| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. S Fedder vs T Arnason |
| ½-½ | 27 | 1990 | Copenhagen Open | D31 Queen's Gambit Declined |
| 52. T Arnason vs O Jakobsen |
| ½-½ | 34 | 1990 | Copenhagen Open | E75 King's Indian, Averbakh, Main line |
| 53. A Sznapik vs T Arnason |
| 1-0 | 33 | 1990 | Copenhagen Open | C11 French |
| 54. T Arnason vs J Adamski |
| 1-0 | 38 | 1990 | Copenhagen Open | E38 Nimzo-Indian, Classical, 4...c5 |
| 55. J Arnason vs T Arnason |
 | 1-0 | 26 | 1990 | ISL-ch | C10 French |
| 56. T Arnason vs Van Wely |
| ½-½ | 31 | 1994 | Reykjavik Open | E67 King's Indian, Fianchetto |
| 57. Shabalov vs T Arnason |
| 1-0 | 35 | 1994 | Reykjavik Open | C18 French, Winawer |
| 58. Bronstein vs T Arnason |
| 1-0 | 38 | 1994 | Reykjavik Open | C15 French, Winawer |
| 59. T Arnason vs K Edvardsson |
| 1-0 | 41 | 1994 | Reykjavik Open | E73 King's Indian |
| 60. B Bjornsson vs T Arnason |
| ½-½ | 42 | 1994 | Reykjavik Open | E00 Queen's Pawn Game |
| 61. T Arnason vs B Thorfinnsson |
| 0-1 | 44 | 1994 | Reykjavik Open | E01 Catalan, Closed |
| 62. J V Gunnarsson vs T Arnason |
| 1-0 | 57 | 1994 | Reykjavik Open | C02 French, Advance |
| 63. T Arnason vs J L Burden |
| 1-0 | 35 | 1994 | Reykjavik Open | E73 King's Indian |
| 64. M Ulfarsson vs T Arnason |
| 0-1 | 26 | 1994 | Reykjavik Open | C18 French, Winawer |
| 65. T Arnason vs H A Gretarsson |
| 0-1 | 19 | 2000 | ISL-chT | D02 Queen's Pawn Game |
| 66. T Arnason vs H Olafsson |
| 0-1 | 33 | 2016 | TCh-ISL Div 1 -17 | A04 Reti Opening |
| 67. Petursson vs T Arnason |
| 1-0 | 31 | 2016 | TCh-ISL Div 1 -17 | B10 Caro-Kann |
| 68. T Arnason vs H Olafsson |
| 0-1 | 38 | 2017 | ISL-chT Div 1 2017/18 | E60 King's Indian Defense |
| 69. T Arnason vs A Jakubiec |
| 0-1 | 38 | 2017 | ISL-chT Div 1 2017/18 | A87 Dutch, Leningrad, Main Variation |
Kibitzing
