| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. R Cardoso vs B Soos |
| 0-1 | 37 | 1956 | Moscow Olympiad qual-4 | B45 Sicilian, Taimanov |
| 2. Portisch vs R Cardoso |
 | ½-½ | 74 | 1956 | Moscow Olympiad qual-4 | E30 Nimzo-Indian, Leningrad |
| 3. R Cardoso vs G P Thibaut |
| 1-0 | 27 | 1956 | Moscow Olympiad qual-4 | C64 Ruy Lopez, Classical |
| 4. D Assar vs R Cardoso |
| 0-1 | 72 | 1956 | Moscow Olympiad qual-4 | E17 Queen's Indian |
| 5. R Cardoso vs Kostantinos Pavlatos |
| 1-0 | 38 | 1956 | Moscow Olympiad qual-4 | C84 Ruy Lopez, Closed |
| 6. H Platz vs R Cardoso |
| 0-1 | 39 | 1956 | Moscow Olympiad qual-4 | C19 French, Winawer, Advance |
| 7. R Cardoso vs J Jezek |
| 0-1 | 42 | 1956 | Moscow Olympiad qual-4 | B90 Sicilian, Najdorf |
| 8. N Velandia vs R Cardoso |
| 0-1 | 82 | 1956 | Moscow Olympiad qual-4 | E10 Queen's Pawn Game |
| 9. A Anastasopoulos vs R Cardoso |
| 0-1 | 59 | 1956 | Moscow Olympiad Final-C | A07 King's Indian Attack |
| 10. S Venkatraman vs R Cardoso |
| 0-1 | 43 | 1956 | Moscow Olympiad Final-C | A10 English |
| 11. R Cardoso vs Ian Middleton |
| ½-½ | 58 | 1956 | Moscow Olympiad Final-C | B56 Sicilian |
| 12. K O'Riordan vs R Cardoso |
| 0-1 | 21 | 1956 | Moscow Olympiad Final-C | C17 French, Winawer, Advance |
| 13. R Cardoso vs P Reissmann |
| 1-0 | 31 | 1956 | Moscow Olympiad Final-C | C97 Ruy Lopez, Closed, Chigorin |
| 14. W Folz vs R Cardoso |
| ½-½ | 36 | 1956 | Moscow Olympiad Final-C | C01 French, Exchange |
| 15. R Cardoso vs Mikhail Nazarian |
| 1-0 | 32 | 1956 | Moscow Olympiad Final-C | C97 Ruy Lopez, Closed, Chigorin |
| 16. Tserendagva vs R Cardoso |
| ½-½ | 87 | 1956 | Moscow Olympiad Final-C | A50 Queen's Pawn Game |
| 17. R Cardoso vs G Philippe |
| 1-0 | 16 | 1956 | Moscow Olympiad Final-C | B01 Scandinavian |
| 18. G Koshnitsky vs R Cardoso |
| 0-1 | 45 | 1956 | Australian Championship 1956/57 | D78 Neo-Grunfeld, 6.O-O c6 |
| 19. R Cardoso vs C Purdy |
| 1-0 | 28 | 1956 | Australian Championship 1956/57 | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 20. J Hanks vs R Cardoso |
| ½-½ | 67 | 1957 | Australian Championship 1956/57 | A22 English |
| 21. O Weber vs R Cardoso |
| 1-0 | 12 | 1957 | Australian Championship 1956/57 | D00 Queen's Pawn Game |
| 22. R Cardoso vs K Ozols |
| 0-1 | 36 | 1957 | Australian Championship 1956/57 | A89 Dutch, Leningrad, Main Variation with Nc6 |
| 23. R Cardoso vs O Sarapu |
| 0-1 | 60 | 1957 | Australian Championship 1956/57 | B95 Sicilian, Najdorf, 6...e6 |
| 24. R Cardoso vs J Aldrete Lobo |
| 1-0 | 33 | 1957 | World Junior Championship | C16 French, Winawer |
| 25. B Rabinowitz vs R Cardoso |
| ½-½ | 62 | 1957 | World Junior Championship | C00 French Defense |
Kibitzing
