Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. Efimenko vs A Volokitin |
| 0-1 | 51 | 1997 | UKR-ch U12 | D37 Queen's Gambit Declined |
2. Efimenko vs M Gagunashvili |
| ½-½ | 44 | 1998 | EU-ch U14 | B33 Sicilian |
3. Efimenko vs V Poletaev |
| 1-0 | 41 | 1999 | UKR-ch U18 | B99 Sicilian, Najdorf, 7...Be7 Main line |
4. A Volokitin vs Efimenko |
| ½-½ | 20 | 1999 | UKR-ch U14 | C15 French, Winawer |
5. Efimenko vs M Gagunashvili |
| ½-½ | 28 | 1999 | Artek ol U16 | B33 Sicilian |
6. Efimenko vs M Gagunashvili |
| ½-½ | 22 | 1999 | Wch U14 | B09 Pirc, Austrian Attack |
7. Efimenko vs Navara |
 | ½-½ | 78 | 1999 | Groningen Young Masters | C05 French, Tarrasch |
8. Efimenko vs Stellwagen |
| ½-½ | 25 | 1999 | Groningen Young Masters | C05 French, Tarrasch |
9. Efimenko vs A Volokitin |
| ½-½ | 41 | 1999 | Groningen Young Masters | B46 Sicilian, Taimanov Variation |
10. Efimenko vs Timoshenko |
| ½-½ | 15 | 2000 | 8th Ukrainian Team Championship | C92 Ruy Lopez, Closed |
11. G Nesterov vs Efimenko |
| 0-1 | 43 | 2000 | 8th Ukrainian Team Championship | E61 King's Indian |
12. Efimenko vs T Kononenko |
| 0-1 | 35 | 2000 | 8th Ukrainian Team Championship | C03 French, Tarrasch |
13. Efimenko vs G Arzumanian |
| 0-1 | 40 | 2000 | 8th Ukrainian Team Championship | B32 Sicilian |
14. Efimenko vs A Zubarev |
| 1-0 | 55 | 2000 | 8th Ukrainian Team Championship | B47 Sicilian, Taimanov (Bastrikov) Variation |
15. A Kamenets vs Efimenko |
| 0-1 | 36 | 2000 | 8th Ukrainian Team Championship | E75 King's Indian, Averbakh, Main line |
16. I Romanova vs Efimenko |
| 0-1 | 40 | 2000 | 8th Ukrainian Team Championship | E84 King's Indian, Samisch, Panno Main line |
17. O Chaika vs Efimenko |
| ½-½ | 33 | 2000 | 8th Ukrainian Team Championship | A07 King's Indian Attack |
18. Efimenko vs A Kotsuba |
| 1-0 | 30 | 2000 | 8th Ukrainian Team Championship | B02 Alekhine's Defense |
19. Nakamura vs Efimenko |
| ½-½ | 27 | 2000 | KasparovChess Cadet GP net | C17 French, Winawer, Advance |
20. Efimenko vs Nakamura |
 | 1-0 | 40 | 2000 | KasparovChess Cadet GP net | B99 Sicilian, Najdorf, 7...Be7 Main line |
21. Bu Xiangzhi vs Efimenko |
| 1-0 | 49 | 2000 | KasparovChess Cadet GP net | A45 Queen's Pawn Game |
22. Efimenko vs Bu Xiangzhi |
| 0-1 | 36 | 2000 | KasparovChess Cadet GP net | B62 Sicilian, Richter-Rauzer |
23. E Pinter vs Efimenko |
 | 1-0 | 71 | 2000 | EU-chT U18 | B23 Sicilian, Closed |
24. Efimenko vs G Szabo |
| 1-0 | 35 | 2000 | EU-chT U18 | B85 Sicilian, Scheveningen, Classical |
25. Efimenko vs Bromberger |
| 1-0 | 41 | 2000 | EU-chT U18 | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |