| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Euwe vs O'Kelly |
 | 1-0 | 35 |
1946 |
Groningen | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 2. Botvinnik vs O'Kelly |
 | 1-0 | 36 |
1946 |
Groningen | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 3. T Van Scheltinga vs O'Kelly |
| ½-½ | 45 |
1947 |
Zonal | E32 Nimzo-Indian, Classical |
| 4. Szabo vs O'Kelly |
| ½-½ | 20 |
1948 |
Mar del Plata (Argentina) | E37 Nimzo-Indian, Classical |
| 5. H Kramer vs O'Kelly |
 | 0-1 | 50 |
1948 |
Beverwijk NED | E36 Nimzo-Indian, Classical |
| 6. B H Wood vs O'Kelly |
| 1-0 | 60 |
1949 |
OLdenburg | E32 Nimzo-Indian, Classical |
| 7. C Kottnauer vs O'Kelly |
| ½-½ | 20 |
1949 |
Trencianske Teplice (Slovakia) | E37 Nimzo-Indian, Classical |
| 8. Ojanen vs O'Kelly |
 | ½-½ | 54 |
1949 |
Tr.Teplice | E41 Nimzo-Indian |
| 9. J Enevoldsen vs O'Kelly |
| ½-½ | 24 |
1949 |
OLdenburg | E46 Nimzo-Indian |
| 10. Stoltz vs O'Kelly |
| 0-1 | 65 |
1950 |
Bled (Slovenia) | E32 Nimzo-Indian, Classical |
| 11. M Castillo vs O'Kelly |
 | 0-1 | 42 |
1950 |
Dubrovnik olm | E26 Nimzo-Indian, Samisch |
| 12. T Van Scheltinga vs O'Kelly |
| ½-½ | 18 |
1950 |
Amsterdam (Netherlands) | E39 Nimzo-Indian, Classical, Pirc Variation |
| 13. F Mastichiadis vs O'Kelly |
| 0-1 | 41 |
1950 |
Dubrovnik olm | E26 Nimzo-Indian, Samisch |
| 14. T Van Scheltinga vs O'Kelly |
 | ½-½ | 18 |
1950 |
Amsterdam | E39 Nimzo-Indian, Classical, Pirc Variation |
| 15. Keres vs O'Kelly |
| ½-½ | 40 |
1952 |
Budapest | E31 Nimzo-Indian, Leningrad, Main line |
| 16. Szabo vs O'Kelly |
| ½-½ | 28 |
1952 |
Budapest | E59 Nimzo-Indian, 4.e3, Main line |
| 17. D Andric vs O'Kelly |
| 0-1 | 39 |
1952 |
Belgrade | E48 Nimzo-Indian, 4.e3 O-O 5.Bd3 d5 |
| 18. J H Donner vs O'Kelly |
| 0-1 | 35 |
1952 |
Beverwijk | E49 Nimzo-Indian, 4.e3, Botvinnik System |
| 19. Keres vs O'Kelly |
| 1-0 | 70 |
1952 |
Budapest (26.03.52) | E30 Nimzo-Indian, Leningrad |
| 20. Tolush vs O'Kelly |
| 0-1 | 68 |
1953 |
Hastings | E59 Nimzo-Indian, 4.e3, Main line |
| 21. G Kluger vs O'Kelly |
| ½-½ | 23 |
1954 |
Bucharest | E59 Nimzo-Indian, 4.e3, Main line |
| 22. A Beni vs O'Kelly |
| 0-1 | 34 |
1954 |
Amsterdam ol (Men) | E26 Nimzo-Indian, Samisch |
| 23. M Cuellar-Gacharna vs O'Kelly |
| 1-0 | 44 |
1954 |
Amsterdam ol (Men) | E41 Nimzo-Indian |
| 24. Korchnoi vs O'Kelly |
| ½-½ | 30 |
1954 |
Bucharest | E25 Nimzo-Indian, Samisch |
| 25. A Neu vs O'Kelly |
| 0-1 | 46 |
1954 |
Amsterdam ol (Men) | E26 Nimzo-Indian, Samisch |