| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Efimenko vs G Timoshenko |
| ½-½ | 15 |
2000 |
Ukrainian Team ch | C92 Ruy Lopez, Closed |
| 2. Efimenko vs A Korobov |
| ½-½ | 9 |
2001 |
2nd Governor's Cup | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 3. Efimenko vs R Rabiega |
| 1-0 | 44 |
2001 |
2nd IECC | C64 Ruy Lopez, Classical |
| 4. Efimenko vs V Komliakov |
| 1-0 | 46 |
2001 |
2nd Governor's Cup | C67 Ruy Lopez |
| 5. Efimenko vs M Cornette |
| 1-0 | 24 |
2001 |
WYB16 | C67 Ruy Lopez |
| 6. Efimenko vs Romanishin |
| ½-½ | 47 |
2001 |
ch-UKR | C87 Ruy Lopez |
| 7. Efimenko vs V Mikhalevski |
| ½-½ | 32 |
2001 |
MTO | C80 Ruy Lopez, Open |
| 8. Efimenko vs Onischuk |
| 0-1 | 64 |
2002 |
European Club Cup | C91 Ruy Lopez, Closed |
| 9. Efimenko vs Kaidanov |
| 0-1 | 39 |
2003 |
Aeroflot Open | C80 Ruy Lopez, Open |
| 10. Efimenko vs Z Almasi |
| 0-1 | 18 |
2003 |
European Clubs Cup (Men) | C88 Ruy Lopez |
| 11. Efimenko vs E Dervishi |
| 0-1 | 70 |
2003 |
4th IECC | C92 Ruy Lopez, Closed |
| 12. Efimenko vs B Socko |
 | 0-1 | 53 |
2003 |
EU-chT (Men) | C95 Ruy Lopez, Closed, Breyer |
| 13. Efimenko vs A Lastin |
| ½-½ | 16 |
2003 |
Aeroflot Open | C84 Ruy Lopez, Closed |
| 14. Efimenko vs V Rogovski |
| ½-½ | 42 |
2004 |
73rd Ukrainian Championship | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 15. Efimenko vs Kaidanov |
| 1-0 | 44 |
2004 |
3rd Aeroflot Festival | C78 Ruy Lopez |
| 16. Efimenko vs Beliavsky |
| 1-0 | 36 |
2005 |
Aeroflot Open | C88 Ruy Lopez |
| 17. Efimenko vs M Brodsky |
| ½-½ | 21 |
2005 |
RUS-chT | C99 Ruy Lopez, Closed, Chigorin, 12...cd |
| 18. Efimenko vs Cherniaev |
| 1-0 | 32 |
2005 |
2nd Coventry Chess International | C65 Ruy Lopez, Berlin Defense |
| 19. Efimenko vs Kiril Georgiev |
| 1-0 | 66 |
2005 |
Gibraltar Masters | C65 Ruy Lopez, Berlin Defense |
| 20. Efimenko vs Shirov |
| ½-½ | 28 |
2005 |
Polish Championship | C65 Ruy Lopez, Berlin Defense |
| 21. Efimenko vs Vallejo-Pons |
| 0-1 | 37 |
2005 |
FIDE World Cup | C65 Ruy Lopez, Berlin Defense |
| 22. Efimenko vs A Fejzullahu |
| 1-0 | 52 |
2005 |
21st European Club Cup | C96 Ruy Lopez, Closed |
| 23. Efimenko vs I Sokolov |
| ½-½ | 34 |
2005 |
Bundesliga | C80 Ruy Lopez, Open |
| 24. Efimenko vs Aronian |
| ½-½ | 22 |
2005 |
Aeroflot Open | C88 Ruy Lopez |
| 25. Efimenko vs S Fedorchuk |
| 1-0 | 60 |
2005 |
7th Dubai Open Chess Championship | C78 Ruy Lopez |
