Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. Forintos vs de Firmian |
| 1-0 | 64 | 1982 | Gausdal International | A70 Benoni, Classical with 7.Nf3 |
2. Hjartarson vs de Firmian |
 | 1-0 | 45 | 1984 | Reykjavik Open | A70 Benoni, Classical with 7.Nf3 |
3. Van der Sterren vs de Firmian |
| ½-½ | 42 | 1984 | Politiken Cup | A70 Benoni, Classical with 7.Nf3 |
4. D Sahovic vs de Firmian |
| ½-½ | 57 | 1984 | Bor | A70 Benoni, Classical with 7.Nf3 |
5. Hjartarson vs de Firmian |
| 1-0 | 39 | 1985 | Bronshoj | A70 Benoni, Classical with 7.Nf3 |
6. Browne vs de Firmian |
| 1-0 | 35 | 1985 | United States Championship | A70 Benoni, Classical with 7.Nf3 |
7. Browne vs de Firmian |
 | 0-1 | 43 | 1987 | Pan Pacific International | A70 Benoni, Classical with 7.Nf3 |
8. J Whitehead vs de Firmian |
| 0-1 | 37 | 1987 | United States Championship | A70 Benoni, Classical with 7.Nf3 |
9. S Polgar vs de Firmian |
 | 1-0 | 50 | 1989 | New York Open | A70 Benoni, Classical with 7.Nf3 |
10. Miles vs de Firmian |
| ½-½ | 45 | 1989 | United States Championship | A70 Benoni, Classical with 7.Nf3 |
11. Alburt vs de Firmian |
 | 1-0 | 42 | 1990 | US Championship | A70 Benoni, Classical with 7.Nf3 |
12. Karpov vs de Firmian |
  | 1-0 | 43 | 1990 | Biel | A70 Benoni, Classical with 7.Nf3 |
13. Khalifman vs de Firmian |
| ½-½ | 28 | 1990 | Manila Interzonal | A70 Benoni, Classical with 7.Nf3 |
14. Benjamin vs de Firmian |
| 1-0 | 37 | 1993 | New York Open | A70 Benoni, Classical with 7.Nf3 |
15. W Schmidt vs de Firmian |
| 0-1 | 29 | 1994 | Biel MTO op | A70 Benoni, Classical with 7.Nf3 |
16. B Ahlander vs de Firmian |
 | 0-1 | 37 | 1994 | Rilton Cup 1993/94 | A70 Benoni, Classical with 7.Nf3 |
17. I Ibragimov vs de Firmian |
| ½-½ | 21 | 1994 | Reykjavik Open | A70 Benoni, Classical with 7.Nf3 |
18. H Olafsson vs de Firmian |
 | 0-1 | 25 | 1994 | Reykjavik Open | A70 Benoni, Classical with 7.Nf3 |
19. I Sokolov vs de Firmian |
| ½-½ | 15 | 1994 | Akureyri | A70 Benoni, Classical with 7.Nf3 |
20. V Akopian vs de Firmian |
| ½-½ | 44 | 1994 | National op | A70 Benoni, Classical with 7.Nf3 |
21. Browne vs de Firmian |
 | 1-0 | 47 | 1994 | United States Championship | A70 Benoni, Classical with 7.Nf3 |
22. A Sorin vs de Firmian |
 | 0-1 | 34 | 1995 | Buenos Aires Najdorf | A70 Benoni, Classical with 7.Nf3 |
23. Dreev vs de Firmian |
 | 1-0 | 27 | 1995 | Biel | A70 Benoni, Classical with 7.Nf3 |
24. Krasenkow vs de Firmian |
 | 1-0 | 71 | 1995 | Rubinstein Memorial 32nd | A70 Benoni, Classical with 7.Nf3 |
25. Gavrikov vs de Firmian |
| ½-½ | 21 | 1995 | Biel | A70 Benoni, Classical with 7.Nf3 |