| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. R Cardoso vs B Pytel |
| ½-½ | 46 | 1970 | Sofia (Women) | A82 Dutch, Staunton Gambit |
| 27. R Cardoso vs V Shikova |
| ½-½ | 38 | 1970 | Sofia (Women) | E83 King's Indian, Samisch |
| 28. C Lehmann vs R Cardoso |
| 0-1 | 47 | 1970 | Sofia (Women) | C89 Ruy Lopez, Marshall |
| 29. R Cardoso vs Z Makai |
| ½-½ | 17 | 1970 | Sofia (Women) | C75 Ruy Lopez, Modern Steinitz Defense |
| 30. P Todorova vs R Cardoso |
| ½-½ | 33 | 1970 | Sofia (Women) | A44 Old Benoni Defense |
| 31. R Cardoso vs L Barczay |
| ½-½ | 27 | 1970 | Reggio Emilia 1970/71 | B41 Sicilian, Kan |
| 32. Benko vs R Cardoso |
| 1-0 | 29 | 1970 | Reggio Emilia 1970/71 | C45 Scotch Game |
| 33. R Cardoso vs M Mihaljcisin |
| 0-1 | 32 | 1970 | Reggio Emilia 1970/71 | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
| 34. E Paoli vs R Cardoso |
 | 1-0 | 48 | 1970 | Reggio Emilia 1970/71 | C50 Giuoco Piano |
| 35. R Cardoso vs M Czerniak |
| 0-1 | 54 | 1970 | Reggio Emilia 1970/71 | A42 Modern Defense, Averbakh System |
| 36. Y Mashian vs R Cardoso |
| 1-0 | 29 | 1970 | Reggio Emilia 1970/71 | A44 Old Benoni Defense |
| 37. R Cardoso vs M Damjanovic |
| 0-1 | 43 | 1971 | Reggio Emilia 1970/71 | A37 English, Symmetrical |
| 38. A Soltis vs R Cardoso |
| 1-0 | 30 | 1971 | Reggio Emilia 1970/71 | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 39. R Cardoso vs T Trincardi |
| 0-1 | 43 | 1971 | Reggio Emilia 1970/71 | E63 King's Indian, Fianchetto, Panno Variation |
| 40. R Cardoso vs Parma |
| 0-1 | 28 | 1971 | Reggio Emilia 1970/71 | A46 Queen's Pawn Game |
| 41. T Ghitescu vs R Cardoso |
| 1-0 | 31 | 1971 | Reggio Emilia 1970/71 | A35 English, Symmetrical |
| 42. R Cardoso vs U Masera |
| 0-1 | 29 | 1971 | Reggio Emilia 1970/71 | C64 Ruy Lopez, Classical |
| 43. L Popov vs R Cardoso |
| 1-0 | 32 | 1971 | Reggio Emilia 1970/71 | E17 Queen's Indian |
| 44. R Cardoso vs R Cosulich |
| 1-0 | 24 | 1971 | Reggio Emilia 1970/71 | C01 French, Exchange |
| 45. L Mista vs R Cardoso |
| 1-0 | 35 | 1971 | Reggio Emilia 1970/71 | E14 Queen's Indian |
| 46. Timman vs R Cardoso |
| 1-0 | 26 | 1971 | 11th Costa del Sol | A00 Uncommon Opening |
| 47. R Cardoso vs Ljubojevic |
| 0-1 | 31 | 1971 | 11th Costa del Sol | B03 Alekhine's Defense |
| 48. R Cardoso vs Quinteros |
| ½-½ | 28 | 1971 | 11th Costa del Sol | B32 Sicilian |
| 49. K Rogoff vs R Cardoso |
| 1-0 | 25 | 1971 | 11th Costa del Sol | C96 Ruy Lopez, Closed |
| 50. R Cardoso vs B Huguet |
| 0-1 | 42 | 1971 | 11th Costa del Sol | E12 Queen's Indian |
Kibitzing
