| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. R Cardoso vs T Makelainen |
| 1-0 | 40 | 1957 | World Junior Championship | E10 Queen's Pawn Game |
| 27. V Selimanov vs R Cardoso |
| 1-0 | 41 | 1957 | World Junior Championship | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 28. R Cardoso vs M Gerusel |
 | 1-0 | 37 | 1957 | World Junior Championship | B29 Sicilian, Nimzovich-Rubinstein |
| 29. A Jongsma vs R Cardoso |
| 1-0 | 65 | 1957 | World Junior Championship | E62 King's Indian, Fianchetto |
| 30. R Cardoso vs Lombardy |
| 0-1 | 67 | 1957 | World Junior Championship | B92 Sicilian, Najdorf, Opocensky Variation |
| 31. R Cardoso vs P Bates |
| 1-0 | 25 | 1957 | World Junior Championship | B09 Pirc, Austrian Attack |
| 32. I Bahgat vs R Cardoso |
| 0-1 | 56 | 1957 | World Junior Championship | C31 King's Gambit Declined, Falkbeer Counter Gambit |
| 33. R Cardoso vs R Hallerod |
| 0-1 | 56 | 1957 | World Junior Championship | B95 Sicilian, Najdorf, 6...e6 |
| 34. F Jobin vs R Cardoso |
| 0-1 | 63 | 1957 | World Junior Championship | E81 King's Indian, Samisch |
| 35. Fischer vs R Cardoso |
 | 1-0 | 32 | 1957 | Fischer - Cardoso | A07 King's Indian Attack |
| 36. Fischer vs R Cardoso |
| 1-0 | 46 | 1957 | Fischer - Cardoso | B90 Sicilian, Najdorf |
| 37. Fischer vs R Cardoso |
| ½-½ | 46 | 1957 | Fischer - Cardoso | B90 Sicilian, Najdorf |
| 38. R Cardoso vs Fischer |
| ½-½ | 56 | 1957 | Fischer - Cardoso | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 39. R Cardoso vs Fischer |
| 0-1 | 52 | 1957 | Fischer - Cardoso | B98 Sicilian, Najdorf |
| 40. Fischer vs R Cardoso |
| 1-0 | 31 | 1957 | Fischer - Cardoso | B90 Sicilian, Najdorf |
| 41. R Cardoso vs Fischer |
| 1-0 | 40 | 1957 | Fischer - Cardoso | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 42. R Cardoso vs Fischer |
| 0-1 | 36 | 1957 | Fischer - Cardoso | B55 Sicilian, Prins Variation, Venice Attack |
| 43. Averbakh vs R Cardoso |
| ½-½ | 60 | 1958 | Portoroz Interzonal | A34 English, Symmetrical |
| 44. R Cardoso vs Larsen |
| ½-½ | 54 | 1958 | Portoroz Interzonal | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 45. R Sanguineti vs R Cardoso |
| ½-½ | 69 | 1958 | Portoroz Interzonal | C97 Ruy Lopez, Closed, Chigorin |
| 46. R Cardoso vs Panno |
| 0-1 | 57 | 1958 | Portoroz Interzonal | B90 Sicilian, Najdorf |
| 47. F Olafsson vs R Cardoso |
| 1-0 | 28 | 1958 | Portoroz Interzonal | B40 Sicilian |
| 48. R Cardoso vs Tal |
| ½-½ | 44 | 1958 | Portoroz Interzonal | B36 Sicilian, Accelerated Fianchetto |
| 49. Petrosian vs R Cardoso |
| 1-0 | 41 | 1958 | Portoroz Interzonal | E40 Nimzo-Indian, 4.e3 |
| 50. R Cardoso vs J Sherwin |
| 1-0 | 41 | 1958 | Portoroz Interzonal | D85 Grunfeld |
Kibitzing
