| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. M Ioannidis vs E O'Hare |
| 0-1 | 32 | 1962 | Varna Olympiad Final-C | D02 Queen's Pawn Game |
| 27. E O'Hare vs A Paidousis |
| 1-0 | 30 | 1962 | Varna Olympiad Final-C | B77 Sicilian, Dragon, Yugoslav Attack |
| 28. Erny Leners vs E O'Hare |
| ½-½ | 22 | 1962 | Varna Olympiad Final-C | B72 Sicilian, Dragon |
| 29. D Parniani vs E O'Hare |
| ½-½ | 36 | 1962 | Varna Olympiad Final-C | B77 Sicilian, Dragon, Yugoslav Attack |
| 30. E O'Hare vs N Rabell-Mendez |
| 1-0 | 41 | 1962 | Varna Olympiad Final-C | C07 French, Tarrasch |
| 31. E Guthi vs E O'Hare |
| 1-0 | 19 | 1964 | Tel Aviv Olympiad qual-3 | B70 Sicilian, Dragon Variation |
| 32. G Mazzoni vs E O'Hare |
| 1-0 | 28 | 1964 | Tel Aviv Olympiad qual-3 | B76 Sicilian, Dragon, Yugoslav Attack |
| 33. E O'Hare vs Z Nilsson |
| 0-1 | 14 | 1964 | Tel Aviv Olympiad qual-3 | B28 Sicilian, O'Kelly Variation |
| 34. E O'Hare vs I Bilek |
| 0-1 | 36 | 1964 | Tel Aviv Olympiad qual-3 | B56 Sicilian |
| 35. E O'Hare vs M Solmundarson |
| 0-1 | 60 | 1964 | Tel Aviv Olympiad Final-C | B11 Caro-Kann, Two Knights, 3...Bg4 |
| 36. E O'Hare vs Mansoor Jelveh |
| 0-1 | 51 | 1964 | Tel Aviv Olympiad Final-C | B27 Sicilian |
| 37. G Shekhar vs E O'Hare |
| 0-1 | 28 | 1964 | Tel Aviv Olympiad Final-C | B72 Sicilian, Dragon |
| 38. E O'Hare vs L Vizantiadis |
| 0-1 | 105 | 1964 | Tel Aviv Olympiad Final-C | B46 Sicilian, Taimanov Variation |
| 39. E O'Hare vs P Dillon |
 | 0-1 | 16 | 1966 | IRL-ch | D32 Queen's Gambit Declined, Tarrasch |
| 40. E O'Hare vs P Dillon |
| 0-1 | 24 | 1967 | IRL-ch | C04 French, Tarrasch, Guimard Main line |
| 41. E O'Hare vs D Parr |
| 0-1 | 33 | 1968 | Churchill Memorial Open | B92 Sicilian, Najdorf, Opocensky Variation |
Kibitzing
