Karl Ruben

Karl Ruben (4 August 1903 – 28 October 1938)^[1] was a Danish chess master.^[2]

He won a match against Johannes Pedersen (1.5–0.5) at Aalborg 1927,^[3] tied for 2nd-3rd in Danish Championship at Vordingborg 1927 (Erik Andersen won), shared 2nd at Copenhagen 1927 (Politiken, Géza Maróczy won),^[4] tied for 5-6th at Copenhagen 1928 (Aron Nimzowitsch won), tied for 7-9th at Svendborg 1930 (DEN-ch, Andersen won),^[5] and won a simultan game against Alexander Alekhine at Copenhagen 1930.^[6]

Ruben played four times for Denmark in Chess Olympiads in 1927, 1928, 1930, 1931, and won team silver medal at London 1927.^[7]