| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. A Liebstein vs R Garcia Vera |
| 0-1 | 49 | 1944 | Mar del Plata | B80 Sicilian, Scheveningen |
| 27. Pilnik vs A Liebstein |
| 1-0 | 34 | 1944 | Mar del Plata | D30 Queen's Gambit Declined |
| 28. A Liebstein vs G Puiggros |
| 0-1 | 44 | 1944 | Mar del Plata | C47 Four Knights |
| 29. B H Villegas vs A Liebstein |
| ½-½ | 47 | 1944 | Mar del Plata | A28 English |
| 30. A Liebstein vs J Traian Iliesco |
| 1-0 | 36 | 1944 | Mar del Plata | B45 Sicilian, Taimanov |
| 31. P Michel vs A Liebstein |
| 1-0 | 96 | 1944 | Mar del Plata | C73 Ruy Lopez, Modern Steinitz Defense |
| 32. A Liebstein vs J Pelikan |
| ½-½ | 42 | 1944 | Mar del Plata | B72 Sicilian, Dragon |
| 33. C Guimard vs A Liebstein |
| 1-0 | 42 | 1944 | Mar del Plata | E11 Bogo-Indian Defense |
| 34. A Liebstein vs R Flores Alvarez |
| 0-1 | 47 | 1944 | Mar del Plata | C78 Ruy Lopez |
| 35. A Liebstein vs H Rossetto |
| 0-1 | 65 | 1944 | Mar del Plata | C78 Ruy Lopez |
| 36. M Luckis vs A Liebstein |
| 0-1 | 96 | 1944 | Mar del Plata | D11 Queen's Gambit Declined Slav |
| 37. A Liebstein vs E Reed Valenzuela |
| 1-0 | 41 | 1944 | Mar del Plata | C84 Ruy Lopez, Closed |
| 38. Najdorf vs A Liebstein |
 | 1-0 | 48 | 1944 | Mar del Plata | D19 Queen's Gambit Declined Slav, Dutch |
| 39. Stahlberg vs A Liebstein |
| 1-0 | 52 | 1944 | Mar del Plata | D51 Queen's Gambit Declined |
| 40. A Liebstein vs R Schroeder |
| 1-0 | 60 | 1951 | Mar del Plata Zonal | C62 Ruy Lopez, Old Steinitz Defense |
| 41. F Vasconcellos vs A Liebstein |
| 1-0 | 42 | 1951 | Mar del Plata Zonal | C65 Ruy Lopez, Berlin Defense |
| 42. A Liebstein vs L Bauza |
| ½-½ | 31 | 1951 | Mar del Plata Zonal | C99 Ruy Lopez, Closed, Chigorin, 12...cd |
| 43. H Rossetto vs A Liebstein |
| ½-½ | 82 | 1951 | Mar del Plata Zonal | E01 Catalan, Closed |
| 44. A Liebstein vs J de Souza Mendes |
| 1-0 | 28 | 1951 | Mar del Plata Zonal | B58 Sicilian |
| 45. Letelier vs A Liebstein |
| 1-0 | 41 | 1951 | Mar del Plata Zonal | C50 Giuoco Piano |
| 46. A Liebstein vs R Flores Alvarez |
| ½-½ | 51 | 1951 | Mar del Plata Zonal | B92 Sicilian, Najdorf, Opocensky Variation |
| 47. E Reinhardt vs A Liebstein |
| ½-½ | 73 | 1951 | Mar del Plata Zonal | D18 Queen's Gambit Declined Slav, Dutch |
| 48. A Liebstein vs N Dantas |
| 1-0 | 38 | 1951 | Mar del Plata Zonal | C50 Giuoco Piano |
| 49. C H Maderna vs A Liebstein |
| 1-0 | 67 | 1951 | Mar del Plata Zonal | C53 Giuoco Piano |
| 50. A Liebstein vs M Luckis |
| 1-0 | 78 | 1951 | Mar del Plata Zonal | B12 Caro-Kann Defense |
Kibitzing
