| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Portisch vs R T Cardoso |
| ½-½ | 74 |
1956 |
Moscow | E30 Nimzo-Indian, Leningrad |
| 2. R T Cardoso vs Fischer |
 | 1-0 | 40 |
1957 |
New York m | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 3. Fischer vs R T Cardoso |
 | 1-0 | 31 |
1957 |
New York m | B90 Sicilian, Najdorf |
| 4. R T Cardoso vs Fischer |
 | 0-1 | 52 |
1957 |
New York m | B98 Sicilian, Najdorf |
| 5. Bahgat vs R T Cardoso |
| 0-1 | 56 |
1957 |
Toronto-jr | C31 King's Gambit Declined, Falkbeer Counter Gambit |
| 6. Fischer vs R T Cardoso |
 | 1-0 | 32 |
1957 |
Match | A04 Reti Opening |
| 7. R T Cardoso vs Fischer |
 | ½-½ | 56 |
1957 |
New York m | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 8. Fischer vs R T Cardoso |
 | ½-½ | 46 |
1957 |
New York m | B90 Sicilian, Najdorf |
| 9. R T Cardoso vs Fischer |
 | 0-1 | 36 |
1957 |
New York m | B55 Sicilian, Prins Variation, Venice Attack |
| 10. R T Cardoso vs Lombardy |
| 0-1 | 67 |
1957 |
Wch U20 | B92 Sicilian, Najdorf, Opocensky Variation |
| 11. Fischer vs R T Cardoso |
 | 1-0 | 46 |
1957 |
New York m | B90 Sicilian, Najdorf |
| 12. R T Cardoso vs Szabo |
| 0-1 | 51 |
1958 |
Portoroz | C87 Ruy Lopez |
| 13. E Chalabi vs R T Cardoso |
| 1-0 | 52 |
1958 |
13th olm final C | A17 English |
| 14. R T Cardoso vs E Chalabi |
| 1-0 | 32 |
1958 |
13th olm qual. group 3 | E80 King's Indian, Samisch Variation |
| 15. Filip vs R T Cardoso |
| 1-0 | 34 |
1958 |
Portoroz izt | A15 English |
| 16. Petrosian vs R T Cardoso |
 | 1-0 | 41 |
1958 |
Izt | E40 Nimzo-Indian, 4.e3 |
| 17. R Cintron vs R T Cardoso |
| 0-1 | 42 |
1958 |
13th olm final C | E26 Nimzo-Indian, Samisch |
| 18. R T Cardoso vs Panno |
 | 0-1 | 57 |
1958 |
Portoroz izt | B90 Sicilian, Najdorf |
| 19. H Rossetto vs R T Cardoso |
 | 1-0 | 47 |
1958 |
Portoroz izt | A34 English, Symmetrical |
| 20. R T Cardoso vs E Rojahn |
| ½-½ | 23 |
1958 |
13th olm final C | B70 Sicilian, Dragon Variation |
| 21. W Fairhurst vs R T Cardoso |
| 0-1 | 38 |
1958 |
13th olm qual. group 3 | E11 Bogo-Indian Defense |
| 22. R T Cardoso vs A Matanovic |
| 0-1 | 34 |
1958 |
Portoroz izt | B90 Sicilian, Najdorf |
| 23. R T Cardoso vs J Penrose |
 | 0-1 | 42 |
1958 |
Olympiad | A42 Modern Defense, Averbakh System |
| 24. Sliwa vs R T Cardoso |
| 1-0 | 48 |
1958 |
Munich ol (Men) prel | D37 Queen's Gambit Declined |
| 25. R T Cardoso vs J Durao |
| ½-½ | 41 |
1958 |
13th olm final C | D44 Queen's Gambit Declined Semi-Slav |