| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. N K Ivanov vs M Bobotsov |
| 1-0 | 32 |
1969 |
BUL-ch | B83 Sicilian |
| 2. N K Ivanov vs I Bilek |
| 0-1 | 30 |
1970 |
Varna | B06 Robatsch |
| 3. Smejkal vs N K Ivanov |
| 1-0 | 29 |
1971 |
Varna | D43 Queen's Gambit Declined Semi-Slav |
| 4. N K Ivanov vs Vasiukov |
| 0-1 | 38 |
1971 |
Varna | B02 Alekhine's Defense |
| 5. Kholmov vs N K Ivanov |
| 1-0 | 31 |
1972 |
Sukhumi | B40 Sicilian |
| 6. Savon vs N K Ivanov |
| 1-0 | 34 |
1972 |
Sukhumi | B29 Sicilian, Nimzovich-Rubinstein |
| 7. Huebner vs N K Ivanov |
| ½-½ | 42 |
1972 |
WchT U26 | A15 English |
| 8. Tal vs N K Ivanov |
 | 1-0 | 39 |
1972 |
Suhumi | A15 English |
| 9. N K Ivanov vs L Shamkovich |
| ½-½ | 28 |
1972 |
Timisoara (Romania) | E62 King's Indian, Fianchetto |
| 10. N K Ivanov vs W Schmidt |
| 1-0 | 16 |
1974 |
Rubinstein mem | A39 English, Symmetrical, Main line with d4 |
| 11. N K Ivanov vs F Kuijpers |
| 1-0 | 56 |
1974 |
Nice ol (Men) fin-A | A07 King's Indian Attack |
| 12. Tringov vs N K Ivanov |
| ½-½ | 20 |
1974 |
Birmingham | C42 Petrov Defense |
| 13. Tal vs N K Ivanov |
 | 0-1 | 37 |
1974 |
Novi Sad | B46 Sicilian, Taimanov Variation |
| 14. Wade vs N K Ivanov |
| 0-1 | 29 |
1974 |
Birmingham | D91 Grunfeld, 5.Bg5 |
| 15. J Lechtynsky vs N K Ivanov |
| 0-1 | 35 |
1974 |
Rubinstein mem | B22 Sicilian, Alapin |
| 16. N K Ivanov vs Suetin |
| ½-½ | 15 |
1974 |
Polanica Zdroj (Poland) | E63 King's Indian, Fianchetto, Panno Variation |
| 17. Reshevsky vs N K Ivanov |
| 0-1 | 42 |
1974 |
Olympiad (Finals) | A34 English, Symmetrical |
| 18. N K Ivanov vs S Mariotti |
| 1-0 | 31 |
1975 |
Budapest | A04 Reti Opening |
| 19. Szabo vs N K Ivanov |
| 1-0 | 16 |
1975 |
Budapest TUN | D03 Torre Attack (Tartakower Variation) |
| 20. N K Ivanov vs A Planinc |
| 1-0 | 27 |
1975 |
Vrsac | E68 King's Indian, Fianchetto, Classical Variation, 8.e4 |
| 21. N K Ivanov vs Jansa |
| ½-½ | 43 |
1975 |
Vrsac | E69 King's Indian, Fianchetto, Classical Main line |
| 22. N K Ivanov vs Smejkal |
| ½-½ | 13 |
1975 |
Budapest Tungsram | A07 King's Indian Attack |
| 23. Filip vs N K Ivanov |
| ½-½ | 21 |
1976 |
Rubinstein Mem | D90 Grunfeld |
| 24. N K Ivanov vs Geller |
| ½-½ | 16 |
1976 |
Sochi | E06 Catalan, Closed, 5.Nf3 |
| 25. J Boudy vs N K Ivanov |
| ½-½ | 11 |
1976 |
Rubinstein mem | D97 Grunfeld, Russian |