Career
He also participated in official Chess Olympiads at London 1927, Prague 1931, and Amsterdam 1954. Zimmermann had his best results in the 1920s, when he tied for 2nd-3rd at Neuchâtel 1922, took 3rd at Bern 1923, shared 1st at Margate 1923 (B tournament), tied for 10-11th at Zurich 1925, took 2nd at Geneva 1926, and took 6th at Basel 1928. After World World War II, he played in several friendly matches: Switzerland versus
France (1946), versus
Argentina (1950), versus Belgium (1950), versus West Germany (1952). He shared 3rd at Zurich Seniors 1962.