| Garry Kasparov vs Alexander Onischuk | ½-½ | 61 | 1997 | Tilburg Fontys | E13 | Queen's Indian 4.Nc3 | Browse |
| Michael Adams vs Alexander Onischuk | 0-1 | 32 | 1995 | Hoogovens op | C78 | Ruy Lopez 5.O-O | Browse |
| Michael Adams vs Alexander Onischuk | 1-0 | 31 | 1997 | Tilburg Fontys | C55 | Two knights defence (Modern Bishop's Op... | Browse |
| Alexander Onischuk vs Michael Adams | ½-½ | 35 | 1997 | WchT 4th | B14 | Clemenz (Mead's, Basman's or de Klerk's... | Browse |
| Alexander Onischuk vs Michael Adams | ½-½ | 28 | 1997 | Bundesliga 9697 | C88 | Ruy Lopez Closed, anti-Marshall 8.a4 | Browse |
| Alexander Onischuk vs Varuzhan Akobian | 1-0 | 43 | 2005 | American Continental | D18 | Gedult's Opening | Browse |
| Varuzhan Akobian vs Alexander Onischuk | ½-½ | 31 | 2006 | ch-USA GpA | E18 | Queen's Indian Old Main line, 7.Nc3 | Browse |
| Varuzhan Akobian vs Alexander Onischuk | ½-½ | 7 | 2006 | 1st GMA Cup | E32 | Nimzo-Indian Classical variation | Browse |
| Vladimir Akopian vs Alexander Onischuk | 1-0 | 34 | 1996 | Koop Tjuchem | A81 | Reti v Dutch | Browse |
| Alexander Onischuk vs Vladimir Akopian | 1-0 | 27 | 1998 | Elista ol (Men) | A29 | English Opening | Browse |
| Vladimir Akopian vs Alexander Onischuk | ½-½ | 37 | 2004 | 36th Olympiad | C88 | Ruy Lopez Closed, 7...O-O | Browse |
| Alexander Onischuk vs Vladimir Akopian | ½-½ | 26 | 2005 | TCh-RUS | D18 | QGD Slav defence | Browse |
| Evgeny Alekseev vs Alexander Onischuk | ½-½ | 44 | 2007 | 8th Karpov | A28 | English Opening | Browse |
| Zoltan Almasi vs Alexander Onischuk | ½-½ | 32 | 1991 | Wch U16 | C78 | Bird's Opening | Browse |
| Zoltan Almasi vs Alexander Onischuk | ½-½ | 39 | 1995 | Hoogovens op | C78 | Durkin's attack | Browse |
| Zoltan Almasi vs Alexander Onischuk | 1-0 | 41 | 1996 | Biel SKA | C62 | Grob's attack | Browse |
| Zoltan Almasi vs Alexander Onischuk | ½-½ | 22 | 2007 | 23rd ECC Men | C88 | Ruy Lopez Closed, 7...O-O | Browse |
| Alexander Onischuk vs Viswanathan Anand | ½-½ | 16 | 2000 | Open de Corse | E34 | Reti Opening | Browse |
| Alexander Onischuk vs Viswanathan Anand | ½-½ | 24 | 2004 | 36th Olympiad | E15 | Queen's Indian Nimzovich variation (exa... | Browse |
| Alexander Onischuk vs Ulf Andersson | ½-½ | 58 | 1996 | Biel SKA | B82 | Dunst (Sleipner, Heinrichsen) Opening | Browse |
| Alexander Onischuk vs Levon Aronian | ½-½ | 16 | 2001 | Bundesliga 2000-1 | E04 | Catalan Opening | Browse |
| Alexander Onischuk vs Levon Aronian | ½-½ | 20 | 2005 | World Team Ch | E15 | Queen's Indian Nimzovich variation (exa... | Browse |
| Maurice Ashley vs Alexander Onischuk | ½-½ | 51 | 2000 | Corus B | E46 | Nimzo-Indian Reshevsky variation | Browse |
| Alexander Onischuk vs Etienne Bacrot | 0-1 | 63 | 2005 | 6th Karpov | D20 | QGA 3.e4 | Browse |
| Alexander Onischuk vs Etienne Bacrot | ½-½ | 18 | 2005 | Bundesliga 2005-6 | D20 | QGA 3.e4 | Browse |
| Evgeny Bareev vs Alexander Onischuk | 1-0 | 49 | 1998 | Elista ol (Men) | A80 | Dutch | Browse |
| Alexander Onischuk vs Evgeny Bareev | 0-1 | 27 | 2002 | FIDE GP | D18 | QGD Slav defence | Browse |
| Evgeny Bareev vs Alexander Onischuk | 1-0 | 45 | 2002 | FIDE GP | E32 | Dunst (Sleipner, Heinrichsen) Opening | Browse |
| Evgeny Bareev vs Alexander Onischuk | 1-0 | 36 | 2006 | 7th Karpov | E13 | Queen's Indian 4.Nc3 | Browse |
| Evgeny Bareev vs Alexander Onischuk | ½-½ | 51 | 2007 | TCh-RUS | E05 | Catalan Opening | Browse |
Grandmaster Gamesbeta
Onischuk, Alexander
Alexander Onischuk