| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Nezhmetdinov vs I Radulov |
 | 1-0 | 31 |
1967 |
Varna 4/413 | B31 Sicilian, Rossolimo Variation |
| 2. O'Kelly vs I Radulov |
| 0-1 | 35 |
1969 |
Habana (Cuba) | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 3. Hecht vs I Radulov |
| ½-½ | 46 |
1969 |
Raach zt | B31 Sicilian, Rossolimo Variation |
| 4. Adorjan vs I Radulov |
| 0-1 | 32 |
1970 |
Budapest (Hungary) | B60 Sicilian, Richter-Rauzer |
| 5. Jansa vs I Radulov |
| 1-0 | 35 |
1970 |
Budapest | B32 Sicilian |
| 6. A Hennings vs I Radulov |
| ½-½ | 27 |
1970 |
Varna | B57 Sicilian |
| 7. D Baretic vs I Radulov |
 | 1-0 | 12 |
1971 |
Vrsac | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 8. Vasiukov vs I Radulov |
| 0-1 | 34 |
1971 |
Varna | B31 Sicilian, Rossolimo Variation |
| 9. Mecking vs I Radulov |
 | 1-0 | 47 |
1971 |
Vrsac | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 10. I Saren vs I Radulov |
| ½-½ | 15 |
1972 |
Helsinki | B57 Sicilian |
| 11. E Paoli vs I Radulov |
| 0-1 | 39 |
1972 |
Toth mem | B57 Sicilian |
| 12. Tal vs I Radulov |
 | 1-0 | 73 |
1972 |
Skopje olm | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 13. A Hennings vs I Radulov |
 | 0-1 | 32 |
1972 |
Helsinki | B57 Sicilian |
| 14. Browne vs I Radulov |
| 1-0 | 41 |
1972 |
Hastings (England) | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 15. V Tukmakov vs I Radulov |
| ½-½ | 28 |
1972 |
Hastings 7273 | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 16. J Barle vs I Radulov |
| 1-0 | 38 |
1973 |
Vidmar mem | B31 Sicilian, Rossolimo Variation |
| 17. Suetin vs I Radulov |
| 1-0 | 31 |
1973 |
Ljubljana/Portoroz (Slovenia) | B60 Sicilian, Richter-Rauzer |
| 18. E Torre vs I Radulov |
| 0-1 | 30 |
1973 |
Leningrad izt | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 19. Velimirovic vs I Radulov |
| ½-½ | 43 |
1973 |
Vrsac | B57 Sicilian |
| 20. Tal vs I Radulov |
| 1-0 | 41 |
1973 |
Leningrad izt | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 21. B Enklaar vs I Radulov |
| 0-1 | 67 |
1974 |
Wijk aan Zee I | B60 Sicilian, Richter-Rauzer |
| 22. Matulovic vs I Radulov |
| 1-0 | 37 |
1974 |
Hoogovens | B64 Sicilian, Richter-Rauzer Attack |
| 23. Hecht vs I Radulov |
| 1-0 | 35 |
1974 |
Wijk aan Zee I | B57 Sicilian |
| 24. Hort vs I Radulov |
 | 1-0 | 17 |
1974 |
HUN | B64 Sicilian, Richter-Rauzer Attack |
| 25. Quinteros vs I Radulov |
| 0-1 | 92 |
1974 |
Wijk aan Zee I | B57 Sicilian |