| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. P W Stuart vs T Thorsteinsson |
| 0-1 | 38 | 1972 | Skopje Olympiad qual-4 | A22 English |
| 2. H Hecht vs T Thorsteinsson |
| 1-0 | 45 | 1972 | Skopje Olympiad qual-4 | A06 Reti Opening |
| 3. C Escondrillas vs T Thorsteinsson |
| 0-1 | 37 | 1972 | Skopje Olympiad qual-4 | C74 Ruy Lopez, Modern Steinitz Defense |
| 4. T Thorsteinsson vs J Rubinetti |
| 0-1 | 75 | 1972 | Skopje Olympiad qual-4 | C95 Ruy Lopez, Closed, Breyer |
| 5. T Thorsteinsson vs N Skalkotas |
| ½-½ | 22 | 1972 | Skopje Olympiad Final-B | C04 French, Tarrasch, Guimard Main line |
| 6. P Tumurbator vs T Thorsteinsson |
| 0-1 | 29 | 1972 | Skopje Olympiad Final-B | C53 Giuoco Piano |
| 7. C Pesantes Carbajal vs T Thorsteinsson |
| 0-1 | 38 | 1972 | Skopje Olympiad Final-B | E47 Nimzo-Indian, 4.e3 O-O 5.Bd3 |
| 8. T Thorsteinsson vs Floran Vila |
| 1-0 | 25 | 1972 | Skopje Olympiad Final-B | B89 Sicilian |
| 9. F van Seters vs T Thorsteinsson |
| 1-0 | 38 | 1972 | Skopje Olympiad Final-B | E46 Nimzo-Indian |
| 10. T Thorsteinsson vs E Cobo Arteaga |
| ½-½ | 38 | 1972 | Skopje Olympiad Final-B | B33 Sicilian |
| 11. T Thorsteinsson vs P Biyiasas |
| 0-1 | 38 | 1972 | Skopje Olympiad Final-B | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 12. R Rodriguez vs T Thorsteinsson |
 | 1-0 | 39 | 1972 | Skopje Olympiad Final-B | C99 Ruy Lopez, Closed, Chigorin, 12...cd |
| 13. Y Kraidman vs T Thorsteinsson |
| 1-0 | 51 | 1972 | Skopje Olympiad Final-B | E19 Queen's Indian, Old Main line, 9.Qxc3 |
| 14. S Mariotti vs T Thorsteinsson |
| ½-½ | 14 | 1972 | Skopje Olympiad Final-B | E23 Nimzo-Indian, Spielmann |
| 15. T Thorsteinsson vs K Roehrl |
| ½-½ | 40 | 1972 | Skopje Olympiad Final-B | B09 Pirc, Austrian Attack |
| 16. R Bjerke vs T Thorsteinsson |
| 1-0 | 42 | 1982 | Hamar Astoria | D15 Queen's Gambit Declined Slav |
| 17. T Thorsteinsson vs J Cox |
| 0-1 | 70 | 1982 | Hamar Astoria | A25 English |
| 18. T Heiberg vs T Thorsteinsson |
| 0-1 | 67 | 1982 | Hamar Astoria | E67 King's Indian, Fianchetto |
| 19. T Thorsteinsson vs K Berg |
| ½-½ | 12 | 1982 | Hamar Astoria | A04 Reti Opening |
| 20. T Thorsteinsson vs S A Johansen |
| ½-½ | 41 | 1982 | Hamar Astoria | A07 King's Indian Attack |
| 21. T Thorsteinsson vs B Heggheim |
| ½-½ | 36 | 1982 | Hamar Astoria | A30 English, Symmetrical |
| 22. T Thorsteinsson vs R Elseth |
| ½-½ | 52 | 1982 | Hamar Astoria | A04 Reti Opening |
| 23. D de Lange vs T Thorsteinsson |
| 1-0 | 49 | 1982 | Hamar Astoria | D15 Queen's Gambit Declined Slav |
| 24. O S Ormasen vs T Thorsteinsson |
| 0-1 | 35 | 1982 | Hamar Astoria | D10 Queen's Gambit Declined Slav |
| 25. Kudrin vs T Thorsteinsson |
| 1-0 | 46 | 1986 | Reykjavik Open | B70 Sicilian, Dragon Variation |
Kibitzing
