| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. Lengyel vs I Radulov |
| ½-½ | 18 | 1971 | Sarajevo | D63 Queen's Gambit Declined, Orthodox Defense |
| 2. G Szilagyi vs I Radulov |
| ½-½ | 15 | 1971 | Varna | D63 Queen's Gambit Declined, Orthodox Defense |
| 3. Bobotsov vs I Radulov |
| 1-0 | 35 | 1971 | Varna | D63 Queen's Gambit Declined, Orthodox Defense |
| 4. P Peev vs I Radulov |
| ½-½ | 38 | 1972 | Bulgarian Championship | D63 Queen's Gambit Declined, Orthodox Defense |
| 5. N Padevsky vs I Radulov |
| ½-½ | 14 | 1974 | Vrnjacka Banja | D63 Queen's Gambit Declined, Orthodox Defense |
| 6. Ribli vs I Radulov |
| ½-½ | 20 | 1974 | Torneo del Vino | D63 Queen's Gambit Declined, Orthodox Defense |
| 7. Polugaevsky vs I Radulov |
| ½-½ | 51 | 1975 | Torneo del Vino | D63 Queen's Gambit Declined, Orthodox Defense |
| 8. E Bukic vs I Radulov |
| 1-0 | 27 | 1976 | Uljma | D63 Queen's Gambit Declined, Orthodox Defense |
| 9. Uhlmann vs I Radulov |
| ½-½ | 56 | 1977 | Vrbas | D63 Queen's Gambit Declined, Orthodox Defense |
| 10. Smejkal vs I Radulov |
| 1-0 | 40 | 1977 | October Revolution 60th Anniversary | D63 Queen's Gambit Declined, Orthodox Defense |
| 11. Filip vs I Radulov |
| ½-½ | 25 | 1977 | Kragujevac | D63 Queen's Gambit Declined, Orthodox Defense |
| 12. Gheorghiu vs I Radulov |
| 1-0 | 42 | 1978 | Baile Herculane Balkaniad | D63 Queen's Gambit Declined, Orthodox Defense |
| 13. G Garcia Gonzalez vs I Radulov |
| 0-1 | 56 | 1978 | Buenos Aires Olympiad | D63 Queen's Gambit Declined, Orthodox Defense |
| 14. Lengyel vs I Radulov |
| ½-½ | 18 | 1979 | Warsaw Zonal-A | D63 Queen's Gambit Declined, Orthodox Defense |
| 15. A Kuligowski vs I Radulov |
| 1-0 | 36 | 1979 | Smederevska Palanka | D63 Queen's Gambit Declined, Orthodox Defense |
| 16. B Brinck-Claussen vs I Radulov |
| ½-½ | 13 | 1981 | Copenhagen Open | D63 Queen's Gambit Declined, Orthodox Defense |
| 17. D Donchev vs I Radulov |
| ½-½ | 19 | 1984 | Bulgarian Championship | D63 Queen's Gambit Declined, Orthodox Defense |
Kibitzing
