| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. R Nokes vs O Jackson |
| 1-0 | 41 |
1981 |
BCF-ch | B43 Sicilian, Kan, 5.Nc3 |
| 2. Hartston vs O Jackson |
| 1-0 | 40 |
1981 |
BCF-ch | A48 King's Indian |
| 3. G Timoshchenko vs O Jackson |
| 1-0 | 31 |
1990 |
Hastings Challengers 9091 | A52 Budapest Gambit |
| 4. O Jackson vs T Rahman |
| 1-0 | 35 |
1991 |
Ch Great Britain, Great Britai | C33 King's Gambit Accepted |
| 5. G Timoshchenko vs O Jackson |
 | 1-0 | 20 |
1991 |
Hastings Challengers 9192 | A52 Budapest Gambit |
| 6. Hebden vs O Jackson |
| 1-0 | 40 |
1995 |
British ch | A46 Queen's Pawn Game |
| 7. O Jackson vs C Tippleston |
| 1-0 | 43 |
1999 |
Ch Great Britain, Scarborough (England) | B23 Sicilian, Closed |
| 8. O Jackson vs P McMahon |
| 1-0 | 22 |
1999 |
Ch Great Britain, Scarborough (England) | C36 King's Gambit Accepted, Abbazia Defense |
| 9. C Storey vs O Jackson |
| 1-0 | 37 |
1999 |
Ch Great Britain, Scarborough (England) | B40 Sicilian |
| 10. A Gokhale vs O Jackson |
| 1-0 | 59 |
1999 |
Ch Great Britain, Scarborough (England) | D08 Queen's Gambit Declined, Albin Counter Gambit |
| 11. O Jackson vs L Lee |
| 1-0 | 27 |
1999 |
Ch Great Britain, Scarborough (England) | B21 Sicilian, 2.f4 and 2.d4 |
| 12. S Scannell vs O Jackson |
| 1-0 | 38 |
1999 |
Ch Great Britain, Scarborough (England) | A57 Benko Gambit |
| 13. R Palliser vs O Jackson |
| 1-0 | 39 |
1999 |
Ch Great Britain, Scarborough (England) | D08 Queen's Gambit Declined, Albin Counter Gambit |
| 14. O Jackson vs D Grassie |
| 1-0 | 30 |
2006 |
European Union Individual Championships | C11 French |
| 15. J Humphreys vs O Jackson |
| 1-0 | 47 |
2006 |
Hastings Chess Congress | B43 Sicilian, Kan, 5.Nc3 |
| 16. M Karttunen vs O Jackson |
| 1-0 | 24 |
2006 |
European Union Individual Championships | D08 Queen's Gambit Declined, Albin Counter Gambit |
| 17. O Jackson vs I Campbell |
| 1-0 | 58 |
2006 |
European Union Individual Championships | B02 Alekhine's Defense |
| 18. Conquest vs O Jackson |
| 1-0 | 36 |
2006 |
European Union Individual Championships | A04 Reti Opening |
| 19. O Jackson vs P Cafolla |
| 1-0 | 24 |
2007 |
Isle of Man International | B23 Sicilian, Closed |
| 20. O Jackson vs I Marks |
| 1-0 | 52 |
2007 |
Isle of Man International | B23 Sicilian, Closed |
| 21. A Walton vs O Jackson |
| 1-0 | 28 |
2007 |
Isle of Man International | A45 Queen's Pawn Game |
| 22. E Shachar vs O Jackson |
| 1-0 | 47 |
2007 |
Isle of Man International | A04 Reti Opening |
| 23. T Abergel vs O Jackson |
| 1-0 | 17 |
2007 |
Isle of Man International | B81 Sicilian, Scheveningen, Keres Attack |
| 24. O Jackson vs J Quinn |
| 1-0 | 27 |
2007 |
83rd Hastings Chess Congress | C39 King's Gambit Accepted |
| 25. O Jackson vs D Oates |
| 1-0 | 57 |
2008 |
83rd Hastings Chess Congress | B23 Sicilian, Closed |
