65+ | 38 | Ver |
| 20 abr 2026 | Petursson, Margeir 2387 | Townsend, M Paul 2153 | 1-0 | E05 Apertura Catalana: Open Defense, Classical Line | FIDE World Senior Team Championships 2026 - Senior 65+ | 67 | Ver |
| 19 abr 2026 | Petursson, Margeir 2387 | Rogowski, Jaroslaw 2077 | 1-0 | D11 Defensa Eslava: Modern Line | FIDE World Senior Team Championships 2026 - Senior 65+ | 40 | Ver |
| 8 mar 2026 | Petursson, Margeir 2382 | Thorfinnsson, Bragi 2377 | 0-1 | E06 Apertura Catalana: Closed | Icelandic team chess championship premier league | 34 | Ver |
| 7 mar 2026 | Briem, Stephan 2147 | Petursson, Margeir 2382 | 0-1 | E46 Defensa Nimzoindia: Reshevsky Variation | Icelandic team chess championship premier league | 34 | Ver |
| 6 mar 2026 | Petursson, Margeir 2382 | Arngrimsson, Dagur 2358 | 1-0 | B10 Defensa Caro-Kann: Accelerated Panov Attack, Modern Variation | Icelandic team chess championship premier league | 31 | Ver |
| 5 mar 2026 | Petursson, Margeir 2382 | Kjartansson, David 2249 | 1-0 | A34 Apertura Inglesa: Symmetrical Variation, Rubinstein Variation | Icelandic team chess championship premier league | 46 | Ver |
| 3 oct 2025 | Petursson, Margeir 2405 | Welling, Gerard 2206 | 0-1 | E95 Defensa India de Rey: Orthodox Variation | European individual senior chess championship 2025 - Open 65+, Rabac, Croatia | 66 | Ver |