| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Lutikov vs O Dementiev |
| 1-0 | 64 |
1968 |
URS-ch Armed Forces | D30 Queen's Gambit Declined |
| 2. O Dementiev vs Karpov |
 | 1-0 | 33 |
1970 |
USSR Championship | B03 Alekhine's Defense |
| 3. Doroshkievich vs O Dementiev |
| ½-½ | 27 |
1970 |
USSR Championship | A07 King's Indian Attack |
| 4. O Moiseev vs O Dementiev |
| ½-½ | 27 |
1970 |
USSR Championship | D59 Queen's Gambit Declined, Tartakower |
| 5. O Dementiev vs Averbakh |
| 1-0 | 45 |
1970 |
USSR Championship | B60 Sicilian, Richter-Rauzer |
| 6. O Dementiev vs Gipslis |
| ½-½ | 16 |
1970 |
USSR Championship | B04 Alekhine's Defense, Modern |
| 7. O Dementiev vs Vaganian |
| ½-½ | 21 |
1970 |
USSR Championship | D45 Queen's Gambit Declined Semi-Slav |
| 8. Savon vs O Dementiev |
| 1-0 | 42 |
1970 |
USSR Championship | D30 Queen's Gambit Declined |
| 9. Korchnoi vs O Dementiev |
| ½-½ | 59 |
1970 |
USSR Championship | D55 Queen's Gambit Declined |
| 10. O Dementiev vs V Liberzon |
| ½-½ | 32 |
1970 |
USSR Championship | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 11. Stein vs O Dementiev |
| ½-½ | 40 |
1970 |
USSR Championship | D34 Queen's Gambit Declined, Tarrasch |
| 12. O Dementiev vs Antoshin |
 | 0-1 | 37 |
1970 |
USSR Championship | C41 Philidor Defense |
| 13. O Dementiev vs Balashov |
| ½-½ | 30 |
1970 |
USSR Championship | E59 Nimzo-Indian, 4.e3, Main line |
| 14. M D Tseitlin vs O Dementiev |
| ½-½ | 43 |
1970 |
USSR Championship | B42 Sicilian, Kan |
| 15. Podgaets vs O Dementiev |
| ½-½ | 21 |
1970 |
USSR Championship | E69 King's Indian, Fianchetto, Classical Main line |
| 16. I Platonov vs O Dementiev |
| 0-1 | 35 |
1970 |
USSR Championship | D30 Queen's Gambit Declined |
| 17. I Zaitsev vs O Dementiev |
 | 1-0 | 20 |
1970 |
USSR Championship | B90 Sicilian, Najdorf |
| 18. O Dementiev vs Bagirov |
| 0-1 | 42 |
1970 |
USSR Championship | B03 Alekhine's Defense |
| 19. Karpov vs O Dementiev |
| ½-½ | 14 |
1970 |
16, Kuibyshev | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 20. O Dementiev vs Kholmov |
| 1-0 | 62 |
1970 |
USSR Championship | B17 Caro-Kann, Steinitz Variation |
| 21. O Dementiev vs Karasev |
| 1-0 | 33 |
1970 |
USSR Championship | D85 Grunfeld |
| 22. V Mikenas vs O Dementiev |
| 1-0 | 58 |
1970 |
USSR Championship | E73 King's Indian |
| 23. O Dementiev vs V Tukmakov |
| ½-½ | 47 |
1970 |
USSR Championship | B84 Sicilian, Scheveningen |
| 24. Karpov vs O Dementiev |
 | 1-0 | 43 |
1971 |
07, Leningrad tt-army | D12 Queen's Gambit Declined Slav |
| 25. O Dementiev vs Dzindzichashvili |
| 0-1 | 85 |
1972 |
USSR | B83 Sicilian |