| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. H Westerinen vs DeFirmian |
| ½-½ | 41 |
1980 |
Baerum | B93 Sicilian, Najdorf, 6.f4 |
| 2. A J Norris vs DeFirmian |
 | ½-½ | 40 |
1980 |
Olympiad | B93 Sicilian, Najdorf, 6.f4 |
| 3. V Ciocaltea vs DeFirmian |
| ½-½ | 19 |
1981 |
Nis (Yugoslavia) | B93 Sicilian, Najdorf, 6.f4 |
| 4. De Wit vs DeFirmian |
| 1-0 | 34 |
1982 |
London (England) | B93 Sicilian, Najdorf, 6.f4 |
| 5. I Radulov vs DeFirmian |
| ½-½ | 12 |
1983 |
Vrnjacka Banja | B93 Sicilian, Najdorf, 6.f4 |
| 6. D Cramling vs DeFirmian |
| ½-½ | 42 |
1984 |
Bunadarbanka (Iceland) | B93 Sicilian, Najdorf, 6.f4 |
| 7. L Schneider vs DeFirmian |
| 1-0 | 42 |
1984 |
Reykjavik (Iceland) | B93 Sicilian, Najdorf, 6.f4 |
| 8. S Kindermann vs DeFirmian |
| 1-0 | 39 |
1986 |
Biel (Switzerland) | B93 Sicilian, Najdorf, 6.f4 |
| 9. D V Prasad vs DeFirmian |
| ½-½ | 32 |
1987 |
Kolhapur (India) | B93 Sicilian, Najdorf, 6.f4 |
| 10. A Sokolov vs DeFirmian |
| ½-½ | 27 |
1990 |
Match (team) | B93 Sicilian, Najdorf, 6.f4 |
| 11. Shaked vs DeFirmian |
| 0-1 | 23 |
1993 |
New York op (06) | B93 Sicilian, Najdorf, 6.f4 |
| 12. O Reeh vs DeFirmian |
| ½-½ | 43 |
1993 |
It (open) | B93 Sicilian, Najdorf, 6.f4 |
| 13. H Axelsson vs DeFirmian |
| ½-½ | 38 |
1994 |
Cup Rilton | B93 Sicilian, Najdorf, 6.f4 |
| 14. S Kindermann vs DeFirmian |
| ½-½ | 43 |
1995 |
It (cat.15) | B93 Sicilian, Najdorf, 6.f4 |
| 15. Zsofia Polgar vs DeFirmian |
| 0-1 | 44 |
1995 |
San Francisco (Pan Pacific), | B93 Sicilian, Najdorf, 6.f4 |
| 16. L Dominguez vs DeFirmian |
| 1-0 | 51 |
2000 |
34th Olympiad | B93 Sicilian, Najdorf, 6.f4 |
| 17. J Friedel vs DeFirmian |
| ½-½ | 50 |
2006 |
US Championship 2006 | B93 Sicilian, Najdorf, 6.f4 |
