8 games · 2020–2025 · 6 classical · 2 online
Gretarsson 22 draws4 Hjartarson
37.5% for Gretarsson
Openings between them
| B06 | Modern Defense | 2 | 50.0% |
| E12 | Queen's Indian Defense: Miles Variation | 2 | 50.0% |
| C55 | Italian Game: Two Knights Defense, Modern Bishop's Opening | 1 | 0.0% |
| D11 | Slav Defense: Modern Line | 1 | 0.0% |
| D24 | Queen's Gambit Accepted | 1 | 100.0% |
| E39 | Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation | 1 | 0.0% |
All games
| Hjartarson, J2473 | 1-0 | Gretarsson, He2418 | TCh-ISL Kvika 2025-26 | 2025 |
| Gretarsson, He2437 | ½-½ | Hjartarson, J2523 | ch-ISL 2021 | 2021 |
| Hjartarson, J2525 | 0-1 | Gretarsson, He2440 | Icelandic Cup 2021 | 2021 |
| Gretarsson, He2440 | ½-½ | Hjartarson, J2525 | Icelandic Cup 2021 | 2021 |
| Gretarsson, He2440 | 1-0 | Hjartarson, J2525 | Icelandic Cup 2021 | 2021 |
| Hjartarson, J2525 | 1-0 | Gretarsson, He2440 | Icelandic Cup 2021 | 2021 |
| Gretarsson, He2440 | 0-1 | Hjartarson, J2525 | ch-ISL Rapid 2020 | 2020 |
| Hjartarson, J2525 | 1-0 | Gretarsson, He2440 | ch-ISL Blitz 2020 | 2020 |