| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. S Thorhallsson vs T Thorsteinsson |
| ½-½ | 57 | 2018 | Reykjavik Open | A56 Benoni Defense |
| 27. O Bewersdorff vs S Thorhallsson |
| 1-0 | 28 | 2018 | Reykjavik Open | E63 King's Indian, Fianchetto, Panno Variation |
| 28. S Thorhallsson vs B Briem |
| 1-0 | 43 | 2018 | Reykjavik Open | A96 Dutch, Classical Variation |
| 29. G Lorscheid vs S Thorhallsson |
| 0-1 | 27 | 2018 | Reykjavik Open | E73 King's Indian |
| 30. S Thorhallsson vs T Abrahamyan |
| ½-½ | 40 | 2018 | Reykjavik Open | A62 Benoni, Fianchetto Variation |
| 31. L Unuk vs S Thorhallsson |
| 1-0 | 39 | 2018 | Reykjavik Open | E63 King's Indian, Fianchetto, Panno Variation |
| 32. S Thorhallsson vs D Ilkov |
| 1-0 | 66 | 2018 | Reykjavik Open | E06 Catalan, Closed, 5.Nf3 |
| 33. E O Risting vs S Thorhallsson |
| 1-0 | 32 | 2018 | Reykjavik Open | A05 Reti Opening |
| 34. S Thorhallsson vs M Cornette |
| 0-1 | 49 | 2019 | Reykjavik Open | B00 Uncommon King's Pawn Opening |
| 35. M Feuerstein vs S Thorhallsson |
| 0-1 | 29 | 2019 | Reykjavik Open | A36 English |
| 36. S Thorhallsson vs H S Gretarsson |
| 0-1 | 72 | 2019 | Reykjavik Open | E00 Queen's Pawn Game |
| 37. S Thorhallsson vs G P Jonsson |
| 1-0 | 33 | 2019 | Reykjavik Open | A96 Dutch, Classical Variation |
| 38. J A Finnsson vs S Thorhallsson |
| 0-1 | 44 | 2019 | Reykjavik Open | B50 Sicilian |
| 39. S Thorhallsson vs N Djukic |
| 0-1 | 43 | 2019 | Reykjavik Open | E81 King's Indian, Samisch |
| 40. S Thorhallsson vs D Gukesh |
| 0-1 | 30 | 2019 | Reykjavik Open | E85 King's Indian, Samisch, Orthodox Variation |
| 41. B Thorfinnsson vs S Thorhallsson |
| 1-0 | 23 | 2019 | TCh-ISL Div 1 -20 | A48 King's Indian |
| 42. S Thorhallsson vs B Thorfinnsson |
| 0-1 | 52 | 2020 | Reykjavik CC Autumn | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 43. G Kjartansson vs S Thorhallsson |
| 1-0 | 27 | 2020 | Reykjavik CC Autumn | A46 Queen's Pawn Game |
| 44. S Thorhallsson vs H A Gretarsson |
| 0-1 | 46 | 2020 | Reykjavik CC Autumn | B07 Pirc |
| 45. H S Gretarsson vs S Thorhallsson |
| 1-0 | 29 | 2020 | Reykjavik CC Autumn | A77 Benoni, Classical, 9...Re8, 10.Nd2 |
| 46. M Bartel vs S Thorhallsson |
| 1-0 | 26 | 2021 | European Championship | C00 French Defense |
| 47. G Quparadze vs S Thorhallsson |
| 1-0 | 32 | 2021 | European Championship | B90 Sicilian, Najdorf |
| 48. Ftacnik vs S Thorhallsson |
| ½-½ | 35 | 2021 | European Championship | A35 English, Symmetrical |
| 49. S Thorhallsson vs H A Gretarsson |
| ½-½ | 44 | 2021 | European Championship | C58 Two Knights |
| 50. L Vrolijk vs S Thorhallsson |
| 1-0 | 36 | 2021 | European Championship | E97 King's Indian |
Kibitzing
