| 19 mar 2026 | Kazakouski, Valery 2575 | Johannsson, Birkir Isak 2260 | ½-½ | D35 Gambito de Dama rehusado: Exchange Variation, Carlsen Variation | Kópavogur International Chess Tournament 2026 | 90 | Ver |
| 18 mar 2026 | Johannsson, Birkir Isak 2260 | Ragnarsson, Dagur 2376 | ½-½ | D37 Gambito de Dama rehusado: Harrwitz Attack | Kópavogur International Chess Tournament 2026 | 31 | Ver |
| 15 mar 2026 | Heimisson, Hilmir Freyr 2300 | Johannsson, Birkir Isak 2260 | 0-1 | B52 Defensa Siciliana: Moscow Variation, Main Line | Kópavogur International Chess Tournament 2026 | 30 | Ver |
| 13 mar 2026 | Johannsson, Birkir Isak 2260 | Birkisson, Bardur Orn 2207 | 1-0 | D37 Gambito de Dama rehusado: Harrwitz Attack, Two Knights Defense | Kópavogur International Chess Tournament 2026 | 63 | Ver |
| 13 mar 2026 | Domalchuk-Jonasson, Aleksandr 2362 | Johannsson, Birkir Isak 2260 | 0-1 | D02 Apertura de Peón de Dama: Symmetrical Variation | Kópavogur International Chess Tournament 2026 | 58 | Ver |
| 12 mar 2026 | Johannsson, Birkir Isak 2260 | Pultinevicius, Paulius 2563 | 0-1 | D47 Defensa Semieslava: Meran Variation | Kópavogur International Chess Tournament 2026 | 52 | Ver |
| 11 mar 2026 | Stefansson, Vignir Vatnar 2511 | Johannsson, Birkir Isak 2260 | 1-0 | C47 Apertura de los Cuatro Caballos: Glek System | Kópavogur International Chess Tournament 2026 | 42 | Ver |
| 10 mar 2026 | Johannsson, Birkir Isak 2260 | Oleksiyenko, Mykhaylo 2569 | ½-½ | A48 East Indian Defense | Kópavogur International Chess Tournament 2026 | 40 | Ver |
| 10 mar 2026 | Johannsson, Birkir Isak 2260 | Santos Latasa, Jaime 2618 | 0-1 | D47 Defensa Semieslava: Meran Variation | Kópavogur International Chess Tournament 2026 | 38 | Ver |
| 8 mar 2026 | Thorfinnsson, Bjorn 2335 | Johannsson, Birkir Isak 2260 | 1-0 | D00 Apertura de Peón de Dama: Levitsky Attack | Icelandic team chess championship premier league | 27 | Ver |
| 7 mar 2026 | Johannsson, Birkir Isak 2260 | Danielsen, Henrik 2476 | 0-1 | A46 Defensa India: Wade-Tartakower Defense | Icelandic team chess championship premier league | 56 | Ver |
| 7 mar 2026 | Johannsson, Birkir Isak 2260 | Gretarsson, Helgi Ass 2414 | ½-½ | A41 Wade Defense | Icelandic team chess championship premier league | 34 | Ver |
| 6 mar 2026 | Thorhallsson, Simon 2236 | Johannsson, Birkir Isak 2260 | 0-1 | B15 Defensa Caro-Kann: Tartakower Variation | Icelandic team chess championship premier league | 51 | Ver |
| 5 mar 2026 | Johannsson, Birkir Isak 2260 | Ragnarsson, Dagur 2376 | ½-½ | D32 Defensa Tarrasch: Symmetrical Variation | Icelandic team chess championship premier league | 55 | Ver |
| 7 dic 2025 | Johannsson, Birkir Isak 2237 | Thorfinnsson, Bjorn 2416 | 0-1 | D37 Gambito de Dama rehusado: Three Knights Variation | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | 42 | Ver |
| 7 dic 2025 | Johannsson, Birkir Isak 2237 | Heimisson, Hilmir Freyr 2420 | 0-1 | D11 Defensa Eslava: Modern Line | Friðriksmót Landsbankans – Íslandsmótið í hraðskák | 61 | Ver |
| 4 dic 2025 | Johannsson, Birkir Isak 2221 | Johannesson, Oliver 2256 | 1-0 | A43 Defensa India: Pseudo-Benko | Icelandic team chess championship premier league | 37 | Ver |
| 16 nov 2025 | Johannsson, Birkir Isak 2221 | Johannsson, Orn Leo 2314 | 1-0 | A30 Apertura Inglesa: Symmetrical Variation, Hedgehog Defense | Icelandic team chess championship premier league | 49 | Ver |
| 15 nov 2025 | Arngrimsson, Dagur 2370 | Johannsson, Birkir Isak 2221 | ½-½ | D30 Gambito de Dama rehusado | Icelandic team chess championship premier league | 23 | Ver |
| 14 nov 2025 | Johannsson, Birkir Isak 2221 | Kjartansson, David 2262 | 1-0 | E11 Defensa Bogoindia: Wade-Smyslov Variation | Icelandic team chess championship premier league | 32 | Ver |