| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. O'Kelly vs Yanofsky |
 | ½-½ | 54 |
1946 |
Ch Europe (juniors) | E36 Nimzo-Indian, Classical |
| 2. O'Kelly vs W Koomen |
 | 1-0 | 39 |
1946 |
Beverwijk NED | E20 Nimzo-Indian |
| 3. O'Kelly vs Pachman |
| ½-½ | 42 |
1947 |
Zonal | E32 Nimzo-Indian, Classical |
| 4. O'Kelly vs Rossolimo |
 | 1-0 | 41 |
1947 |
Zonal | E32 Nimzo-Indian, Classical |
| 5. O'Kelly vs E Foerder |
| 1-0 | 67 |
1947 |
Hilversum (Netherlands) | E37 Nimzo-Indian, Classical |
| 6. O'Kelly vs Najdorf |
| ½-½ | 41 |
1948 |
Buenos Aires | E33 Nimzo-Indian, Classical |
| 7. O'Kelly vs Pachman |
| ½-½ | 14 |
1949 |
Trencianske Teplice (Slovakia) | E39 Nimzo-Indian, Classical, Pirc Variation |
| 8. O'Kelly vs Szabo |
| ½-½ | 41 |
1949 |
Tr.Teplice | E21 Nimzo-Indian, Three Knights |
| 9. O'Kelly vs Kieninger |
| 0-1 | 66 |
1949 |
OLdenburg | E33 Nimzo-Indian, Classical |
| 10. O'Kelly vs Samisch |
| 1-0 | 33 |
1949 |
OLdenburg | E21 Nimzo-Indian, Three Knights |
| 11. O'Kelly vs A Beni |
| ½-½ | 20 |
1950 |
Dubrovnik olm | E39 Nimzo-Indian, Classical, Pirc Variation |
| 12. O'Kelly vs A Matanovic |
| ½-½ | 20 |
1950 |
Bled it | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 13. O'Kelly vs A Matanovic |
| 1-0 | 57 |
1953 |
Hastings | E59 Nimzo-Indian, 4.e3, Main line |
| 14. O'Kelly vs Szabo |
| 0-1 | 45 |
1954 |
Olympiad | E34 Nimzo-Indian, Classical, Noa Variation |
| 15. O'Kelly vs F Olafsson |
| ½-½ | 33 |
1956 |
Olympiad | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 16. O'Kelly vs J Penrose |
| ½-½ | 88 |
1956 |
Hastings 56/57 | E59 Nimzo-Indian, 4.e3, Main line |
| 17. O'Kelly vs D Horseman |
| 1-0 | 29 |
1956 |
Hastings 56/57 | E43 Nimzo-Indian, Fischer Variation |
| 18. O'Kelly vs C B Van den Berg |
| ½-½ | 51 |
1959 |
Hoogovens | E41 Nimzo-Indian |
| 19. O'Kelly vs E Secchi |
| 1-0 | 42 |
1959 |
corr-3 | E59 Nimzo-Indian, 4.e3, Main line |
| 20. O'Kelly vs C B Van den Berg |
| 1-0 | 33 |
1963 |
Hoogovens | E20 Nimzo-Indian |
| 21. O'Kelly vs G Borisenko |
| ½-½ | 25 |
1963 |
Ragosin mem corr6366 | E40 Nimzo-Indian, 4.e3 |
| 22. O'Kelly vs J Van Den Berg |
| 1-0 | 33 |
1963 |
Beverwijk (Netherlands) | E20 Nimzo-Indian |
| 23. O'Kelly vs R Ortega |
| 1-0 | 29 |
1964 |
Capablanca mem | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 24. O'Kelly vs J H Donner |
| ½-½ | 30 |
1964 |
Capablanca mem | E59 Nimzo-Indian, 4.e3, Main line |
| 25. O'Kelly vs C Bielicki |
| ½-½ | 36 |
1964 |
Capablanca mem | E20 Nimzo-Indian |