| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. R T Cardoso vs Fischer |
 | 0-1 | 52 |
1957 |
New York m | B98 Sicilian, Najdorf |
| 2. R T Cardoso vs Fischer |
 | ½-½ | 56 |
1957 |
New York m | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 3. R T Cardoso vs Lombardy |
| 0-1 | 67 |
1957 |
Wch U20 | B92 Sicilian, Najdorf, Opocensky Variation |
| 4. R T Cardoso vs Fischer |
 | 0-1 | 36 |
1957 |
New York m | B55 Sicilian, Prins Variation, Venice Attack |
| 5. R T Cardoso vs Fischer |
 | 1-0 | 40 |
1957 |
New York m | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 6. R T Cardoso vs Larsen |
| ½-½ | 54 |
1958 |
Portoroz izt | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 7. R T Cardoso vs Szabo |
| 0-1 | 42 |
1958 |
13th olm qual. group 3 | B27 Sicilian |
| 8. R T Cardoso vs Benko |
| 0-1 | 40 |
1958 |
Portoroz izt | B57 Sicilian |
| 9. R T Cardoso vs G Primavera |
| 1-0 | 63 |
1958 |
13th olm final C | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 10. R T Cardoso vs Gligoric |
| 0-1 | 42 |
1958 |
Portoroz izt | B43 Sicilian, Kan, 5.Nc3 |
| 11. R T Cardoso vs Tal |
| ½-½ | 44 |
1958 |
Portoroz izt | B36 Sicilian, Accelerated Fianchetto |
| 12. R T Cardoso vs E Rojahn |
| ½-½ | 23 |
1958 |
13th olm final C | B70 Sicilian, Dragon Variation |
| 13. R T Cardoso vs A Matanovic |
| 0-1 | 34 |
1958 |
Portoroz izt | B90 Sicilian, Najdorf |
| 14. R T Cardoso vs Panno |
 | 0-1 | 57 |
1958 |
Portoroz izt | B90 Sicilian, Najdorf |
| 15. R T Cardoso vs O Sarapu |
 | 1-0 | 55 |
1967 |
74th New Zealand Championship | B56 Sicilian |
| 16. R T Cardoso vs Quinteros |
| 0-1 | 46 |
1973 |
Bauang it | B28 Sicilian, O'Kelly Variation |
| 17. R T Cardoso vs S Tatai |
| 1-0 | 44 |
1973 |
Bauang it | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 18. R T Cardoso vs Gheorghiu |
| 0-1 | 41 |
1973 |
Manila | B83 Sicilian |
| 19. R T Cardoso vs Ljubojevic |
| 0-1 | 45 |
1973 |
Manila | B20 Sicilian |
| 20. R T Cardoso vs H Ardiansyah |
| 1-0 | 41 |
1973 |
Manila | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 21. R T Cardoso vs Gligoric |
| 0-1 | 56 |
1974 |
Manila | B88 Sicilian, Fischer-Sozin Attack |
| 22. R T Cardoso vs Ulf Andersson |
 | 0-1 | 75 |
1974 |
It, Manila (Philippines) | B81 Sicilian, Scheveningen, Keres Attack |
| 23. R T Cardoso vs Portisch |
| 1-0 | 60 |
1974 |
Manila | B84 Sicilian, Scheveningen |
| 24. R T Cardoso vs Kavalek |
| ½-½ | 50 |
1974 |
Manila | B43 Sicilian, Kan, 5.Nc3 |
| 25. R T Cardoso vs Kraidman |
| 0-1 | 37 |
1974 |
Manila | B32 Sicilian |