| Krassel, Timofei2035 | 1-0 | Kjartansson, Matthias Bjorgvin1893 | Reykjavik Open 2024 | 2024 |
| Kjartansson, Matthias Bjorgvin1893 | 0-1 | Unzicker, F2284 | Reykjavik Open 2024 | 2024 |
| Mueller, Magnus2144 | 0-1 | Kjartansson, Matthias Bjorgvin1893 | Reykjavik Open 2024 | 2024 |
| Kjartansson, Matthias Bjorgvin1893 | 0-1 | Eriksson, Jor2154 | Reykjavik Open 2024 | 2024 |
| Povah, N2202 | 0-1 | Kjartansson, Matthias Bjorgvin1893 | Reykjavik Open 2024 | 2024 |
| Andrieu, Justin1720 | 0-1 | Kjartansson, Matthias Bjorgvin1893 | Reykjavik Open 2024 | 2024 |
| Kjartansson, Matthias Bjorgvin1893 | ½-½ | Einarsson, Eirikur Gardar1690 | Reykjavik Open 2024 | 2024 |
| Kjartansson, Matthias Bjorgvin1651 | 0-1 | Asikainen, Eeli2081 | World Youth Open U14 2023 | 2023 |
| Lin, Leo2097 | ½-½ | Kjartansson, Matthias Bjorgvin1651 | World Youth Open U14 2023 | 2023 |
| Kjartansson, Matthias Bjorgvin1651 | 0-1 | Ermitsch, Magnus2206 | World Youth Open U14 2023 | 2023 |
| Nilsson, Oliver1955 | 1-0 | Kjartansson, Matthias Bjorgvin1689 | Reykjavik Open 2023 | 2023 |
| Kjartansson, Matthias Bjorgvin1689 | 0-1 | Southcott-Moyers, Indy2094 | Reykjavik Open 2023 | 2023 |
| Verweij, Kees2010 | ½-½ | Kjartansson, Matthias Bjorgvin1689 | Reykjavik Open 2023 | 2023 |
| Kjartansson, Matthias Bjorgvin1504 | 0-1 | Manukonda, A2014 | Kvika Reykjavik Open 2022 | 2022 |
| Magnusson, M2014 | 0-1 | Kjartansson, Matthias Bjorgvin1504 | Kvika Reykjavik Open 2022 | 2022 |