| 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. Navarro vs DeFirmian |
| 0-1 | 32 |
1980 |
Olympiad | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 3. Matulovic vs DeFirmian |
| ½-½ | 42 |
1981 |
Nis (Yugoslavia) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 4. B Ivanovic vs DeFirmian |
| 1-0 | 64 |
1983 |
It (cat.10) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 5. T Wedberg vs DeFirmian |
| 0-1 | 36 |
1984 |
Oslo (Norway) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 6. D Hansson vs DeFirmian |
| 0-1 | 26 |
1984 |
It (open) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 7. Ljubojevic vs DeFirmian |
 | 1-0 | 28 |
1986 |
Ch World (match) (candidates) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 8. D Keller vs DeFirmian |
| 0-1 | 28 |
1987 |
New York (USA) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 9. F Hellers vs DeFirmian |
| ½-½ | 24 |
1989 |
It (open) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 10. A Rodriguez vs DeFirmian |
| ½-½ | 19 |
1989 |
Ch World (team) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 11. Wolff vs DeFirmian |
| 0-1 | 60 |
1989 |
It (open) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 12. Ivanchuk vs DeFirmian |
| 1-0 | 33 |
1989 |
Reggio Emilia8990 | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 13. T Ernst vs DeFirmian |
| ½-½ | 36 |
1990 |
It (open) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 14. Ivanchuk vs DeFirmian |
| 1-0 | 33 |
1990 |
Reggio Emilia (Italy) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 15. G Markzon vs DeFirmian |
| ½-½ | 25 |
1991 |
It (open) | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 16. Shabalov vs DeFirmian |
| 1-0 | 37 |
1993 |
World Op, Philadelphia | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 17. M P Jacobsen vs DeFirmian |
| 0-1 | 40 |
2007 |
Arctic Chess Challenge | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 18. J Kvisla vs DeFirmian |
| 1-0 | 33 |
2007 |
Arctic Chess Challenge | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 19. E Najer vs DeFirmian |
| 1-0 | 31 |
2009 |
World Open | B99 Sicilian, Najdorf, 7...Be7 Main line |
