| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. T O'Donnell vs Jean-Philippe Grondin |
| ½-½ | 68 |
1994 |
Ch. Invitation | C57 Two Knights |
| 27. T O'Donnell vs Remlinger |
| 1-0 | 50 |
1994 |
San Mateo | C07 French, Tarrasch |
| 28. T O'Donnell vs L Day |
| ½-½ | 12 |
1994 |
Toronto Open | B08 Pirc, Classical |
| 29. B Izumikawa vs T O'Donnell |
| ½-½ | 35 |
1994 |
San Mateo | D45 Queen's Gambit Declined Semi-Slav |
| 30. M Leski vs T O'Donnell |
| ½-½ | 16 |
1994 |
San Mateo | A07 King's Indian Attack |
| 31. T O'Donnell vs Shaked |
| ½-½ | 39 |
1994 |
San Mateo | B40 Sicilian |
| 32. Hebert vs T O'Donnell |
| ½-½ | 36 |
1994 |
Quebec op | D47 Queen's Gambit Declined Semi-Slav |
| 33. T O'Donnell vs T Brownscombe |
| 0-1 | 49 |
1994 |
San Mateo | B22 Sicilian, Alapin |
| 34. T O'Donnell vs L Busquets |
| 1-0 | 28 |
1994 |
San Mateo | B22 Sicilian, Alapin |
| 35. B Kreiman vs T O'Donnell |
| ½-½ | 14 |
1995 |
Marshall CC int fin | B62 Sicilian, Richter-Rauzer |
| 36. P Moulin vs T O'Donnell |
| 0-1 | 46 |
1995 |
Marshall CC int fin | B58 Sicilian |
| 37. L Day vs T O'Donnell |
| 1-0 | 31 |
1998 |
Toronto Canada Day | B21 Sicilian, 2.f4 and 2.d4 |
| 38. R Ziatdinov vs T O'Donnell |
| ½-½ | 21 |
1999 |
Koltanowski Team Match | C60 Ruy Lopez |
| 39. A Mayo vs T O'Donnell |
 | 1-0 | 25 |
2000 |
Charlottetown FIDE Invitational | B23 Sicilian, Closed |
| 40. Lorne Yee vs T O'Donnell |
| 0-1 | 31 |
2001 |
Canadian Open | A13 English |
| 41. I Bluvshtein vs T O'Donnell |
| ½-½ | 34 |
2001 |
Canadian Open | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 42. T O'Donnell vs Christiansen |
| ½-½ | 51 |
2001 |
Canadian Open | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 43. T O'Donnell vs W Taylor |
| 1-0 | 40 |
2001 |
Canadian Open | B05 Alekhine's Defense, Modern |
| 44. T O'Donnell vs V Gaspariants |
| 1-0 | 37 |
2001 |
Canadian Open | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 45. T O'Donnell vs R Golts |
| 1-0 | 67 |
2001 |
Canadian Open | C07 French, Tarrasch |
| 46. M Mazock vs T O'Donnell |
| 0-1 | 46 |
2001 |
Canadian Open | D45 Queen's Gambit Declined Semi-Slav |
| 47. Miles vs T O'Donnell |
 | 1-0 | 53 |
2001 |
Canadian Open | D00 Queen's Pawn Game |
| 48. F Kleist vs T O'Donnell |
| ½-½ | 34 |
2001 |
Canadian Open | D30 Queen's Gambit Declined |
| 49. T O'Donnell vs Short |
 | 0-1 | 35 |
2007 |
Canadian Open | E32 Nimzo-Indian, Classical |
| 50. T O'Donnell vs J Upper |
| 1-0 | 32 |
2007 |
Canadian Open | C05 French, Tarrasch |