| 3845 | O Brien - Nistri | 1-0 | (chess) | rated |
| 3850 | Hess - O Brien | 1/2-1/2 | (chess) | rated |
| 3854 | O Brien - Weber | 1-0 | (chess) | rated |
| 3857 | Souquiere - O Brien | 0-1 | (chess) | rated |
| 3859 | O Brien - Daligcon | 1-0 | (chess) | rated |
| 3860 | Isojarvi - O Brien | 0-1 | (chess) | rated |
| 7521 | Souquiere - O Brien | 0-1 | (chess) | rated |
| 7526 | O Brien - Moko | 1-0 | (chess) | rated |
| 7530 | Peters - O Brien | 0-1 | (chess) | rated |
| 7533 | O Brien - Willoughby | 1-0 | (chess) | rated |
| 7535 | Poirier - O Brien | 0-1 | (chess) | rated |
| 7537 | O Brien - Stoianov | 1-0 | (chess) | rated |
| 9784 | O Brien - Rouillard | 1-0 | (chess) | rated |
| 9789 | Schafer - O Brien | 0-1 | (chess) | rated |
| 9793 | O Brien - Nagy | 1-0 | (chess) | rated |
| 9796 | Oakley - O Brien | 0-1 | (chess) | rated |
| 9799 | O Brien - Richardson | 1-0 | (chess) | rated |
| 9800 | Fanchini - O Brien | 0-1 | (chess) | rated |
| 9991 | O Brien - Stoyanov | 1-0 | (chess) | rated |
| 9992 | Lorena - O Brien | 0-1 | (chess) | rated |
| 9993 | O Brien - Queiroz | 0-1 | (chess) | rated |
| 9994 | Souquiere - O Brien | 0-1 | (chess) | rated |
| 9995 | O Brien - Schafer | 1-0 | (chess) | rated |
| 9996 | Litzenburger - O Brien | 0-1 | (chess) | rated |
| 12488 | Domingo - O Brien | 1-0 | (chess) | rated |
| 12495 | O Brien - Rotaru | 0-1 | (chess) | rated |
| 12501 | Wyborn - O Brien | 1-0 | (chess) | rated |
| 12506 | O Brien - Miranda | 0-1 | (chess) | rated |
| 12510 | Hoogland - O Brien | 1-0 | (chess) | rated |
| 12513 | O Brien - Baker | 1-0 | (chess) | rated |
| 12515 | Cirulis - O Brien | 0-1 | (chess) | rated |
| 12517 | O Brien - Orden | 1-0 | (chess) | rated |
| 16543 | Cao - O Brien | 0-1 | (chess) | rated |
| 16548 | O Brien - Bester | 1-0 | (chess) | rated |
| 16552 | Block - O Brien | 0-1 | (chess) | rated |
| 16555 | O Brien - Zaichenko | 1-0 | (chess) | rated |
| 16557 | Manuel - O Brien | 0-1 | (chess) | rated |
| 16559 | O Brien - Malpalma | 0-1 | (chess) | rated |
| 18183 | O Brien - Broughman | 1-0 | (chess) | rated |
| 18188 | Cridland - O Brien | 1-0 | (chess) | rated |
| 18192 | O Brien - Nguyen | 1-0 | (chess) | rated |
| 18195 | Haluschka - O Brien | 1-0 | (chess) | rated |
| 18198 | O Brien - Rosado | 0-1 | (chess) | rated |
| 18199 | Richardson - O Brien | 1-0 | (chess) | rated |
| 21437 | O Brien - Konuhov | 0-1 | (chess) | rated |
| 21442 | Morice - O Brien | 0-1 | (chess) | rated |
| 21446 | O Brien - Murittu | 0-1 | (chess) | rated |
| 21449 | Desormes - O Brien | 0-1 | (chess) | rated |
| 21451 | O Brien - Moody | 1-0 | (chess) | rated |
| 21452 | Higuita - O Brien | 0-1 | (chess) | rated |
| 22613 | Ould Ahmed - O Brien | 0-1 | (chess) | rated |
| 22620 | O Brien - Bleker | 0-1 | (chess) | rated |
| 22626 | Pilipchuk - O Brien | 1-0 | (chess) | rated |
| 22631 | O Brien - Hrubaru | 1-0 | (chess) | rated |
| 22635 | Romaniuk - O Brien | 1-0 | (chess) | rated |
| 22638 | O Brien - Pech | 1-0 | (chess) | rated |
| 22640 | Engo - O Brien | 0-1 | (chess) | rated |
| 22642 | O Brien - Melquiades | 1-0 | (chess) | rated |
| 26008 | O Brien - Colarina | 0-1 | (big_chess) | rated |
| 26013 | McNabb - O Brien | 0-1 | (big_chess) | rated |
| 26017 | O Brien - Gramajo | 1-0 | (big_chess) | rated |
| 26020 | Porkolab - O Brien | 1-0 | (big_chess) | rated |
| 26022 | O Brien - Engo | 1-0 | (big_chess) | rated |
| 26023 | Yates - O Brien | 1-0 | (big_chess) | rated |
| 26711 | O Brien - Barradas | 1-0 | (poker_holdem) | rated |
| 26716 | Murray - O Brien | 1-0 | (poker_holdem) | rated |
| 26720 | O Brien - Konuhov | 1-0 | (poker_holdem) | rated |
| 26723 | Koch - O Brien | 1-0 | (poker_holdem) | rated |
| 26725 | O Brien - Noble | 0-1 | (poker_holdem) | rated |
| 26726 | Parmet - O Brien | 1-0 | (poker_holdem) | rated |
| 29187 | O Brien - Collette | 0-1 | (poker_holdem) | rated |
| 29192 | Lehnhoff - O Brien | 1-0 | (poker_holdem) | rated |
| 29197 | O Brien - Parmet | 0-1 | (poker_holdem) | rated |
| 29198 | Boehme - O Brien | 1-0 | (poker_holdem) | rated |
| 29199 | O Brien - Gramajo | 0-1 | (poker_holdem) | rated |
| 29200 | Toutaoui - O Brien | 1-0 | (poker_holdem) | rated |
| 54198 | O Brien - Germanes | 0-1 | (chess) | rated |
| 54205 | Schutte - O Brien | 1-0 | (chess) | rated |
| 54211 | O Brien - Xristostomidis | 1-0 | (chess) | rated |
| 54216 | Endean - O Brien | 1-0 | (chess) | rated |
| 54220 | O Brien - Simashkevitch | 0-1 | (chess) | rated |
| 54223 | Vacenovski - O Brien | 0-1 | (chess) | rated |
| 54226 | O Brien - Geguchadze | 1-0 | (chess) | rated |
| 54227 | Ylonen - O Brien | 1-0 | (chess) | rated |
| 55452 | O Brien - Uzdin | 0-1 | (poker_holdem) | rated |
| 55457 | Bernal Varela - O Brien | 1-0 | (poker_holdem) | rated |
| 55461 | O Brien - Meli | 0-1 | (poker_holdem) | rated |
| 55464 | Boehme - O Brien | 1-0 | (poker_holdem) | rated |
| 55466 | O Brien - Barradas | 1-0 | (poker_holdem) | rated |
| 55467 | Holdt - O Brien | 0-1 | (poker_holdem) | rated |
| 56957 | O Brien - Coimbra | 1-0 | (chess_960) | unrated |
| 56962 | Melquiades - O Brien | 0-1 | (chess_960) | unrated |
| 56966 | O Brien - Pipac | 1-0 | (chess_960) | unrated |
| 56969 | Martinez - O Brien | 0-1 | (chess_960) | unrated |
| 56971 | O Brien - Jerez | 1-0 | (chess_960) | unrated |
| 56972 | Hase - O Brien | 0-1 | (chess_960) | unrated |
| 62321 | Ponce - O Brien | 1-0 | (chess) | rated |
| 62326 | O Brien - van Dijk | 0-1 | (chess) | rated |
| 62330 | Suhardjo - O Brien | 1-0 | (chess) | rated |
| 62333 | O Brien - Moore | 0-1 | (chess) | rated |
| 62335 | Nudo - O Brien | 1-0 | (chess) | rated |
| 62337 | O Brien - Jefferis | 1-0 | (chess) | rated |
| 65501 | O Brien - Higuita | 1-0 | (chess) | rated |
| 65506 | Abubakar - O Brien | 0-1 | (chess) | rated |
| 65510 | O Brien - Cassero | 1-0 | (chess) | rated |
| 65513 | Roe - O Brien | 1-0 | (chess) | rated |
| 65515 | O Brien - Paolillo | 0-1 | (chess) | rated |
| 65516 | Kepinski - O Brien | 0-1 | (chess) | rated |
| 70187 | Hancock - O Brien | 1-0 | (chess) | rated |
| 70192 | O Brien - Ward | 1-0 | (chess) | rated |
| 70196 | Bain - O Brien | 0-1 | (chess) | rated |
| 70199 | O Brien - Boissier | 0-1 | (chess) | rated |
| 70201 | Josse - O Brien | 1-0 | (chess) | rated |
| 70203 | O Brien - Bayer | 1-0 | (chess) | rated |
| 71212 | O Brien - Melquiades | 1-0 | (chess_960) | unrated |
| 71217 | Sternik - O Brien | 1-0 | (chess_960) | unrated |
| 71221 | O Brien - Salinas | 1-0 | (chess_960) | unrated |
| 71224 | Hase - O Brien | 1-0 | (chess_960) | unrated |
| 71226 | O Brien - Toktas | 1-0 | (chess_960) | unrated |
| 71227 | Kehayov - O Brien | 0-1 | (chess_960) | unrated |
| 71559 | O Brien - Sorcinelli | 0-1 | (chess) | unrated |
| 71564 | Trigance - O Brien | 0-1 | (chess) | unrated |
| 71568 | O Brien - Simmelink | 0-1 | (chess) | unrated |
| 71571 | Kruse - O Brien | 1-0 | (chess) | unrated |
| 71573 | O Brien - Shapland | 0-1 | (chess) | unrated |
| 71574 | Tanda - O Brien | 0-1 | (chess) | unrated |
| 72072 | O Brien - Uzzaman | 1-0 | (chess) | rated |
| 72077 | Sobietski - O Brien | 0-1 | (chess) | rated |
| 72081 | O Brien - Krakovsky | 0-1 | (chess) | rated |
| 72084 | Strohmeier - O Brien | 0-1 | (chess) | rated |
| 72086 | O Brien - Conde | 1-0 | (chess) | rated |
| 72087 | Benone - O Brien | 0-1 | (chess) | rated |
| 75324 | O Brien - Legrand | 0-1 | (poker_holdem) | rated |
| 75329 | Hase - O Brien | 1-0 | (poker_holdem) | rated |
| 75333 | O Brien - Dotti Contra | 0-1 | (poker_holdem) | rated |
| 75336 | Fric - O Brien | 0-1 | (poker_holdem) | rated |
| 75338 | O Brien - Krakovsky | 1-0 | (poker_holdem) | rated |
| 75339 | Bain - O Brien | 1-0 | (poker_holdem) | rated |
| 77708 | Shvetsov - O Brien | 1-0 | (chess) | unrated |
| 77713 | O Brien - Sternik | 0-1 | (chess) | unrated |
| 77717 | Carrizo - O Brien | 1-0 | (chess) | unrated |
| 77721 | O Brien - Puzanov | 1-0 | (chess) | unrated |
| 77722 | Benone - O Brien | 0-1 | (chess) | unrated |
| 77723 | O Brien - Dineen | 0-1 | (chess) | unrated |
| 79978 | O Brien - Bernal Varela | 0-1 | (poker_holdem) | rated |
| 79983 | Aahlad - O Brien | 0-1 | (poker_holdem) | rated |
| 79987 | O Brien - Koslowski | 0-1 | (poker_holdem) | rated |
| 79990 | Williams - O Brien | 1-0 | (poker_holdem) | rated |
| 79992 | O Brien - Russi Roman | 0-1 | (poker_holdem) | rated |
| 79993 | Jimenez Alban - O Brien | 1-0 | (poker_holdem) | rated |
| 81971 | O Brien - Lubas | 1-0 | (poker_holdem) | rated |
| 81976 | Desouza - O Brien | 0-1 | (poker_holdem) | rated |
| 81980 | O Brien - Mathakiya | 1-0 | (poker_holdem) | rated |
| 81983 | Puzanov - O Brien | 0-1 | (poker_holdem) | rated |
| 81985 | O Brien - Martinez | 0-1 | (poker_holdem) | rated |
| 81986 | Stras - O Brien | 0-1 | (poker_holdem) | rated |
| 82871 | Cornel - O Brien | 1-0 | (chess) | rated |
| 82878 | O Brien - Vasquez | 0-1 | (chess) | rated |
| 82884 | Riha - O Brien | 1-0 | (chess) | rated |
| 82889 | O Brien - Sorbi | 1/2-1/2 | (chess) | rated |
| 82893 | Ruzin - O Brien | 1-0 | (chess) | rated |
| 82897 | O Brien - Simonnet | 0-1 | (chess) | rated |
| 82898 | Pech - O Brien | 0-1 | (chess) | rated |
| 82899 | O Brien - Dotti Contra | 1-0 | (chess) | rated |
| 83389 | O Brien - Legrand | 0-1 | (poker_holdem) | rated |
| 83396 | Aahlad - O Brien | 1-0 | (poker_holdem) | rated |
| 83402 | O Brien - Staggat | 0-1 | (poker_holdem) | rated |
| 83407 | Dotti Contra - O Brien | 1-0 | (poker_holdem) | rated |
| 83411 | O Brien - Jerez | 1-0 | (poker_holdem) | rated |
| 83414 | Mathakiya - O Brien | 0-1 | (poker_holdem) | rated |
| 83417 | O Brien - Ilic | 0-1 | (poker_holdem) | rated |
| 83418 | Flores - O Brien | 1-0 | (poker_holdem) | rated |
| 85112 | O Brien - Foster | 1-0 | (chess) | rated |
| 85117 | Bhattacharyya - O Brien | 0-1 | (chess) | rated |
| 85121 | O Brien - Dikant | 1/2-1/2 | (chess) | rated |
| 85124 | Faust - O Brien | 1-0 | (chess) | rated |
| 85126 | O Brien - Simonnet | 1-0 | (chess) | rated |
| 85127 | Ramos - O Brien | 0-1 | (chess) | rated |
| 85133 | O Brien - Ramos | 1/2-1/2 | (chess) | unrated |
| 85138 | Hilbert - O Brien | 0-1 | (chess) | unrated |
| 85142 | O Brien - Sternik | 0-1 | (chess) | unrated |
| 85145 | Ellis - O Brien | 1-0 | (chess) | unrated |
| 85147 | O Brien - Foster | 1/2-1/2 | (chess) | unrated |
| 85148 | Zmolil - O Brien | 0-1 | (chess) | unrated |
| 85408 | O Brien - Ocloz | 0-1 | (chess) | rated |
| 85413 | Foster - O Brien | 0-1 | (chess) | rated |
| 85418 | O Brien - Maximov | 1-0 | (chess) | rated |
| 85419 | Cirulis - O Brien | 1-0 | (chess) | rated |
| 85420 | O Brien - Zemlyanov | 1-0 | (chess) | rated |
| 85421 | Knittel - O Brien | 0-1 | (chess) | rated |
| 86272 | O Brien - Cirulis | 0-1 | (chess) | rated |
| 86277 | Ramos - O Brien | 1/2-1/2 | (chess) | rated |
| 86281 | O Brien - Lubas | 1-0 | (chess) | rated |
| 86284 | Hilbert - O Brien | 0-1 | (chess) | rated |
| 86286 | O Brien - Firhansyah | 1-0 | (chess) | rated |
| 86287 | Stevenson - O Brien | 1-0 | (chess) | rated |
| 89544 | O Brien - Cuaycong | 1-0 | (chess) | rated |
| 89549 | Hilbert - O Brien | 1/2-1/2 | (chess) | rated |
| 89553 | O Brien - Bullerkotte | 0-1 | (chess) | rated |
| 89556 | Zemlyanov - O Brien | 0-1 | (chess) | rated |
| 89558 | O Brien - Aragones | 1-0 | (chess) | rated |
| 89559 | Rodriguez Perez - O Brien | 1-0 | (chess) | rated |
| 91569 | O Brien - Nudo | 1/2-1/2 | (chess) | rated |
| 91574 | Ethier - O Brien | 0-1 | (chess) | rated |
| 91578 | O Brien - Ward | 0-1 | (chess) | rated |
| 91581 | Velasco - O Brien | 1-0 | (chess) | rated |
| 91583 | O Brien - Tanda | 1-0 | (chess) | rated |
| 91584 | Rodriguez Perez - O Brien | 1-0 | (chess) | rated |
| 93786 | O Brien - Cirulis | 1-0 | (poker_holdem) | rated |
| 93791 | Laricchiuta - O Brien | 0-1 | (poker_holdem) | rated |
| 93795 | O Brien - Brodie | 0-1 | (poker_holdem) | rated |
| 93798 | Velasco - O Brien | 1-0 | (poker_holdem) | rated |
| 93800 | O Brien - Znamenski | 0-1 | (poker_holdem) | rated |
| 93801 | Puzanov - O Brien | 0-1 | (poker_holdem) | rated |
| 93911 | Trigance - O Brien | 0-1 | (chess) | rated |
| 93916 | O Brien - Vollmer | 1-0 | (chess) | rated |
| 93920 | Drozdovas - O Brien | 1/2-1/2 | (chess) | rated |
| 93924 | O Brien - Mevel | 0-1 | (chess) | rated |
| 93925 | Domingo - O Brien | 1-0 | (chess) | rated |
| 93926 | O Brien - Cesbron | 0-1 | (chess) | rated |