| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. O'Kelly vs Szabo |
| 1-0 | 46 |
1947 |
Zonal | E69 King's Indian, Fianchetto, Classical Main line |
| 2. O'Kelly vs I Johansson |
| 1-0 | 35 |
1950 |
Dubrovnik olm | E67 King's Indian, Fianchetto |
| 3. O'Kelly vs Najdorf |
 | 0-1 | 39 |
1950 |
Dubrovnik | E67 King's Indian, Fianchetto |
| 4. O'Kelly vs C B Van den Berg |
| ½-½ | 42 |
1950 |
Amsterdam (Netherlands) | E94 King's Indian, Orthodox |
| 5. O'Kelly vs Gligoric |
| 0-1 | 41 |
1950 |
Amsterdam (Netherlands) | E64 King's Indian, Fianchetto, Yugoslav System |
| 6. O'Kelly vs Petrosian |
| ½-½ | 32 |
1952 |
Budapest | E67 King's Indian, Fianchetto |
| 7. O'Kelly vs F Olafsson |
| ½-½ | 48 |
1953 |
Hastings | E69 King's Indian, Fianchetto, Classical Main line |
| 8. O'Kelly vs Tartakower |
| 1-0 | 70 |
1953 |
Hastings | E62 King's Indian, Fianchetto |
| 9. O'Kelly vs Nezhmetdinov |
| ½-½ | 61 |
1954 |
Bucharest | E68 King's Indian, Fianchetto, Classical Variation, 8.e4 |
| 10. O'Kelly vs T Salo |
| ½-½ | 43 |
1954 |
Amsterdam ol (Men) | E67 King's Indian, Fianchetto |
| 11. O'Kelly vs V Ciocaltea |
| ½-½ | 36 |
1956 |
Olympiad | E63 King's Indian, Fianchetto, Panno Variation |
| 12. O'Kelly vs L Endzelins |
| 1-0 | 39 |
1959 |
corr-3 | E87 King's Indian, Samisch, Orthodox |
| 13. O'Kelly vs P Dubinin |
| ½-½ | 42 |
1959 |
corr-3 | E80 King's Indian, Samisch Variation |
| 14. O'Kelly vs Gligoric |
| 0-1 | 36 |
1960 |
Madrid zt | E93 King's Indian, Petrosian System |
| 15. O'Kelly vs A M Giustolisi |
| 1-0 | 41 |
1960 |
Madrid | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 16. O'Kelly vs Pachman |
| 0-1 | 46 |
1960 |
Madrid | E88 King's Indian, Samisch, Orthodox, 7.d5 c6 |
| 17. O'Kelly vs J Johansson |
| ½-½ | 30 |
1962 |
Olympiad | E82 King's Indian, Samisch, double Fianchetto Variation |
| 18. O'Kelly vs Geller |
| 0-1 | 24 |
1963 |
Havana | E83 King's Indian, Samisch |
| 19. O'Kelly vs E Gereben |
| 1-0 | 46 |
1963 |
Hoogovens | E87 King's Indian, Samisch, Orthodox |
| 20. O'Kelly vs G E Ramirez |
| 1-0 | 18 |
1963 |
Malaga | E83 King's Indian, Samisch |
| 21. O'Kelly vs Pilnik |
| 1-0 | 57 |
1963 |
Hoogovens | E84 King's Indian, Samisch, Panno Main line |
| 22. O'Kelly vs F J Perez |
| ½-½ | 20 |
1963 |
Memorial J.Capablanca | E81 King's Indian, Samisch |
| 23. O'Kelly vs Ivkov |
| 0-1 | 28 |
1963 |
Beverwijk | E88 King's Indian, Samisch, Orthodox, 7.d5 c6 |
| 24. O'Kelly vs P Dubinin |
| 1-0 | 31 |
1963 |
Ragozin memorial | E88 King's Indian, Samisch, Orthodox, 7.d5 c6 |
| 25. O'Kelly vs Larry Evans |
| ½-½ | 30 |
1964 |
Capablanca mem | E92 King's Indian |