| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. L Marini vs A Liebstein |
| ½-½ | 92 | 1951 | Mar del Plata Zonal | D45 Queen's Gambit Declined Semi-Slav |
| 52. A Liebstein vs J Mangini |
| 1-0 | 24 | 1951 | Mar del Plata Zonal | B70 Sicilian, Dragon Variation |
| 53. F Pinzon vs A Liebstein |
| 0-1 | 56 | 1951 | Mar del Plata Zonal | D52 Queen's Gambit Declined |
| 54. A Liebstein vs Bolbochan |
| 0-1 | 70 | 1951 | Mar del Plata Zonal | B95 Sicilian, Najdorf, 6...e6 |
| 55. J Sumar vs A Liebstein |
| 1-0 | 35 | 1951 | Mar del Plata Zonal | C53 Giuoco Piano |
| 56. A Liebstein vs A Esposito |
| 0-1 | 33 | 1951 | Mar del Plata Zonal | C03 French, Tarrasch |
| 57. B Wexler vs A Liebstein |
| ½-½ | 42 | 1951 | Mar del Plata Zonal | A07 King's Indian Attack |
| 58. A Liebstein vs Eliskases |
 | 0-1 | 48 | 1951 | Mar del Plata Zonal | B73 Sicilian, Dragon, Classical |
| 59. C Guimard vs A Liebstein |
| ½-½ | 21 | 1951 | Mar del Plata Zonal | D11 Queen's Gambit Declined Slav |
| 60. A Liebstein vs P Martin |
| 0-1 | 63 | 1951 | Mar del Plata Zonal | C82 Ruy Lopez, Open |
| 61. J Bolbochan vs A Liebstein |
| 1-0 | 59 | 1951 | Mar del Plata Zonal | D48 Queen's Gambit Declined Semi-Slav, Meran |
Kibitzing
