He shared 1st at St. Gallen 1901 (Swiss Chess Championship) and became a co-champion.Name Index to Jeremy Gaige's Chess Tournament Crosstables, An Electronic Edition, Anders Thulin, Malmö, 2004-09-01 He tied for 16-17th in the Mannheim 1914 chess tournament (the 19th DSB Congress, Hauptturnier A, Hallegua won), and tied for 7-8th at Hannover 1926 (Aron Nimzowitsch won). Dr. Hans Duhm was five-time Lower Saxony Champion (Der Niedersächsische Schachverband, 1924, 1925, 1927, 1928, and 1929).
