| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. Westerinen vs de Firmian |
| ½-½ | 41 | 1980 | Baerum | B93 Sicilian, Najdorf, 6.f4 |
| 2. A J Norris vs de Firmian |
 | ½-½ | 40 | 1980 | Valletta Olympiad | B93 Sicilian, Najdorf, 6.f4 |
| 3. V Ciocaltea vs de Firmian |
| ½-½ | 19 | 1981 | Nis | B93 Sicilian, Najdorf, 6.f4 |
| 4. J de Wit vs de Firmian |
| 1-0 | 34 | 1982 | 6th Lloyds Bank Masters Open | B93 Sicilian, Najdorf, 6.f4 |
| 5. I Radulov vs de Firmian |
| ½-½ | 12 | 1983 | Vrnjacka Banja | B93 Sicilian, Najdorf, 6.f4 |
| 6. P Cramling vs de Firmian |
| ½-½ | 42 | 1984 | Bunadarbanka | B93 Sicilian, Najdorf, 6.f4 |
| 7. L-A Schneider vs de Firmian |
| 1-0 | 42 | 1984 | Reykjavik Open | B93 Sicilian, Najdorf, 6.f4 |
| 8. S Kindermann vs de Firmian |
| 1-0 | 39 | 1986 | Biel-JMT | B93 Sicilian, Najdorf, 6.f4 |
| 9. D V Prasad vs de Firmian |
| ½-½ | 32 | 1987 | Kolhapur (India) | B93 Sicilian, Najdorf, 6.f4 |
| 10. A Sokolov vs de Firmian |
| ½-½ | 27 | 1990 | Reykjavik Summit | B93 Sicilian, Najdorf, 6.f4 |
| 11. O Reeh vs de Firmian |
| ½-½ | 43 | 1993 | Hamburg | B93 Sicilian, Najdorf, 6.f4 |
| 12. Shaked vs de Firmian |
| 0-1 | 23 | 1993 | New York open | B93 Sicilian, Najdorf, 6.f4 |
| 13. H Axelsson vs de Firmian |
| ½-½ | 38 | 1994 | Cup Rilton | B93 Sicilian, Najdorf, 6.f4 |
| 14. Zsofia Polgar vs de Firmian |
| 0-1 | 44 | 1995 | Pan Pacific International | B93 Sicilian, Najdorf, 6.f4 |
| 15. S Kindermann vs de Firmian |
| ½-½ | 43 | 1995 | Biel | B93 Sicilian, Najdorf, 6.f4 |
| 16. K Arakhamia-Grant vs de Firmian |
| 0-1 | 48 | 1997 | 4th World Team Ch | B93 Sicilian, Najdorf, 6.f4 |
| 17. L Dominguez vs de Firmian |
| 1-0 | 51 | 2000 | Istanbul Olympiad | B93 Sicilian, Najdorf, 6.f4 |
| 18. J Friedel vs de Firmian |
| ½-½ | 50 | 2006 | US Championship 2006 | B93 Sicilian, Najdorf, 6.f4 |
Kibitzing
