J. Patt Rubinstein
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Rosario | ??/??/1952 | 0 | Argentina |
| Santa Fe | ??/??/1948 | 0 | United States |
| ARG-ch | ??/??/1947 | 0 | Argentina |
Most Played Openings as White
| ECO | Opening | Games |
| C51 | Evans gambit declined | 3 games |
| B07 | Pirc defence | 2 games |
| B59 | Sicilian, Boleslavsky variation, 7.Nb3 | 2 games |
| C11 | French defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C14 | French, classical variation | 2 games |
| E60 | King's Indian defence | 1 games |
| B55 | Sicilian, Prins variation, Venice attack | 1 games |
| A28 | English, four knights system | 1 games |


Argentina
United States