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| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. T Thorhallsson vs Seirawan |
| 0-1 | 38 | 1986 | Reykjavik Open | C15 French, Winawer |
| 2. T Thorhallsson vs T Arnason |
| 1-0 | 29 | 1986 | Icelandic Championship | C15 French, Winawer |
| 3. T Thorhallsson vs T Kokkila |
| 1-0 | 23 | 1987 | World Junior Championship | C15 French, Winawer |
| 4. T Thorhallsson vs S Bjarnason |
| 1-0 | 41 | 1987 | Icelandic Championship | C15 French, Winawer |
| 5. T Thorhallsson vs Seirawan |
| 0-1 | 73 | 1990 | Reykjavik Open | C15 French, Winawer |
| 6. T Thorhallsson vs S Arkhipov |
| 1-0 | 43 | 1991 | Peer Gynt | C15 French, Winawer |
| 7. T Thorhallsson vs J Levitt |
| ½-½ | 28 | 1992 | Hafnarfirdi | C15 French, Winawer |
| 8. T Thorhallsson vs E Tonning |
| 1-0 | 19 | 1994 | Peer Gynt | C15 French, Winawer |
| 9. T Thorhallsson vs G Fant |
| 1-0 | 25 | 1994 | Gausdal International | C15 French, Winawer |
| 10. T Thorhallsson vs J Sigurjonsson |
| ½-½ | 18 | 1995 | ISL-chT | C15 French, Winawer |
| 11. T Thorhallsson vs V Moskalenko |
| 0-1 | 48 | 1995 | Copenhagen Open | C15 French, Winawer |
| 12. T Thorhallsson vs S Kishnev |
| 0-1 | 46 | 2001 | European Club Cup | C15 French, Winawer |
| 13. T Thorhallsson vs I Johannesson |
 | 1-0 | 47 | 2003 | ISL-ch | C15 French, Winawer |
| 14. T Thorhallsson vs P Nikolic |
| 0-1 | 47 | 2003 | 2nd Milk Tournament | C15 French, Winawer |
| 15. T Thorhallsson vs J V Gunnarsson |
| ½-½ | 42 | 2004 | Reykjavik Open | C15 French, Winawer |
| 16. T Thorhallsson vs Shulman |
| 0-1 | 28 | 2009 | Reykjavik Open | C15 French, Winawer |
| 17. T Thorhallsson vs E Goossens |
| 1-0 | 39 | 2011 | European Club Cup | C15 French, Winawer |
| 18. T Thorhallsson vs E Player |
| 1-0 | 55 | 2012 | e2e4 Basingstoke Int Open | C15 French, Winawer |
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Kibitzing
