| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. K Pulkkinen vs B Ostenstad |
| 0-1 | 47 |
1983 |
Nordic-tt | D42 Queen's Gambit Declined, Semi-Tarrasch, 7.Bd3 |
| 2. B Ostenstad vs Petursson |
| ½-½ | 52 |
1985 |
Norway | D34 Queen's Gambit Declined, Tarrasch |
| 3. Larsen vs B Ostenstad |
| 1-0 | 44 |
1985 |
Gausdal zt | A38 English, Symmetrical |
| 4. B Ostenstad vs Hebden |
| 0-1 | 38 |
1987 |
Gausdal Internationa | A43 Old Benoni |
| 5. Zsuzsa Polgar vs B Ostenstad |
| 1-0 | 58 |
1988 |
Reykjavik op | E69 King's Indian, Fianchetto, Classical Main line |
| 6. A Thorsteinsson vs B Ostenstad |
| ½-½ | 44 |
1988 |
Reykjavik cq | C55 Two Knights Defense |
| 7. Jansa vs B Ostenstad |
| 1-0 | 32 |
1988 |
Gausdal | B10 Caro-Kann |
| 8. Lautier vs B Ostenstad |
| 1-0 | 31 |
1988 |
It shv | D86 Grunfeld, Exchange |
| 9. B Ostenstad vs Christiansen |
| 1-0 | 63 |
1988 |
It (open) | A48 King's Indian |
| 10. B Ostenstad vs Polugaevsky |
| 0-1 | 39 |
1988 |
Reykjavik op | E15 Queen's Indian |
| 11. N Davies vs B Ostenstad |
| 1-0 | 34 |
1988 |
Oslo (Norway) | B01 Scandinavian |
| 12. B Ostenstad vs Jansa |
| ½-½ | 30 |
1988 |
Oslo | A48 King's Indian |
| 13. Petursson vs B Ostenstad |
| 0-1 | 39 |
1988 |
Ch Bayern | E11 Bogo-Indian Defense |
| 14. Rafael Alvarez Ibarra vs B Ostenstad |
| ½-½ | 37 |
1989 |
EU-chT (Men) | B14 Caro-Kann, Panov-Botvinnik Attack |
| 15. Blatny vs B Ostenstad |
| ½-½ | 47 |
1989 |
Czech Republic | B14 Caro-Kann, Panov-Botvinnik Attack |
| 16. B Ostenstad vs Hug |
| ½-½ | 20 |
1989 |
EU-chT (Men) | E61 King's Indian |
| 17. B Ostenstad vs Savon |
| ½-½ | 16 |
1989 |
Tirnavia-B | E94 King's Indian, Orthodox |
| 18. Wojtkiewicz vs B Ostenstad |
| 1-0 | 47 |
1989 |
Cup Atlantic tt | E17 Queen's Indian |
| 19. M Marin vs B Ostenstad |
| ½-½ | 37 |
1989 |
EU-chT (Men) | D87 Grunfeld, Exchange |
| 20. I Bilek vs B Ostenstad |
| ½-½ | 42 |
1989 |
Trnava (Czech Republic) | E67 King's Indian, Fianchetto |
| 21. B Ostenstad vs Stohl |
| 0-1 | 28 |
1989 |
Trnava II | D03 Torre Attack (Tartakower Variation) |
| 22. B Ostenstad vs W Wittmann |
| ½-½ | 29 |
1989 |
EU-chT (Men) | E91 King's Indian |
| 23. Petursson vs B Ostenstad |
| 1-0 | 71 |
1989 |
Espoo zt | E36 Nimzo-Indian, Classical |
| 24. Larsen vs B Ostenstad |
| 1-0 | 63 |
1989 |
Espoo zt | A01 Nimzovich-Larsen Attack |
| 25. B Ostenstad vs V Maki |
| 1-0 | 35 |
1989 |
EU-chT (Men) | E60 King's Indian Defense |