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| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Portisch vs Y Porat |
| 1-0 | 44 |
1964 |
Tel Aviv | E59 Nimzo-Indian, 4.e3, Main line |
| 2. Portisch vs O Sarapu |
| 1-0 | 36 |
1967 |
Sousse | E59 Nimzo-Indian, 4.e3, Main line |
| 3. Portisch vs Spassky |
| ½-½ | 26 |
1977 |
Geneve | E59 Nimzo-Indian, 4.e3, Main line |
| 4. Portisch vs Spassky |
| ½-½ | 36 |
1977 |
Geneve | E59 Nimzo-Indian, 4.e3, Main line |
| 5. Portisch vs Sosonko |
| 1-0 | 38 |
1978 |
Tilburg | E59 Nimzo-Indian, 4.e3, Main line |
| 6. Portisch vs Spassky |
| ½-½ | 33 |
1980 |
Mexico | E59 Nimzo-Indian, 4.e3, Main line |
| 7. Portisch vs Miles |
| ½-½ | 89 |
1981 |
Tilburg | E59 Nimzo-Indian, 4.e3, Main line |
| 8. Portisch vs F Braga |
| 1-0 | 36 |
1992 |
3, Reggio Emilia9293 [Hiarcs 7.32 (10s) | E59 Nimzo-Indian, 4.e3, Main line |
| 9. Portisch vs Rozentalis |
| ½-½ | 65 |
1992 |
Debrecen | E59 Nimzo-Indian, 4.e3, Main line |
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Secrets of Opening Surprises
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