| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. R Blumenfeld vs DeFirmian |
| 0-1 | 41 |
1976 |
Lone Pine (USA) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 2. Larry Evans vs DeFirmian |
| 1-0 | 35 |
1976 |
Lone Pine (USA) | B22 Sicilian, Alapin |
| 3. B Rogulj vs DeFirmian |
| 1-0 | 42 |
1976 |
USA | B92 Sicilian, Najdorf, Opocensky Variation |
| 4. K Spraggett vs DeFirmian |
 | 0-1 | 37 |
1976 |
Can. Open, Toronto | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 5. D J Strauss vs DeFirmian |
 | 0-1 | 18 |
1976 |
Lone Pine (USA) | B26 Sicilian, Closed, 6.Be3 |
| 6. G Ligterink vs DeFirmian |
| ½-½ | 44 |
1979 |
Lone Pine (USA) | B92 Sicilian, Najdorf, Opocensky Variation |
| 7. G Sigurjonsson vs DeFirmian |
| ½-½ | 31 |
1979 |
Lone Pine (USA) | B92 Sicilian, Najdorf, Opocensky Variation |
| 8. J Whitehead vs DeFirmian |
| 1-0 | 31 |
1980 |
Lone Pine (USA) | B50 Sicilian |
| 9. H Westerinen vs DeFirmian |
| ½-½ | 41 |
1980 |
Baerum | B93 Sicilian, Najdorf, 6.f4 |
| 10. J Frankle vs DeFirmian |
| 1-0 | 41 |
1980 |
Telephone | B21 Sicilian, 2.f4 and 2.d4 |
| 11. Navarro vs DeFirmian |
| 0-1 | 32 |
1980 |
Olympiad | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 12. A J Norris vs DeFirmian |
 | ½-½ | 40 |
1980 |
Olympiad | B93 Sicilian, Najdorf, 6.f4 |
| 13. G Honfi vs DeFirmian |
| 1-0 | 58 |
1981 |
It (cat.9) | B53 Sicilian |
| 14. E Nikolic vs DeFirmian |
| 0-1 | 39 |
1981 |
Smederevska Palanka (Yugoslavia) | B23 Sicilian, Closed |
| 15. Unzicker vs DeFirmian |
| 1-0 | 41 |
1981 |
It (cat.9) | B92 Sicilian, Najdorf, Opocensky Variation |
| 16. Z Krnic vs DeFirmian |
| ½-½ | 42 |
1981 |
Smederevska Palanka (Yugoslavia) | B50 Sicilian |
| 17. Matulovic vs DeFirmian |
| ½-½ | 42 |
1981 |
Nis (Yugoslavia) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 18. V Ciocaltea vs DeFirmian |
| ½-½ | 19 |
1981 |
Nis (Yugoslavia) | B93 Sicilian, Najdorf, 6.f4 |
| 19. Hjartarson vs DeFirmian |
| 0-1 | 58 |
1982 |
Reykjavik (Iceland) | B50 Sicilian |
| 20. B Abramovic vs DeFirmian |
| 1-0 | 56 |
1982 |
Reykjavik (Iceland) | B92 Sicilian, Najdorf, Opocensky Variation |
| 21. Iskov vs DeFirmian |
| 0-1 | 78 |
1982 |
Reykjavik (Iceland) | B90 Sicilian, Najdorf |
| 22. De Wit vs DeFirmian |
| 1-0 | 34 |
1982 |
London (England) | B93 Sicilian, Najdorf, 6.f4 |
| 23. Kudrin vs DeFirmian |
| 1-0 | 38 |
1983 |
Ch USA | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 24. I Radulov vs DeFirmian |
| ½-½ | 12 |
1983 |
Vrnjacka Banja | B93 Sicilian, Najdorf, 6.f4 |
| 25. B Ivanovic vs DeFirmian |
| 1-0 | 64 |
1983 |
It (cat.10) | B99 Sicilian, Najdorf, 7...Be7 Main line |