| Magnusson, Thorsteinn1485 | 0-1 | Pozimski, Szymon1972 | Reykjavik Open 2023 | 2023 |
| Carey, Michael1852 | 1-0 | Magnusson, Thorsteinn1485 | Reykjavik Open 2023 | 2023 |
| Magnusson, Thorsteinn1485 | ½-½ | Van Staden, Mildo1856 | Reykjavik Open 2023 | 2023 |
| Magnusson, Thorsteinn1629 | 0-1 | Teitsson, M2124 | TCh-ISL Div 1 2019-20 | 2021 |
| Kristjansson, A2176 | 1-0 | Magnusson, Thorsteinn1629 | TCh-ISL Div 1 2019-20 | 2021 |
| Magnusson, Thorsteinn1643 | 0-1 | Mai, Alexander Oliver2153 | ch-ISL Rapid 2020 | 2020 |
| Bjorgvinsson, Andri Freyr2097 | 1-0 | Magnusson, Thorsteinn1643 | ch-ISL Rapid 2020 | 2020 |
| Thorgeirsson, Jon Kristinn2255 | 1-0 | Magnusson, Thorsteinn1643 | ch-ISL Rapid 2020 | 2020 |
| Magnusson, Thorsteinn1643 | 1-0 | Karason, A2274 | ch-ISL Rapid 2020 | 2020 |
| Magnusson, Thorsteinn1435 | 0-1 | Meier, Ger1804 | Reykjavik Open 2018 | 2018 |
| Magnusson, Thorsteinn1435 | 0-1 | Mirza, Diana1849 | Reykjavik Open 2018 | 2018 |
| Davidsson, Oskar Vikingur1854 | 1-0 | Magnusson, Thorsteinn1425 | Reykjavik Congress 2018 | 2018 |
| Ragnarsson, Dagur2332 | 1-0 | Magnusson, Thorsteinn1425 | Reykjavik Congress 2018 | 2018 |
| Magnusson, Thorsteinn1425 | 0-1 | Birkisson, Bjorn Holm2084 | Reykjavik Congress 2018 | 2018 |
| Magnusson, Thorsteinn1489 | 0-1 | Eiriksson, S1928 | Reykjavik Open 2017 | 2017 |