| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. O Sepp vs G O'Connell |
| 1-0 | 39 |
1992 |
EU-chT (Men) | B20 Sicilian |
| 2. Miles vs G O'Connell |
| 1-0 | 60 |
1993 |
Dublin zt | A48 King's Indian |
| 3. Hebden vs G O'Connell |
| 1-0 | 44 |
1998 |
Iona Tech Masters, Kilkenny | A48 King's Indian |
| 4. T Nedev vs G O'Connell |
| 1-0 | 62 |
1999 |
EU-chT (Men) | B22 Sicilian, Alapin |
| 5. G O'Connell vs Marc Geenen |
| 0-1 | 37 |
1999 |
EU-chT (Men) | E94 King's Indian, Orthodox |
| 6. G O'Connell vs J Grant |
| 0-1 | 39 |
1999 |
EU-chT (Men) | E41 Nimzo-Indian |
| 7. M Agopov vs G O'Connell |
| 1-0 | 25 |
1999 |
EU-chT (Men) | A15 English |
| 8. G O'Connell vs N Miezis |
| 0-1 | 34 |
1999 |
EU-chT (Men) | A60 Benoni Defense |
| 9. Tiviakov vs G O'Connell |
| 1-0 | 34 |
1999 |
Bunratty Open | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 10. M Marin vs G O'Connell |
| 1-0 | 55 |
1999 |
EU-chT (Men) | A16 English |
| 11. K Haznedaroglu vs G O'Connell |
| 1-0 | 55 |
1999 |
EU-chT (Men) | B50 Sicilian |
| 12. G O'Connell vs G Danner |
| 0-1 | 19 |
1999 |
EU-chT (Men) | A87 Dutch, Leningrad, Main Variation |
| 13. S Duffy vs G O'Connell |
| 1-0 | 63 |
2008 |
Irish Championship | B22 Sicilian, Alapin |
| 14. G O'Connell vs Baburin |
| 0-1 | 51 |
2008 |
Irish Championship | D15 Queen's Gambit Declined Slav |
| 15. A Fox vs G O'Connell |
| 1-0 | 30 |
2008 |
Irish Championship | B26 Sicilian, Closed, 6.Be3 |
| 16. G O'Connell vs S Jessel |
| 0-1 | 42 |
2008 |
Irish Championship | A10 English |
