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| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Portisch vs Hort |
| ½-½ | 34 |
1966 |
Kecskemet | D97 Grunfeld, Russian |
| 2. Hort vs Portisch |
| ½-½ | 23 |
1967 |
Sousse Interzonal | B43 Sicilian, Kan, 5.Nc3 |
| 3. Portisch vs Hort |
| ½-½ | 14 |
1967 |
Halle zt | D10 Queen's Gambit Declined Slav |
| 4. Hort vs Portisch |
 | 1-0 | 30 |
1968 |
Monaco | C47 Four Knights |
| 5. Hort vs Portisch |
| 1-0 | 58 |
1968 |
Wijk aan Zee | B26 Sicilian, Closed, 6.Be3 |
| 6. Portisch vs Hort |
| 1-0 | 86 |
1968 |
Lugano | A07 King's Indian Attack |
| 7. Hort vs Portisch |
| 0-1 | 32 |
1968 |
Skopje/Ohrid 6/338 | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 8. Hort vs Portisch |
| 1-0 | 41 |
1969 |
Monaco | C45 Scotch Game |
| 9. Hort vs Portisch |
| ½-½ | 29 |
1970 |
Siegen ol (Men) fin-A | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 10. Portisch vs Hort |
 | 1-0 | 37 |
1970 |
Palma de Mallorca Interzonal | D98 Grunfeld, Russian |
| 11. Portisch vs Hort |
| ½-½ | 40 |
1970 |
Hastings 1970/71 | A56 Benoni Defense |
| 12. Hort vs Portisch |
| ½-½ | 13 |
1970 |
Kapfenberg ETC | D73 Neo-Grunfeld, 5.Nf3 |
| 13. Hort vs Portisch |
| 0-1 | 37 |
1972 |
San Antonio | B50 Sicilian |
| 14. Portisch vs Hort |
| ½-½ | 14 |
1972 |
Wijk aan Zee | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 15. Hort vs Portisch |
| ½-½ | 69 |
1972 |
Skopje (ol) 14/661 | E75 King's Indian, Averbakh, Main line |
| 16. Portisch vs Hort |
| ½-½ | 27 |
1973 |
Petropolis Interzonal | D19 Queen's Gambit Declined Slav, Dutch |
| 17. Hort vs Portisch |
 | 1-0 | 32 |
1973 |
Madrid | D63 Queen's Gambit Declined, Orthodox Defense |
| 18. Hort vs Portisch |
| ½-½ | 53 |
1974 |
Nice | E04 Catalan, Open, 5.Nf3 |
| 19. Portisch vs Hort |
| ½-½ | 33 |
1975 |
Portoroz/Ljubljana | E62 King's Indian, Fianchetto |
| 20. Hort vs Portisch |
 | 0-1 | 86 |
1975 |
Wijk aan Zee Hoogovens | E10 Queen's Pawn Game |
| 21. Portisch vs Hort |
| 1-0 | 26 |
1978 |
Niksic | E58 Nimzo-Indian, 4.e3, Main line with 8...Bxc3 |
| 22. Hort vs Portisch |
| ½-½ | 25 |
1978 |
Bugojno | C49 Four Knights |
| 23. Portisch vs Hort |
| ½-½ | 11 |
1978 |
Tilburg | A16 English |
| 24. Hort vs Portisch |
| ½-½ | 44 |
1979 |
Montreal | C09 French, Tarrasch, Open Variation, Main line |
| 25. Portisch vs Hort |
| ½-½ | 58 |
1979 |
Tilburg | D78 Neo-Grunfeld, 6.O-O c6 |
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| page 1 of 2; games 1-25 of 40 |
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