| page 1 of 7; games 1-25 of 158 |
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| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. S Johannessen vs Portisch |
| ½-½ | 26 |
1955 |
Antwerp | C63 Ruy Lopez, Schliemann Defense |
| 2. Filip vs Portisch |
| 0-1 | 28 |
1956 |
Debrecen | C70 Ruy Lopez |
| 3. G Plaetz vs Portisch |
| ½-½ | 15 |
1956 |
Moscow | C68 Ruy Lopez, Exchange |
| 4. P De Rooi vs Portisch |
| 0-1 | 33 |
1963 |
Amsterdam | C68 Ruy Lopez, Exchange |
| 5. Ivkov vs Portisch |
| ½-½ | 56 |
1963 |
Sarajevo | C93 Ruy Lopez, Closed, Smyslov Defense |
| 6. J T Barendregt vs Portisch |
 | 1-0 | 41 |
1963 |
Amsterdam | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 7. F Kuijpers vs Portisch |
| 0-1 | 30 |
1963 |
Amsterdam | C90 Ruy Lopez, Closed |
| 8. T Filep vs Portisch |
| ½-½ | 36 |
1963 |
Ungarn | C93 Ruy Lopez, Closed, Smyslov Defense |
| 9. M Pavlov vs Portisch |
| ½-½ | 19 |
1963 |
Halle | C92 Ruy Lopez, Closed |
| 10. H Lehmann vs Portisch |
| ½-½ | 59 |
1964 |
Malaga | C95 Ruy Lopez, Closed, Breyer |
| 11. I Nei vs Portisch |
 | 1-0 | 28 |
1964 |
Beverwijk | C78 Ruy Lopez |
| 12. Robatsch vs Portisch |
| ½-½ | 20 |
1964 |
Malaga | C95 Ruy Lopez, Closed, Breyer |
| 13. C B Van den Berg vs Portisch |
| ½-½ | 55 |
1964 |
Beverwijk | C93 Ruy Lopez, Closed, Smyslov Defense |
| 14. J Pogats vs Portisch |
| ½-½ | 40 |
1964 |
Ungarn | C78 Ruy Lopez |
| 15. F Kuijpers vs Portisch |
| 0-1 | 36 |
1964 |
Tel Aviv | C94 Ruy Lopez, Closed, Breyer Defense |
| 16. M Damjanovic vs Portisch |
| ½-½ | 19 |
1965 |
Zagreb | C92 Ruy Lopez, Closed |
| 17. K Langeweg vs Portisch |
| ½-½ | 36 |
1965 |
Beverwijk | C94 Ruy Lopez, Closed, Breyer Defense |
| 18. Petrosian vs Portisch |
| ½-½ | 23 |
1965 |
Hamburg | C94 Ruy Lopez, Closed, Breyer Defense |
| 19. P Dely vs Portisch |
| ½-½ | 26 |
1965 |
Ungarn | C90 Ruy Lopez, Closed |
| 20. Unzicker vs Portisch |
| ½-½ | 28 |
1965 |
? | C92 Ruy Lopez, Closed |
| 21. Gheorghiu vs Portisch |
| ½-½ | 25 |
1965 |
Hamburg | C95 Ruy Lopez, Closed, Breyer |
| 22. Schmid vs Portisch |
| 0-1 | 56 |
1965 |
Erevan | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 23. Tal vs Portisch |
| 1-0 | 47 |
1965 |
Bled | C92 Ruy Lopez, Closed |
| 24. Fischer vs Portisch |
 | ½-½ | 71 |
1966 |
Santa Monica (1) | C95 Ruy Lopez, Closed, Breyer |
| 25. Unzicker vs Portisch |
| ½-½ | 21 |
1966 |
Santa Monica | C95 Ruy Lopez, Closed, Breyer |
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| page 1 of 7; games 1-25 of 158 |
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Secrets of Opening Surprises
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