After the war, Bogoljubow won many international tournaments; at Berlin 1919,
Stockholm 1919,
Kiel 1921, and
Pistyan (Pieštany) 1922. He tied for 1st–3rd at Karlsbad (
Karlovy Vary) 1923. He sent his winnings from Pistyan to Triberg, where his wife used them to buy a house. The Bogoljubows made an income by renting rooms to tourists and visitors. He also won at Breslau (
Wrocław) 1925, and in
Moscow, ahead of a field which included
Emanuel Lasker and
José Raúl Capablanca. This made him the only player to ever become both German and Soviet champion in the same year. Bogoljubow represented Germany at first board in the
4th Chess Olympiad at Prague 1931, winning the individual silver medal (+9−1=7). In 1930, Bogoljubow twice tied for 2nd–3rd with Nimzowitsch, after Alekhine, in
Sanremo; then with
Gösta Stoltz, behind
Isaac Kashdan, in Stockholm. In 1931, he tied for 1st–2nd in
Swinemünde (27th DSB Congress). In 1933, Bogoljubow won in
Bad Pyrmont (1st GER-ch). In 1935, he won at
Bad Nauheim, and
Bad Saarow. Bogoljubow tied for 1st–2nd at Berlin 1935,
Bad Elster 1936, Bad Elster 1937. Bogoljubow won at
Bremen 1937, Bad Elster 1938, and
Stuttgart 1939 (the 1st
Europaturnier). When the Nazis came to power in 1933, Bogoljubow was no longer allowed to play for the German national team or in German championships. His situation was not helped even after he joined the Nazi party in 1938, so that his daughters would be allowed to study at university. Nonetheless, he coached the German national team for the 1936 (unofficial) and 1939 Chess Olympiads. Accounts of Bogoljubow's opinion of the Nazis differ between sources.
Hans Kmoch claims that he insisted to play with the swastika flag at Zandvoort 1936, but
Fedor Bogatyrchuk claimed that he did not like to wear it, and that Bogoljubow was "only formally" a member of the Nazi party. Bogatyrchuk is quoted by Bogoljubow's biographer, Sergei Soloviov, as saying: "It was not a secret at all that E.D. [Bogoljubow] did not like the Bolsheviks, but I think only a few people knew that he was treating Hitler's wild ideas with at least equal revulsion and contempt." ==World War II and after==