| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. Euwe vs O'Kelly |
 | 1-0 | 35 |
1946 |
Groningen | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 27. O'Kelly vs Stoltz |
| 0-1 | 54 |
1946 |
Staunton, Groningen NED | B81 Sicilian, Scheveningen, Keres Attack |
| 28. O'Kelly vs Najdorf |
| ½-½ | 19 |
1946 |
Groningen | D17 Queen's Gambit Declined Slav |
| 29. O'Kelly vs W Koomen |
| 1-0 | 39 |
1946 |
Beverwijk NED | E20 Nimzo-Indian |
| 30. Szabo vs O'Kelly |
| 1-0 | 16 |
1946 |
Staunton, Groningen NED | D06 Queen's Gambit Declined |
| 31. O'Kelly vs Yanofsky |
| 0-1 | 27 |
1946 |
Barcelona | D46 Queen's Gambit Declined Semi-Slav |
| 32. A De Groot vs O'Kelly |
| 1-0 | 30 |
1946 |
Beverwijk NED | C65 Ruy Lopez, Berlin Defense |
| 33. Guimard vs O'Kelly |
| ½-½ | 40 |
1946 |
Ch Europe (juniors) | D12 Queen's Gambit Declined Slav |
| 34. O'Kelly vs O Bernstein |
| 1-0 | 57 |
1946 |
Staunton, Groningen NED | C71 Ruy Lopez |
| 35. O'Kelly vs Rubinstein |
| 0-1 | 59 |
1946 |
Brussels, Belgium | C64 Ruy Lopez, Classical |
| 36. Najdorf vs O'Kelly |
| ½-½ | 60 |
1946 |
Barcelona | D19 Queen's Gambit Declined Slav, Dutch |
| 37. Stoltz vs O'Kelly |
| ½-½ | 31 |
1946 |
Beverwijk NED | D20 Queen's Gambit Accepted |
| 38. Botvinnik vs O'Kelly |
| 1-0 | 36 |
1946 |
Groningen | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 39. O'Kelly vs M Christoffel |
| 1-0 | 41 |
1946 |
Staunton, Groningen NED | B81 Sicilian, Scheveningen, Keres Attack |
| 40. O'Kelly vs E R Lundin |
| 0-1 | 30 |
1946 |
Ch Europe (juniors) | D45 Queen's Gambit Declined Semi-Slav |
| 41. Boleslavsky vs O'Kelly |
| 1-0 | 30 |
1946 |
Staunton, Groningen NED | C77 Ruy Lopez |
| 42. O'Kelly vs T Van Scheltinga |
| 1-0 | 35 |
1946 |
Beverwijk NED | D45 Queen's Gambit Declined Semi-Slav |
| 43. C Kottnauer vs O'Kelly |
| 0-1 | 24 |
1946 |
Ch Europe (juniors) | E00 Queen's Pawn Game |
| 44. Tsvetkov vs O'Kelly |
| ½-½ | 45 |
1947 |
Zonal | B24 Sicilian, Closed |
| 45. O'Kelly vs P H Pruyt |
| 0-1 | 40 |
1947 |
Beverwijk NED | C78 Ruy Lopez |
| 46. K Plater vs O'Kelly |
| 0-1 | 46 |
1947 |
Zonal | C49 Four Knights |
| 47. O'Kelly vs Euwe |
| 1-0 | 35 |
1947 |
Hilversum | C83 Ruy Lopez, Open |
| 48. O'Kelly vs Szabo |
| 1-0 | 46 |
1947 |
Zonal | E69 King's Indian, Fianchetto, Classical Main line |
| 49. O'Kelly vs Jan Marwitz |
| 1-0 | 23 |
1947 |
Beverwijk NED | D01 Richter-Veresov Attack |
| 50. O'Kelly vs Rossolimo |
| 1-0 | 41 |
1947 |
Zonal | E32 Nimzo-Indian, Classical |
