| page 1 of 1; 20 games |
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| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. DeFirmian vs Silman |
 | 0-1 | 35 |
1976 |
Lone Pine (USA) | C92 Ruy Lopez, Closed |
| 2. DeFirmian vs P Nikolic |
| 0-1 | 39 |
1980 |
Olympiad | C92 Ruy Lopez, Closed |
| 3. DeFirmian vs Hjartarson |
| 0-1 | 69 |
1984 |
Reykjavik (Iceland) | C92 Ruy Lopez, Closed |
| 4. DeFirmian vs P Nikolic |
 | 1-0 | 37 |
1985 |
Tunis | C92 Ruy Lopez, Closed |
| 5. DeFirmian vs Beliavsky |
| 0-1 | 40 |
1985 |
Izt | C92 Ruy Lopez, Closed |
| 6. DeFirmian vs Christiansen |
| ½-½ | 46 |
1986 |
USA-ch | C92 Ruy Lopez, Closed |
| 7. DeFirmian vs Granda-Zuniga |
| 1-0 | 43 |
1987 |
New York (USA) | C92 Ruy Lopez, Closed |
| 8. DeFirmian vs J Benjamin |
| 1-0 | 31 |
1988 |
Ch USA | C92 Ruy Lopez, Closed |
| 9. DeFirmian vs A Ivanov |
| 0-1 | 60 |
1988 |
Chicago (USA) | C92 Ruy Lopez, Closed |
| 10. DeFirmian vs Karpov |
| ½-½ | 14 |
1989 |
Reggio Emilia 8990 | C92 Ruy Lopez, Closed |
| 11. DeFirmian vs A Ivanov |
| ½-½ | 46 |
1989 |
San | C92 Ruy Lopez, Closed |
| 12. DeFirmian vs A Ivanov |
| 0-1 | 48 |
1989 |
Las Vegas (USA) | C92 Ruy Lopez, Closed |
| 13. DeFirmian vs G Timoshchenko |
| 1-0 | 52 |
1990 |
Cup World (select) | C92 Ruy Lopez, Closed |
| 14. DeFirmian vs A Ivanov |
| 1-0 | 40 |
1993 |
World Op, Philadelphia | C92 Ruy Lopez, Closed |
| 15. DeFirmian vs A Ivanov |
| ½-½ | 24 |
1994 |
Key West, Florida | C92 Ruy Lopez, Closed |
| 16. DeFirmian vs A Ivanov |
| ½-½ | 44 |
1996 |
ch-USA, Parsippany | C92 Ruy Lopez, Closed |
| 17. DeFirmian vs Igor Ivanov |
| 1-0 | 43 |
1996 |
ch-USA, Parsippany | C92 Ruy Lopez, Closed |
| 18. DeFirmian vs Fressinet |
| 0-1 | 47 |
2003 |
2nd Milk Tournament | C92 Ruy Lopez, Closed |
| 19. DeFirmian vs Hjartarson |
| 0-1 | 49 |
2003 |
Greenland Open | C92 Ruy Lopez, Closed |
| 20. DeFirmian vs E Haugstad |
| 1-0 | 35 |
2007 |
Arctic Chess Challenge | C92 Ruy Lopez, Closed |
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| page 1 of 1; 20 games |
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Secrets of Opening Surprises
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