| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. R Cassidy vs Schneider |
| ½-½ | 21 |
1966 |
Havana ol final-C | A95 Dutch, Stonewall |
| 2. R Cassidy vs L Suarez |
| ½-½ | 17 |
1966 |
Havana ol final-C | E91 King's Indian |
| 3. R Cassidy vs Letelier |
| 0-1 | 40 |
1966 |
Havana ol final-C | A43 Old Benoni |
| 4. R Cassidy vs P Kroon |
| 0-1 | 70 |
1966 |
Havana ol prelim | A56 Benoni Defense |
| 5. R Cassidy vs O Yepez Obando |
| ½-½ | 27 |
1966 |
Havana ol final-C | E92 King's Indian |
| 6. J L Alvarez del Monte vs R Cassidy |
| ½-½ | 17 |
1966 |
Havana ol final-C | C42 Petrov Defense |
| 7. J Enevoldsen vs R Cassidy |
| 1-0 | 29 |
1966 |
Havana ol prelim | B01 Scandinavian |
| 8. Salvador Diaz vs R Cassidy |
| 1-0 | 24 |
1966 |
Havana ol final-C | B06 Robatsch |
| 9. R Belkadi vs R Cassidy |
| 1-0 | 33 |
1966 |
Havana ol final-C | B09 Pirc, Austrian Attack |
| 10. R Cassidy vs C Boutteville |
| ½-½ | 41 |
1966 |
Havana ol prelim | E17 Queen's Indian |
| 11. R Cassidy vs J M Ribeiro |
| 0-1 | 40 |
1966 |
Havana ol final-C | D32 Queen's Gambit Declined, Tarrasch |
| 12. E De Castro vs R Cassidy |
| ½-½ | 22 |
1966 |
Havana ol final-C | D53 Queen's Gambit Declined |
| 13. R Cassidy vs Eugenio Larrain Cadaiz |
| ½-½ | 30 |
1966 |
Havana ol prelim | A63 Benoni, Fianchetto, 9...Nbd7 |
| 14. R Cassidy vs N Ornithopoulos |
| 1-0 | 88 |
1966 |
Havana ol final-C | E91 King's Indian |
| 15. Panno vs R Cassidy |
| 1-0 | 26 |
1966 |
Havana ol prelim | E68 King's Indian, Fianchetto, Classical Variation, 8.e4 |
| 16. Teschner vs R Cassidy |
| 1-0 | 34 |
1967 |
EU-chT (prelim) | C73 Ruy Lopez, Modern Steinitz Defense |
| 17. Pedersen vs R Cassidy |
| 1-0 | 34 |
1967 |
EU-chT (prelim) | C47 Four Knights |
| 18. R Cassidy vs Teschner |
| 0-1 | 27 |
1967 |
EU-chT (prelim) | E24 Nimzo-Indian, Samisch |
| 19. R Cassidy vs Pedersen |
| ½-½ | 25 |
1967 |
EU-chT (prelim) | A62 Benoni, Fianchetto Variation |
| 20. R Cassidy vs M F Fye Chan |
| 0-1 | 36 |
1972 |
Skopje ol (Men) prelim | A56 Benoni Defense |
| 21. Ojanen vs R Cassidy |
| ½-½ | 17 |
1972 |
Skopje ol (Men) final-C | A28 English |
| 22. R Cassidy vs Kwan Nam Seng |
| 1-0 | 24 |
1972 |
Skopje ol (Men) prelim | A16 English |
| 23. R Cassidy vs T Takahashi |
| 0-1 | 41 |
1972 |
Skopje ol (Men) final-C | D38 Queen's Gambit Declined, Ragozin Variation |
| 24. A Kaldor vs R Cassidy |
| 1-0 | 41 |
1972 |
Skopje ol (Men) prelim | E58 Nimzo-Indian, 4.e3, Main line with 8...Bxc3 |
| 25. A Flatow vs R Cassidy |
| ½-½ | 24 |
1972 |
Skopje ol (Men) final-C | C01 French, Exchange |