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| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. DeFirmian vs G Agzamov |
| 0-1 | 30 |
1983 |
Stara | C80 Ruy Lopez, Open |
| 2. DeFirmian vs G Agzamov |
| 0-1 | 38 |
1983 |
Vrsac | C80 Ruy Lopez, Open |
| 3. DeFirmian vs J Kristiansen |
| 1-0 | 25 |
1984 |
Bunadarbanka (Iceland) | C80 Ruy Lopez, Open |
| 4. DeFirmian vs Huebner |
| ½-½ | 39 |
1984 |
Oslo (Norway) | C80 Ruy Lopez, Open |
| 5. DeFirmian vs Ivanchuk |
| ½-½ | 20 |
1988 |
It (open) | C80 Ruy Lopez, Open |
| 6. DeFirmian vs F Hellers |
| ½-½ | 33 |
1989 |
It (open) | C80 Ruy Lopez, Open |
| 7. DeFirmian vs M N Abdel |
| 1-0 | 40 |
1989 |
Ch World (team) | C80 Ruy Lopez, Open |
| 8. DeFirmian vs T Ernst |
| ½-½ | 59 |
1994 |
It (open) | C80 Ruy Lopez, Open |
| 9. DeFirmian vs Timman |
| ½-½ | 23 |
1995 |
It (cat.15) | C80 Ruy Lopez, Open |
| 10. DeFirmian vs M Vucic |
| ½-½ | 50 |
1999 |
Koltanowski Team Match | C80 Ruy Lopez, Open |
| 11. DeFirmian vs D Schneider |
| 1-0 | 33 |
2005 |
National Open | C80 Ruy Lopez, Open |
| 12. DeFirmian vs P MacIntyre |
| ½-½ | 21 |
2006 |
34th World Open | C80 Ruy Lopez, Open |
| 13. DeFirmian vs V Mikhalevski |
| ½-½ | 60 |
2006 |
National Open | C80 Ruy Lopez, Open |
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Secrets of Opening Surprises
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