| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. F Casas vs Eliskases |
| 0-1 | 35 | 1959 | ARG | E81 King's Indian, Samisch |
| 52. F Casas vs Korchnoi |
| ½-½ | 42 | 1960 | Santa Fe | D91 Grunfeld, 5.Bg5 |
| 53. F Casas vs Szabo |
| ½-½ | 86 | 1960 | Santa Fe | A53 Old Indian |
| 54. Taimanov vs F Casas |
| 1-0 | 26 | 1960 | Santa Fe | A71 Benoni, Classical, 8.Bg5 |
| 55. F Casas vs Gligoric |
 | 0-1 | 33 | 1960 | Santa Fe | D72 Neo-Grunfeld, 5.cd, Main line |
| 56. M A Casabella vs F Casas |
| ½-½ | 42 | 1960 | Santa Fe | D95 Grunfeld |
| 57. F Casas vs H Rossetto |
| 1-0 | 39 | 1960 | Santa Fe | C79 Ruy Lopez, Steinitz Defense Deferred |
| 58. J Klein vs F Casas |
| 1-0 | 38 | 1960 | Santa Fe | A87 Dutch, Leningrad, Main Variation |
| 59. F Casas vs A Foguelman |
| 1-0 | 49 | 1961 | ARG-ch | D91 Grunfeld, 5.Bg5 |
| 60. F Casas vs O Bazan |
| 0-1 | 43 | 1961 | ARG-ch | A02 Bird's Opening |
| 61. F Casas vs R Garcia |
| 1-0 | 34 | 1963 | Buenos Aires Circulo Argentino | A69 Benoni, Four Pawns Attack, Main line |
| 62. B Marcussi vs F Casas |
| 0-1 | 24 | 1963 | Buenos Aires Circulo Argentino | B48 Sicilian, Taimanov Variation |
| 63. F Casas vs R C Cruz |
| ½-½ | 32 | 1963 | Buenos Aires Circulo Argentino | E92 King's Indian |
| 64. R Sanguineti vs F Casas |
| 1-0 | 24 | 1963 | Buenos Aires Circulo Argentino | D67 Queen's Gambit Declined, Orthodox Defense, Bd3 line |
| 65. F Casas vs H Rossetto |
| 1-0 | 33 | 1963 | Buenos Aires Circulo Argentino | E92 King's Indian |
| 66. A Esposito vs F Casas |
| ½-½ | 43 | 1963 | Buenos Aires Circulo Argentino | A34 English, Symmetrical |
| 67. F Casas vs Panno |
| 1-0 | 41 | 1963 | Buenos Aires Circulo Argentino | E94 King's Indian, Orthodox |
| 68. F Casas vs C Amado |
| 0-1 | 39 | 1963 | Buenos Aires Circulo Argentino | D34 Queen's Gambit Declined, Tarrasch |
| 69. E Scanavino vs F Casas |
| 0-1 | 27 | 1963 | Buenos Aires Circulo Argentino | E89 King's Indian, Samisch, Orthodox Main line |
| 70. F Casas vs S Schweber |
| 1-0 | 68 | 1963 | Buenos Aires Circulo Argentino | E38 Nimzo-Indian, Classical, 4...c5 |
| 71. C Bielicki vs F Casas |
| 1-0 | 67 | 1963 | Buenos Aires Circulo Argentino | E24 Nimzo-Indian, Samisch |
| 72. F Casas vs J Pelikan |
| 1-0 | 36 | 1972 | Buenos Aires | A89 Dutch, Leningrad, Main Variation with Nc6 |
| 73. J Szmetan vs F Casas |
| 0-1 | 41 | 1972 | ARG-ch | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 74. F Casas vs X Maldonado |
| 1-0 | 40 | 1972 | ARG-ch qual-B | E38 Nimzo-Indian, Classical, 4...c5 |
| 75. L Schmid vs F Casas |
| 1-0 | 41 | 1973 | Mar del Plata op | C93 Ruy Lopez, Closed, Smyslov Defense |
Kibitzing
