| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 551. M Stean vs O'Kelly |
| ½-½ | 23 |
1973 |
London (England) | C63 Ruy Lopez, Schliemann Defense |
| 552. Hecht vs O'Kelly |
| ½-½ | 22 |
1973 |
London (England) | A06 Reti Opening |
| 553. O'Kelly vs J Eising |
| ½-½ | 26 |
1973 |
Solingen | A40 Queen's Pawn Game |
| 554. Karaklajic vs O'Kelly |
| 0-1 | 41 |
1973 |
London (England) | C63 Ruy Lopez, Schliemann Defense |
| 555. S Webb vs O'Kelly |
| ½-½ | 21 |
1973 |
London (England) | A47 Queen's Indian |
| 556. O'Kelly vs Reshevsky |
| ½-½ | 18 |
1973 |
London (England) | E11 Bogo-Indian Defense |
| 557. O'Kelly vs M Fuller |
| 0-1 | 39 |
1975 |
Malta | E91 King's Indian |
| 558. O'Kelly vs A Zwaig |
 | 0-1 | 43 |
1975 |
Sandefjord (Sweden) | A10 English |
| 559. O'Kelly vs Ghitescu |
| 1-0 | 55 |
1975 |
Sandefjord (Sweden) | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 560. M Fuller vs O'Kelly |
| 1-0 | 34 |
1975 |
GBR-ch Morecombe | C30 King's Gambit Declined |
| 561. O'Kelly vs Palatnik |
| ½-½ | 33 |
1976 |
BRD | A14 English |
| 562. O'Kelly vs Palatnik |
| ½-½ | 22 |
1976 |
BRD | A34 English, Symmetrical |
| 563. E Torre vs O'Kelly |
| 1-0 | 34 |
1978 |
Jakarta | D58 Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst |
| 564. J Sampouw vs O'Kelly |
| 0-1 | 40 |
1978 |
Jakarta | B80 Sicilian, Scheveningen |
| 565. M Sharif vs O'Kelly |
| ½-½ | 26 |
1978 |
Jakarta | C91 Ruy Lopez, Closed |
| 566. O'Kelly vs Chandler |
| 0-1 | 60 |
1978 |
Jakarta | A34 English, Symmetrical |
| 567. O'Kelly vs C Laird |
| 1-0 | 72 |
1978 |
Jakarta | A53 Old Indian |
| 568. O'Kelly vs Quinteros |
| ½-½ | 21 |
1978 |
Jakarta | A61 Benoni |
| 569. K Shirazi vs O'Kelly |
| ½-½ | 41 |
1978 |
Jakarta | B50 Sicilian |
| 570. C Hon vs O'Kelly |
| 1-0 | 35 |
1978 |
Jakarta | C63 Ruy Lopez, Schliemann Defense |
| 571. L Chiong vs O'Kelly |
| ½-½ | 21 |
1978 |
Jakarta | B97 Sicilian, Najdorf |
| 572. O'Kelly vs Miles |
| 0-1 | 25 |
1978 |
ENG | E15 Queen's Indian |
| 573. O'Kelly vs A Bachtiar |
| ½-½ | 30 |
1978 |
Jakarta | A28 English |
| 574. H Suradiradja vs O'Kelly |
| 0-1 | 30 |
1978 |
Jakarta | B97 Sicilian, Najdorf |
| 575. O'Kelly vs R Mascarinas |
| ½-½ | 13 |
1978 |
Jakarta | A34 English, Symmetrical |
