| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. M Marentini vs H Sigurvaldason |
| 1-0 | 84 | 2014 | Reykjavik Open | A20 English |
| 2. T Longo vs H Sigurvaldason |
| 1-0 | 36 | 2014 | Reykjavik Open | D12 Queen's Gambit Declined Slav |
| 3. H Sigurvaldason vs O T Unnsteinsson |
| 1-0 | 32 | 2014 | Reykjavik Open | D06 Queen's Gambit Declined |
| 4. E Forsa vs H Sigurvaldason |
| 1-0 | 59 | 2014 | Reykjavik Open | B20 Sicilian |
| 5. H Sigurvaldason vs D Edvardsson |
| ½-½ | 31 | 2014 | Reykjavik Open | A57 Benko Gambit |
| 6. E de Winter vs H Sigurvaldason |
| ½-½ | 35 | 2014 | Reykjavik Open | D37 Queen's Gambit Declined |
| 7. H Sigurvaldason vs A Saraiva |
| 0-1 | 75 | 2014 | Reykjavik Open | B01 Scandinavian |
| 8. H Sigurvaldason vs A Byron |
| 0-1 | 40 | 2015 | Reykjavik Open | A45 Queen's Pawn Game |
| 9. P Korning vs H Sigurvaldason |
| 1-0 | 48 | 2015 | Reykjavik Open | B21 Sicilian, 2.f4 and 2.d4 |
| 10. B Sigurdsson vs H Sigurvaldason |
| 1-0 | 45 | 2015 | Reykjavik Open | D35 Queen's Gambit Declined |
| 11. H Sigurvaldason vs M Murray |
 | 0-1 | 19 | 2016 | Reykjavik Open | A40 Queen's Pawn Game |
| 12. D Andersen vs H Sigurvaldason |
| 1-0 | 68 | 2016 | Reykjavik Open | A09 Reti Opening |
| 13. H Sigurvaldason vs V Magnusdottir |
| 0-1 | 44 | 2016 | Reykjavik Open | A31 English, Symmetrical, Benoni Formation |
| 14. H Sigurvaldason vs S Maroroa |
| 0-1 | 47 | 2017 | Reykjavik Open | C45 Scotch Game |
| 15. D Opasiak vs H Sigurvaldason |
| 1-0 | 62 | 2017 | Reykjavik Open | C42 Petrov Defense |
| 16. H Sigurvaldason vs S Fridthjofsdottir |
| ½-½ | 69 | 2017 | Reykjavik Open | C14 French, Classical |
| 17. M M Berg vs H Sigurvaldason |
| 1-0 | 84 | 2017 | Reykjavik Open | A45 Queen's Pawn Game |
| 18. H Sigurvaldason vs P Andrason |
| 0-1 | 60 | 2018 | Reykjavik Open | B50 Sicilian |
| 19. S Danielsson vs H Sigurvaldason |
| 0-1 | 34 | 2018 | Reykjavik Open | B20 Sicilian |
| 20. H Sigurvaldason vs Henri van den Bersselaar |
| 0-1 | 45 | 2018 | Reykjavik Open | B00 Uncommon King's Pawn Opening |
| 21. S Pedersen vs H Sigurvaldason |
| 0-1 | 47 | 2018 | Reykjavik Open | D10 Queen's Gambit Declined Slav |
| 22. H Sigurvaldason vs M Magnusson |
| 0-1 | 40 | 2018 | Reykjavik Open | E21 Nimzo-Indian, Three Knights |
| 23. D Mirza vs H Sigurvaldason |
| 1-0 | 48 | 2018 | Reykjavik Open | D02 Queen's Pawn Game |
| 24. H Sigurvaldason vs W F Forster |
| 0-1 | 38 | 2019 | Reykjavik Open | D02 Queen's Pawn Game |
| 25. T Valtysson vs H Sigurvaldason |
| 1-0 | 32 | 2019 | Reykjavik Open | D02 Queen's Pawn Game |
Kibitzing
