| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. A Matikozian vs O Zaikov |
| 1-0 | 35 |
2004 |
US Open | B30 Sicilian |
| 2. Sadvakasov vs O Zaikov |
| 1-0 | 24 |
2006 |
34th World Open | B90 Sicilian, Najdorf |
| 3. R Hungaski vs O Zaikov |
| ½-½ | 29 |
2006 |
34th World Open | B82 Sicilian, Scheveningen |
| 4. O Zaikov vs M Panchanathan |
| ½-½ | 45 |
2006 |
34th World Open | E12 Queen's Indian |
| 5. O Zaikov vs C Onyekwere |
 | 0-1 | 42 |
2006 |
34th World Open | D11 Queen's Gambit Declined Slav |
| 6. J Torres Santiago vs O Zaikov |
| 0-1 | 21 |
2006 |
34th World Open | B86 Sicilian, Fischer-Sozin Attack |
| 7. B Finegold vs O Zaikov |
| 1-0 | 39 |
2006 |
34th World Open | A57 Benko Gambit |
| 8. R Kaufman vs O Zaikov |
| 0-1 | 31 |
2006 |
US Chess League | A57 Benko Gambit |
| 9. O Zaikov vs C Williams |
| 1-0 | 36 |
2006 |
34th World Open | E12 Queen's Indian |
| 10. O Zaikov vs M Molner |
| 1-0 | 54 |
2006 |
US Chess League | A00 Uncommon Opening |
| 11. R Zimmer vs O Zaikov |
| 0-1 | 51 |
2008 |
US Chess League | A57 Benko Gambit |
| 12. O Zaikov vs J Sammour Hasbun |
| ½-½ | 35 |
2008 |
United States Chess League | D27 Queen's Gambit Accepted, Classical |
| 13. J Sarkar vs O Zaikov |
| 0-1 | 57 |
2008 |
United States Chess League | A58 Benko Gambit |
| 14. O Zaikov vs M Molner |
| 1-0 | 37 |
2008 |
US Chess League | A58 Benko Gambit |
| 15. O Zaikov vs Fedorowicz |
| ½-½ | 37 |
2008 |
United States Chess League | E12 Queen's Indian |
| 16. O Zaikov vs R Zimmer |
| 0-1 | 43 |
2008 |
United States Chess League | D07 Queen's Gambit Declined, Chigorin Defense |
| 17. O Zaikov vs E Vovsha |
| 0-1 | 38 |
2008 |
US Chess League | B09 Pirc, Austrian Attack |
| 18. T Bartell vs O Zaikov |
| 1-0 | 37 |
2008 |
United States Chess League | E63 King's Indian, Fianchetto, Panno Variation |
| 19. O Zaikov vs D Shmelov |
| ½-½ | 40 |
2008 |
United States Chess League | A70 Benoni, Classical with 7.Nf3 |
| 20. Lenderman vs O Zaikov |
| 1-0 | 51 |
2008 |
United States Chess League | B22 Sicilian, Alapin |
| 21. T Andrews vs O Zaikov |
| 0-1 | 32 |
2008 |
United States Chess League | B90 Sicilian, Najdorf |
| 22. O Zaikov vs M Ginsburg |
 | 1-0 | 33 |
2008 |
United States Chess League | E11 Bogo-Indian Defense |
| 23. O Zaikov vs I Krush |
| 1-0 | 42 |
2009 |
USCL | A13 English |