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| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Alburt vs DeFirmian |
| 1-0 | 34 |
1985 |
Ch USA | A63 Benoni, Fianchetto, 9...Nbd7 |
| 2. Alburt vs DeFirmian |
| 1-0 | 20 |
1985 |
USA | A63 Benoni, Fianchetto, 9...Nbd7 |
| 3. Sosonko vs DeFirmian |
| ½-½ | 25 |
1985 |
Izt | A63 Benoni, Fianchetto, 9...Nbd7 |
| 4. P Nikolic vs DeFirmian |
| 1-0 | 40 |
1986 |
It (cat.12) | A63 Benoni, Fianchetto, 9...Nbd7 |
| 5. J Brenninkmeijer vs DeFirmian |
| ½-½ | 50 |
1989 |
It (open) | A63 Benoni, Fianchetto, 9...Nbd7 |
| 6. Akopian vs DeFirmian |
| ½-½ | 41 |
1990 |
Cup World (select) | A63 Benoni, Fianchetto, 9...Nbd7 |
| 7. P Glavina vs DeFirmian |
| 1-0 | 42 |
1993 |
It (active) | A63 Benoni, Fianchetto, 9...Nbd7 |
| 8. D Gurevich vs DeFirmian |
| ½-½ | 30 |
1994 |
Key West, Florida | A63 Benoni, Fianchetto, 9...Nbd7 |
| 9. Kaidanov vs DeFirmian |
| ½-½ | 44 |
1996 |
ch-USA, Parsippany | A63 Benoni, Fianchetto, 9...Nbd7 |
| 10. P Nikolic vs DeFirmian |
 | 1-0 | 37 |
2003 |
Greenland Open | A63 Benoni, Fianchetto, 9...Nbd7 |
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