| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. O Kanmazalp vs H Agustsson |
| 1-0 | 30 | 2017 | Reykjavik Open | B30 Sicilian |
| 27. H Agustsson vs L Apol |
| 1-0 | 34 | 2017 | Reykjavik Open | B95 Sicilian, Najdorf, 6...e6 |
| 28. M Kiese vs H Agustsson |
| 1-0 | 32 | 2017 | Reykjavik Open | D55 Queen's Gambit Declined |
| 29. H Agustsson vs I Vignisson |
| 1-0 | 28 | 2017 | Reykjavik Open | B96 Sicilian, Najdorf |
| 30. A J Walton vs H Agustsson |
| 1-0 | 24 | 2017 | Reykjavik Open | D31 Queen's Gambit Declined |
| 31. H Agustsson vs J Ontiveros |
| 1-0 | 57 | 2017 | Reykjavik Open | B70 Sicilian, Dragon Variation |
| 32. A Yakimenko vs H Agustsson |
| 1-0 | 30 | 2017 | Reykjavik Open | B23 Sicilian, Closed |
| 33. H Agustsson vs Orn Alexandersson |
| 1-0 | 47 | 2018 | Reykjavik Open | C11 French |
| 34. G Adocchio vs H Agustsson |
| 1-0 | 22 | 2018 | Reykjavik Open | B33 Sicilian |
| 35. H Agustsson vs Albert Tsanaclis |
| 1-0 | 41 | 2018 | Reykjavik Open | B36 Sicilian, Accelerated Fianchetto |
| 36. M Buscar vs H Agustsson |
| 1-0 | 35 | 2018 | Reykjavik Open | D31 Queen's Gambit Declined |
| 37. H Agustsson vs D Coleman |
| 1-0 | 48 | 2018 | Reykjavik Open | E83 King's Indian, Samisch |
| 38. N Navalgund vs H Agustsson |
| 1-0 | 30 | 2018 | Reykjavik Open | E04 Catalan, Open, 5.Nf3 |
| 39. H Agustsson vs M Karlsson |
| 0-1 | 39 | 2018 | Reykjavik Open | B32 Sicilian |
| 40. E O Hjaltason vs H Agustsson |
| 0-1 | 32 | 2018 | Reykjavik Open | E48 Nimzo-Indian, 4.e3 O-O 5.Bd3 d5 |
| 41. B Stefansson vs H Agustsson |
| 0-1 | 25 | 2019 | Reykjavik Open | B33 Sicilian |
| 42. H Agustsson vs A Esbensen |
| 0-1 | 39 | 2019 | Reykjavik Open | C42 Petrov Defense |
| 43. Boris Stoyanov vs H Agustsson |
| ½-½ | 27 | 2019 | Reykjavik Open | B30 Sicilian |
| 44. H Agustsson vs H Giacomini |
| 0-1 | 54 | 2019 | Reykjavik Open | B13 Caro-Kann, Exchange |
| 45. S Svergina vs H Agustsson |
| 1-0 | 32 | 2019 | Reykjavik Open | B33 Sicilian |
| 46. H Agustsson vs O Sigfusson |
| 1-0 | 38 | 2019 | Reykjavik Open | A80 Dutch |
| 47. Ftacnik vs H Agustsson |
| 1-0 | 29 | 2021 | European Championship | D37 Queen's Gambit Declined |
| 48. A T Mai vs H Agustsson |
| 0-1 | 44 | 2021 | European Championship | A07 King's Indian Attack |
| 49. H Agustsson vs S Butenandt |
| 0-1 | 55 | 2021 | European Championship | A04 Reti Opening |
| 50. M Karlsson vs H Agustsson |
| 1-0 | 30 | 2021 | European Championship | E04 Catalan, Open, 5.Nf3 |
Kibitzing
