| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Onischuk vs Movsesian |
| ½-½ | 54 |
1995 |
BL2-N 9596 | B41 Sicilian, Kan |
| 2. Onischuk vs Van der Wiel |
| ½-½ | 57 |
1996 |
Wijk-B | B89 Sicilian |
| 3. Onischuk vs V Tukmakov |
| ½-½ | 41 |
1996 |
Biel SKA | B57 Sicilian |
| 4. Onischuk vs Svidler |
| ½-½ | 75 |
1996 |
Groningen | B57 Sicilian |
| 5. Onischuk vs J M Hodgson |
| 1-0 | 45 |
1996 |
It (cat.16) | B76 Sicilian, Dragon, Yugoslav Attack |
| 6. Onischuk vs Ulf Andersson |
| ½-½ | 58 |
1996 |
It (cat.16) | B82 Sicilian, Scheveningen |
| 7. Onischuk vs Van Wely |
| 1-0 | 51 |
1997 |
Hoogovens | B82 Sicilian, Scheveningen |
| 8. Onischuk vs Svidler |
 | 0-1 | 38 |
1997 |
Fontys | B92 Sicilian, Najdorf, Opocensky Variation |
| 9. Onischuk vs Leko |
| ½-½ | 59 |
1997 |
Fontys | B83 Sicilian |
| 10. Onischuk vs Lautier |
 | 1-0 | 63 |
1997 |
Fontys | B92 Sicilian, Najdorf, Opocensky Variation |
| 11. Onischuk vs Yermolinsky |
| 1-0 | 24 |
1997 |
Hoogovens, Wijk aan Zee NED | B57 Sicilian |
| 12. Onischuk vs Jiangchuan |
| 0-1 | 65 |
1998 |
Elista olm | B33 Sicilian |
| 13. Onischuk vs M Brodsky |
| 1-0 | 60 |
1998 |
Donetzk zt | B49 Sicilian, Taimanov Variation |
| 14. Onischuk vs Salov |
| 0-1 | 65 |
1998 |
President's Cup | B48 Sicilian, Taimanov Variation |
| 15. Onischuk vs Votava |
| 1-0 | 37 |
1998 |
Bundesliga -9 | B40 Sicilian |
| 16. Onischuk vs Krasenkow |
| 1-0 | 57 |
1999 |
Bundesliga 1998/99, Germany | B33 Sicilian |
| 17. Onischuk vs Epishin |
| ½-½ | 48 |
1999 |
Bundesliga 1998/99, Germany | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 18. Onischuk vs Filippov |
| ½-½ | 38 |
1999 |
EU-chT (Men) | B45 Sicilian, Taimanov |
| 19. Onischuk vs Smirin |
| ½-½ | 16 |
1999 |
EU-chT (Men) | B41 Sicilian, Kan |
| 20. Onischuk vs Bologan |
| 0-1 | 20 |
2001 |
Karpov It | B90 Sicilian, Najdorf |
| 21. Onischuk vs G Gibson |
| 1-0 | 33 |
2004 |
US Open | B31 Sicilian, Rossolimo Variation |
| 22. Onischuk vs Fishbein |
| 0-1 | 42 |
2004 |
Chessmaster US Championships 2005 | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 23. Onischuk vs T Gossell |
| 1-0 | 29 |
2005 |
24th OCF NAO-Oklahoma | B29 Sicilian, Nimzovich-Rubinstein |
| 24. Onischuk vs Kudrin |
| ½-½ | 57 |
2008 |
US Championship | B22 Sicilian, Alapin |