| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Trompowsky vs R Cantero |
 | 1-0 | 17 |
1954 |
Montevideo | A45 Queen's Pawn Game |
| 2. Najdorf vs R Cantero |
 | 1-0 | 40 |
1954 |
Montevideo | E64 King's Indian, Fianchetto, Yugoslav System |
| 3. Eliskases vs R Cantero |
| 1-0 | 46 |
1956 |
Montevideo | E60 King's Indian Defense |
| 4. Najdorf vs R Cantero |
 | 1-0 | 44 |
1956 |
Montevideo | E60 King's Indian Defense |
| 5. R Cantero vs Najdorf |
| 0-1 | 39 |
1957 |
Sao Paulo | C44 King's Pawn Game |
| 6. R Cantero vs M Freitas |
| 1-0 | 44 |
1957 |
Sao Paulo | A11 English, Caro-Kann Defensive System |
| 7. R Cantero vs L Engels |
| 1-0 | 46 |
1957 |
Sao Paulo | D37 Queen's Gambit Declined |
| 8. F Aguado vs R Cantero |
| ½-½ | 11 |
1957 |
Sao Paulo | A72 Benoni, Classical without 9.O-O |
| 9. J Hollmann vs R Cantero |
| 1-0 | 46 |
1957 |
Sao Paulo | B32 Sicilian |
| 10. H Rossetto vs R Cantero |
| 1-0 | 45 |
1957 |
Sao Paulo | A53 Old Indian |
| 11. R Sanguineti vs R Cantero |
| 1-0 | 48 |
1957 |
Sao Paulo | C78 Ruy Lopez |
| 12. R Cantero vs H Zacharias |
| 1-0 | 35 |
1957 |
Sao Paulo | E80 King's Indian, Samisch Variation |
| 13. R Cantero vs J Ducas |
| 1-0 | 24 |
1957 |
Sao Paulo | A53 Old Indian |
| 14. R Cantero vs L Tavares Da Silva |
| 1-0 | 32 |
1957 |
Rio de Janeiro zt | E60 King's Indian Defense |
| 15. R Lisboa vs R Cantero |
| 0-1 | 46 |
1957 |
Sao Paulo | E67 King's Indian, Fianchetto |
| 16. M Eidelman vs R Cantero |
| 0-1 | 31 |
1957 |
Sao Paulo | B95 Sicilian, Najdorf, 6...e6 |
| 17. R Cantero vs Gligoric |
| 0-1 | 44 |
1960 |
Asuncion | B80 Sicilian, Scheveningen |
| 18. Szabo vs R Cantero |
| 1-0 | 34 |
1960 |
Asuncion | A71 Benoni, Classical, 8.Bg5 |
| 19. R Cantero vs G McCurdy |
| ½-½ | 15 |
1968 |
Lugano Olympiad | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 20. Hebden vs R Cantero |
 | 1-0 | 18 |
1986 |
Espoo | C34 King's Gambit Accepted |