| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. O Jackson vs T Rahman |
| 1-0 | 35 |
1991 |
Ch Great Britain, Great Britai | C33 King's Gambit Accepted |
| 2. O Jackson vs C Tippleston |
| 1-0 | 43 |
1999 |
Ch Great Britain, Scarborough (England) | B23 Sicilian, Closed |
| 3. O Jackson vs P McMahon |
| 1-0 | 22 |
1999 |
Ch Great Britain, Scarborough (England) | C36 King's Gambit Accepted, Abbazia Defense |
| 4. O Jackson vs L Lee |
| 1-0 | 27 |
1999 |
Ch Great Britain, Scarborough (England) | B21 Sicilian, 2.f4 and 2.d4 |
| 5. A Legge vs O Jackson |
| 0-1 | 49 |
2006 |
European Union Individual Championships | B48 Sicilian, Taimanov Variation |
| 6. R Webster vs O Jackson |
| 0-1 | 24 |
2006 |
Hastings Chess Congress | A20 English |
| 7. G O'Toole vs O Jackson |
| 0-1 | 31 |
2006 |
Hastings Chess Congress | B22 Sicilian, Alapin |
| 8. O Jackson vs I Campbell |
| 1-0 | 58 |
2006 |
European Union Individual Championships | B02 Alekhine's Defense |
| 9. O Jackson vs D Grassie |
| 1-0 | 30 |
2006 |
European Union Individual Championships | C11 French |
| 10. O Jackson vs J Quinn |
 | 1-0 | 27 |
2007 |
83rd Hastings Chess Congress | C39 King's Gambit Accepted |
| 11. O Jackson vs I Marks |
| 1-0 | 52 |
2007 |
Isle of Man International | B23 Sicilian, Closed |
| 12. M Pavlovic vs O Jackson |
| 0-1 | 42 |
2007 |
Isle of Man International | A41 Queen's Pawn Game (with ...d6) |
| 13. O Jackson vs P Cafolla |
| 1-0 | 24 |
2007 |
Isle of Man International | B23 Sicilian, Closed |
| 14. A Hagesaether vs O Jackson |
| 0-1 | 74 |
2007 |
83rd Hastings Chess Congress | B43 Sicilian, Kan, 5.Nc3 |
| 15. N Hutchinson vs O Jackson |
| 0-1 | 27 |
2007 |
Hastings Chess Congress | B40 Sicilian |
| 16. J Murray vs O Jackson |
| 0-1 | 38 |
2008 |
Guernsey Open | B40 Sicilian |
| 17. D Fryer vs O Jackson |
| 0-1 | 46 |
2008 |
83rd Hastings Chess Congress | B23 Sicilian, Closed |
| 18. O Jackson vs D Oates |
| 1-0 | 57 |
2008 |
83rd Hastings Chess Congress | B23 Sicilian, Closed |
| 19. O Jackson vs A Wilson |
| 1-0 | 44 |
2008 |
83rd Hastings Chess Congress | C19 French, Winawer, Advance |
| 20. O Jackson vs B Rolvaag |
| 1-0 | 20 |
2008 |
Hastings Chess Congress | B23 Sicilian, Closed |
