| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. Chandler vs K Thorsteins |
| 1-0 | 19 | 1979 | London | B30 Sicilian |
| 2. K Thorsteins vs Granda Zuniga |
 | 0-1 | 41 | 1982 | Peao de Ouro Youth Tournament | E88 King's Indian, Samisch, Orthodox, 7.d5 c6 |
| 3. A Bettsak vs K Thorsteins |
| 0-1 | 22 | 1982 | Peao de Ouro Youth Tournament | D43 Queen's Gambit Declined Semi-Slav |
| 4. A Kuznecov vs K Thorsteins |
| 0-1 | 44 | 1982 | Peao de Ouro Youth Tournament | A14 English |
| 5. K Thorsteins vs G G de Carvalho |
| 1-0 | 28 | 1982 | Peao de Ouro Youth Tournament | A00 Uncommon Opening |
| 6. A A Correa vs K Thorsteins |
| ½-½ | 52 | 1982 | Peao de Ouro Youth Tournament | A14 English |
| 7. K Thorsteins vs M Braitt |
| 1-0 | 41 | 1982 | Peao de Ouro Youth Tournament | A48 King's Indian |
| 8. S H Trindade vs K Thorsteins |
| ½-½ | 46 | 1982 | Peao de Ouro Youth Tournament | B06 Robatsch |
| 9. K Thorsteins vs I B de Souza |
| 1-0 | 55 | 1982 | Peao de Ouro Youth Tournament | D55 Queen's Gambit Declined |
| 10. S Zakic vs K Thorsteins |
| 0-1 | 40 | 1982 | Peao de Ouro Youth Tournament | B84 Sicilian, Scheveningen |
| 11. K Thorsteins vs Dlugy |
| 1-0 | 37 | 1982 | Peao de Ouro Youth Tournament | A40 Queen's Pawn Game |
| 12. I Wells vs K Thorsteins |
| 0-1 | 35 | 1982 | Peao de Ouro Youth Tournament | B80 Sicilian, Scheveningen |
| 13. K Thorsteins vs R Lutz |
| ½-½ | 57 | 1982 | Peao de Ouro Youth Tournament | E06 Catalan, Closed, 5.Nf3 |
| 14. C A Dona Paterson vs K Thorsteins |
| 1-0 | 73 | 1982 | Peao de Ouro Youth Tournament | A16 English |
| 15. K Thorsteins vs S Saeed |
| ½-½ | 108 | 1982 | Peao de Ouro Youth Tournament | A13 English |
| 16. T Darcyl vs K Thorsteins |
| 0-1 | 31 | 1982 | Peao de Ouro Youth Tournament | B06 Robatsch |
| 17. K Thorsteins vs Granda Zuniga |
| ½-½ | 45 | 1982 | Peao de Ouro playoff | A35 English, Symmetrical |
| 18. K Thorsteins vs Granda Zuniga |
| 1-0 | 60 | 1982 | Peao de Ouro playoff | A35 English, Symmetrical |
| 19. Granda Zuniga vs K Thorsteins |
| 0-1 | 79 | 1982 | Peao de Ouro playoff | B80 Sicilian, Scheveningen |
| 20. K Thorsteins vs B Abramovic |
| 0-1 | 32 | 1982 | Reykjavik Open | A13 English |
| 21. J Jonsson vs K Thorsteins |
| ½-½ | 35 | 1982 | Reykjavik Open | B32 Sicilian |
| 22. K Bischoff vs K Thorsteins |
| ½-½ | 31 | 1982 | Reykjavik Open | A49 King's Indian, Fianchetto without c4 |
| 23. J G Jonsson vs K Thorsteins |
| ½-½ | 44 | 1982 | Reykjavik Open | B20 Sicilian |
| 24. K Thorsteins vs G Iskov |
| 0-1 | 36 | 1982 | Reykjavik Open | A49 King's Indian, Fianchetto without c4 |
| 25. E Gudmundsson vs K Thorsteins |
| ½-½ | 30 | 1982 | Reykjavik Open | A31 English, Symmetrical, Benoni Formation |
Kibitzing
