| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. H Jonasson vs F Beltz |
| 0-1 | 37 | 2014 | Reykjavik Open | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 2. L Baldvinsson vs H Jonasson |
| ½-½ | 50 | 2014 | Reykjavik Open | C53 Giuoco Piano |
| 3. H Jonasson vs A Saraiva |
| 0-1 | 46 | 2014 | Reykjavik Open | B18 Caro-Kann, Classical |
| 4. A O Johansen vs H Jonasson |
| 1-0 | 31 | 2014 | Reykjavik Open | D35 Queen's Gambit Declined |
| 5. H Jonasson vs H Hauksdottir |
  | 0-1 | 18 | 2014 | Reykjavik Open | C70 Ruy Lopez |
| 6. T Magnusson vs H Jonasson |
| 0-1 | 30 | 2014 | Reykjavik Open | A36 English |
| 7. H Jonasson vs O Maggason |
| 1-0 | 54 | 2014 | Reykjavik Open | C65 Ruy Lopez, Berlin Defense |
| 8. P Kilthau vs H Jonasson |
| 1-0 | 48 | 2014 | Reykjavik Open | C53 Giuoco Piano |
| 9. O Johannesson vs H Jonasson |
| 1-0 | 26 | 2015 | Reykjavik Open | D35 Queen's Gambit Declined |
| 10. H Jonasson vs O Jonsson |
| 0-1 | 24 | 2015 | Reykjavik Open | B83 Sicilian |
| 11. H Jonasson vs D Kenney |
| 1-0 | 33 | 2015 | Reykjavik Open | D00 Queen's Pawn Game |
| 12. H Jonasson vs J Hald |
| 0-1 | 31 | 2015 | Reykjavik Open | B27 Sicilian |
| 13. B Petersson vs H Jonasson |
| 1-0 | 37 | 2015 | Reykjavik Open | C01 French, Exchange |
| 14. H Jonasson vs A Barthel |
| 0-1 | 19 | 2017 | Reykjavik Open | B03 Alekhine's Defense |
| 15. N Davidsdottir vs H Jonasson |
| 1-0 | 33 | 2017 | Reykjavik Open | B13 Caro-Kann, Exchange |
| 16. H Johannesson vs H Jonasson |
| ½-½ | 32 | 2017 | Reykjavik Open | A49 King's Indian, Fianchetto without c4 |
| 17. F Puglia vs H Jonasson |
| 1-0 | 45 | 2018 | Reykjavik Open | B18 Caro-Kann, Classical |
| 18. H Jonasson vs Pall Thorsson |
| 0-1 | 49 | 2018 | Reykjavik Open | B06 Robatsch |
| 19. Pietro Mancini vs H Jonasson |
| ½-½ | 41 | 2018 | Reykjavik Open | D02 Queen's Pawn Game |
| 20. H Jonasson vs B Thorisson |
| 0-1 | 66 | 2018 | Reykjavik Open | B40 Sicilian |
| 21. T Moller vs H Jonasson |
| ½-½ | 46 | 2018 | Reykjavik Open | C02 French, Advance |
| 22. H Jonasson vs B Steinthorsson |
| 1-0 | 39 | 2018 | Reykjavik Open | C62 Ruy Lopez, Old Steinitz Defense |
| 23. H Jonasson vs J Hentze |
| ½-½ | 33 | 2019 | Reykjavik Open | C87 Ruy Lopez |
| 24. Jay A Carr vs H Jonasson |
| 1-0 | 28 | 2019 | Reykjavik Open | A36 English |
| 25. H Jonasson vs Haris Mujacic |
| 1-0 | 38 | 2019 | Reykjavik Open | B01 Scandinavian |
Kibitzing
