| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Onischuk vs A Kovacevic |
 | 1-0 | 12 |
1991 |
It (open) | A27 English, Three Knights System |
| 2. T Ludwikow vs Onischuk |
| 0-1 | 23 |
1992 |
Hallsberg jr | C32 King's Gambit Declined, Falkbeer Counter Gambit |
| 3. Onischuk vs B Lengyel |
| 1-0 | 35 |
1993 |
Budapest FS07 GM | A28 English |
| 4. Onischuk vs T Fogarasi |
| 1-0 | 75 |
1993 |
Budapest FS07 GM | A16 English |
| 5. G Vescovi vs Onischuk |
| 0-1 | 28 |
1993 |
Budapest (Hungary) | C29 Vienna Gambit |
| 6. N Davies vs Onischuk |
| 0-1 | 55 |
1993 |
Budapest (Hungary) | E00 Queen's Pawn Game |
| 7. Onischuk vs S Smagin |
| 1-0 | 43 |
1993 |
Dortmund op-A | D35 Queen's Gambit Declined |
| 8. D Rogozenko vs Onischuk |
| 0-1 | 37 |
1993 |
EU-ch U18 | E20 Nimzo-Indian |
| 9. Onischuk vs Vyzmanavin |
| 1-0 | 61 |
1994 |
Alushta Cat.14 | A87 Dutch, Leningrad, Main Variation |
| 10. Onischuk vs Hertneck |
| 1-0 | 102 |
1994 |
Moscow ol (Men) | A31 English, Symmetrical, Benoni Formation |
| 11. V Fedchenko vs Onischuk |
| 0-1 | 43 |
1994 |
Ch Ukraine (team) | C29 Vienna Gambit |
| 12. Onischuk vs V Moskalenko |
| 1-0 | 42 |
1994 |
Alushta Cat.14 | A84 Dutch |
| 13. Dreev vs Onischuk |
| 0-1 | 62 |
1994 |
Alushta Cat.14 | D47 Queen's Gambit Declined Semi-Slav |
| 14. D Tebb vs Onischuk |
| 0-1 | 53 |
1995 |
It (open) | C26 Vienna |
| 15. Adams vs Onischuk |
| 0-1 | 31 |
1995 |
Wijk aan Zee op 63/296 | C78 Ruy Lopez |
| 16. Onischuk vs Pavasovic |
| 1-0 | 41 |
1995 |
Wch U20 | C42 Petrov Defense |
| 17. D Poldauf vs Onischuk |
| 0-1 | 32 |
1995 |
Hastings Masters | A10 English |
| 18. Kupreichik vs Onischuk |
| 0-1 | 41 |
1995 |
Groningen op | C62 Ruy Lopez, Old Steinitz Defense |
| 19. Onischuk vs J M Hodgson |
| 1-0 | 45 |
1996 |
Groningen | B76 Sicilian, Dragon, Yugoslav Attack |
| 20. Onischuk vs Miles |
| 1-0 | 25 |
1996 |
Hoogovens (B) | B00 Uncommon King's Pawn Opening |
| 21. R Lau vs Onischuk |
| 0-1 | 29 |
1996 |
Vienna op | C78 Ruy Lopez |
| 22. Onischuk vs Miles |
| 1-0 | 47 |
1996 |
It (cat.16) | C67 Ruy Lopez |
| 23. Onischuk vs Lautier |
| 1-0 | 63 |
1997 |
Tilburg Fontys | B92 Sicilian, Najdorf, Opocensky Variation |
| 24. Short vs Onischuk |
| 0-1 | 36 |
1997 |
Wijk aan Zee Hoogovens | C78 Ruy Lopez |
| 25. Onischuk vs N Stanec |
| 1-0 | 60 |
1997 |
Cup European Club | B89 Sicilian |
