Carl Ruben
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| DEN-ch | ??/??/1933 | 0 |  Denmark |
| Prague ol (Men) | 07/12/1931 | 0 |  Czech Republic |
| DEN-ch | ??/??/1930 | 0 | Denmark |
| Hamburg ol (Men) | 07/13/1930 | 0 |  Germany |
Carl Ruben Repertoire with White pieces (most played)
| ECO | Opening | Games |
| E16 | Queen's Indian, Capablanca variation | 2 games |
| A34 | English, symmetrical variation | 1 games |
| E11 | Bogo-Indian defence | 1 games |
| D45 | Queen's Gambit Declined semi-Slav, 5.e3 | 1 games |
Carl Ruben Repertoire with Black pieces (most played)
| ECO | Opening | Games |
| E32 | Nimzo-Indian, classical variation | 2 games |
| D03 | Torre attack (Tartakower variation) | 2 games |
| C01 | French, exchange variation | 1 games |
| D64 | Queen's Gambit Declined, Orthodox defence, Rubinstein attack (with Rc1) | 1 games |
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