Carl Ruben
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| DEN-ch | ??/??/1933 | 0 |  Denmark |
| Prague ol (Men) | 07/12/1931 | 0 |  Czech Republic |
| Copenhagen clock sim | 04/??/1930 | 0 | Denmark |
| Hamburg ol (Men) | 07/13/1930 | 0 |  Germany |
Most Played Openings as White
| ECO | Opening | Games |
| E16 | Queen's Indian, Capablanca variation | 2 games |
| D11 | Queen's Gambit Declined Slav, 3.Nf3 | 1 games |
| A40 | Queen's pawn | 1 games |
| D18 | Queen's Gambit Declined Slav, Dutch variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D03 | Torre attack (Tartakower variation) | 2 games |
| E32 | Nimzo-Indian, classical variation | 2 games |
| B18 | Caro-Kann, classical variation | 1 games |
| E38 | Nimzo-Indian, classical, 4...c5 | 1 games |
