| 51048 | Soszynski - O Brien | 1-0 | 29th of April 2011 16:53:52 | (chess) | rated |
| 51053 | O Brien - Riha | 0-1 | 27th of April 2011 16:43:45 | (chess) | rated |
| 51057 | Simmelink - O Brien | 1-0 | 30th of April 2011 04:54:00 | (chess) | rated |
| 51061 | O Brien - Orlov | 0-1 | 13th of March 2011 06:00:01 | (chess) | rated |
| 51062 | Tommasi - O Brien | 1-0 | 17th of May 2011 06:13:50 | (chess) | rated |
| 51063 | O Brien - Bernal Varela | 0-1 | 7th of May 2011 17:37:29 | (chess) | rated |
| 51371 | O Brien - Josse | 1-0 | 7th of April 2011 02:58:16 | (chess) | rated |
| 51372 | Cookson - O Brien | 1-0 | 21st of April 2011 04:06:29 | (chess) | rated |
| 51373 | O Brien - James | 0-1 | 30th of April 2011 04:54:00 | (chess) | rated |
| 51374 | Lim - O Brien | 1-0 | 27th of March 2011 04:39:03 | (chess) | rated |
| 51375 | O Brien - Schutte | 0-1 | 4th of April 2011 14:40:53 | (chess) | rated |
| 51376 | Helmer - O Brien | 1-0 | 27th of March 2011 00:52:08 | (chess) | rated |
| 51445 | Sengupta - O Brien | 1/2-1/2 | 3rd of January 2011 18:36:51 | (chess) | rated |
| 51565 | O Brien - Nucci | 0-1 | 19th of May 2011 06:19:06 | (chess) | rated |
| 51566 | Nenciulescu - O Brien | 1-0 | 21st of May 2011 18:30:28 | (chess) | rated |
| 51567 | O Brien - De Waele | 0-1 | 12th of May 2011 06:02:02 | (chess) | rated |
| 51568 | Mamrukov - O Brien | 1-0 | 12th of May 2011 18:01:32 | (chess) | rated |
| 51569 | O Brien - Hamby | 0-1 | 17th of May 2011 18:12:57 | (chess) | rated |
| 51570 | Riha - O Brien | 1-0 | 11th of May 2011 06:00:07 | (chess) | rated |
| 51586 | Flores - O Brien | 1-0 | 8th of April 2011 15:10:49 | (chess) | rated |
| 51592 | O Brien - Martinez | 0-1 | 30th of March 2011 14:06:56 | (chess) | rated |
| 51593 | Kirali - O Brien | 1-0 | 21st of April 2011 04:06:29 | (chess) | rated |
| 51594 | O Brien - Mamrukov | 0-1 | 4th of April 2011 02:39:55 | (chess) | rated |
| 51595 | James - O Brien | 1-0 | 17th of April 2011 03:59:06 | (chess) | rated |
| 51596 | O Brien - Domingo | 0-1 | 17th of April 2011 03:59:06 | (chess) | rated |
| 51741 | Braibant - O Brien | 0-1 | 10th of January 2011 10:46:17 | (chess) | rated |
| 52138 | O Brien - Aigner | 0-1 | 18th of April 2011 16:02:31 | (chess) | unrated |
| 52143 | Riha - O Brien | 1-0 | 26th of May 2011 18:46:18 | (chess) | unrated |
| 52148 | O Brien - Flores | 0-1 | 2nd of June 2011 07:07:58 | (chess) | unrated |
| 52149 | Orden - O Brien | 1-0 | 1st of June 2011 07:07:03 | (chess) | unrated |
| 52150 | O Brien - Pech | 0-1 | 5th of May 2011 17:34:52 | (chess) | unrated |
| 52151 | Vilnius - O Brien | 0-1 | 16th of April 2011 15:58:21 | (chess) | unrated |
| 54517 | Kokoryukin - O Brien | 1-0 | 20th of May 2011 06:27:33 | (chess) | rated |
| 54525 | O Brien - De Waele | 0-1 | 18th of May 2011 18:18:15 | (chess) | rated |
| 54526 | Valle - O Brien | 1-0 | 17th of May 2011 18:12:57 | (chess) | rated |
| 54527 | O Brien - Legrand | 0-1 | 28th of May 2011 18:51:33 | (chess) | rated |
| 54528 | Hasyn - O Brien | 1-0 | 26th of May 2011 06:44:44 | (chess) | rated |
| 54529 | O Brien - Matisz | 0-1 | 12th of June 2011 07:35:55 | (chess) | rated |
| 54530 | Adorjan - O Brien | 1-0 | 25th of May 2011 06:45:56 | (chess) | rated |
| 54531 | O Brien - Pechova | 0-1 | 27th of May 2011 06:46:19 | (chess) | rated |
| 62195 | Kasabasic - O Brien | 1-0 | 7th of February 2012 01:00:57 | (chess) | rated |
| 62200 | O Brien - Kasznia | 0-1 | 7th of February 2012 01:01:07 | (chess) | rated |
| 62204 | Maceda - O Brien | 1-0 | 7th of February 2012 01:00:47 | (chess) | rated |
| 62207 | O Brien - Gorny | 0-1 | 7th of February 2012 01:01:22 | (chess) | rated |
| 62209 | Cridland - O Brien | 1-0 | 7th of February 2012 01:01:30 | (chess) | rated |
| 62211 | O Brien - Bromo | 0-1 | 6th of February 2012 19:07:23 | (chess) | rated |
| 66671 | Lundin - O Brien | 0-1 | 31st of July 2012 12:25:28 | (chess) | rated |
| 67618 | Bizet - O Brien | 1-0 | 8th of November 2012 10:24:04 | (chess) | rated |
| 67624 | O Brien - Arteau | 0-1 | 4th of November 2012 22:14:13 | (chess) | rated |
| 67625 | Boissier - O Brien | 1-0 | 3rd of November 2012 10:10:20 | (chess) | rated |
| 67626 | O Brien - Piecuch | 1-0 | 11th of November 2012 17:49:21 | (chess) | rated |
| 67627 | Dikant - O Brien | 1-0 | 2nd of November 2012 10:04:40 | (chess) | rated |
| 67628 | O Brien - von Buttlar | 0-1 | 5th of November 2012 22:20:00 | (chess) | rated |
| 69691 | Robertsi - O Brien | 0-1 | 4th of January 2013 23:33:31 | (chess) | rated |
| 69697 | O Brien - Clark | 0-1 | 4th of January 2013 23:33:31 | (chess) | rated |
| 69698 | Krakovsky - O Brien | 0-1 | 4th of January 2013 23:33:31 | (chess) | rated |
| 69699 | O Brien - Hancock | 0-1 | 4th of January 2013 23:33:31 | (chess) | rated |
| 69700 | Zak - O Brien | 1-0 | 5th of January 2013 11:34:53 | (chess) | rated |
| 69701 | O Brien - Dautovic | 0-1 | 4th of January 2013 23:33:31 | (chess) | rated |
| 71316 | O Brien - Lehnhoff | 0-1 | 14th of March 2013 05:40:07 | (big_chess) | rated |
| 71319 | Perez - O Brien | 0-1 | 14th of March 2013 05:40:07 | (big_chess) | rated |
| 71321 | O Brien - Gounant | 0-1 | 14th of March 2013 05:40:07 | (big_chess) | rated |
| 71322 | Archip - O Brien | 1-0 | 14th of March 2013 05:40:07 | (big_chess) | rated |
| 83053 | Llull - O Brien | 1-0 | 6th of December 2014 00:53:30 | (chess) | rated |
| 83060 | O Brien - Permykov | 0-1 | 8th of December 2014 01:20:01 | (chess) | rated |
| 83066 | Lindroth - O Brien | 1-0 | 6th of December 2014 12:59:10 | (chess) | rated |
| 83071 | O Brien - Munoz Portugal | 0-1 | 5th of December 2014 12:54:21 | (chess) | rated |
| 83075 | Waciak - O Brien | 1-0 | 8th of December 2014 01:20:01 | (chess) | rated |
| 83078 | O Brien - Ropokis | 0-1 | 8th of December 2014 01:20:01 | (chess) | rated |
| 83080 | Galanter - O Brien | 1-0 | 6th of December 2014 00:53:30 | (chess) | rated |
| 83082 | O Brien - Mach | 0-1 | 10th of December 2014 13:19:16 | (chess) | rated |
| 97148 | O Brien - Permykov | 0-1 | 10th of April 2017 11:14:21 | (chess) | rated |
| 97154 | Gray - O Brien | 1-0 | 8th of April 2017 11:02:55 | (chess) | rated |
| 97159 | O Brien - Satonnet | 0-1 | 6th of April 2017 10:37:06 | (chess) | rated |
| 97163 | Gorny - O Brien | 1-0 | 12th of April 2017 23:29:43 | (chess) | rated |
| 97166 | O Brien - Lipsits | 0-1 | 11th of April 2017 11:15:13 | (chess) | rated |
| 97168 | Trigance - O Brien | 1-0 | 10th of April 2017 11:14:21 | (chess) | rated |
| 97170 | O Brien - Niglio | 0-1 | 9th of April 2017 11:03:56 | (chess) | rated |