Allan Nilsson (18 May 1899 – 4 September 1949) was a Swedish chess master. Nilsson was born in Gothenburg. He was Swedish champion in 1924–1929, and played four matches for the title, all in Gothenburg. He drew a match with Gustaf Nyholm (2.5 : 2.5) in 1921, won against Nyholm (3 : 1) in 1924, drew with Gösta Stoltz (2.5 : 2.5) in 1927, and lost to Gideon Ståhlberg (0 : 3) in 1929. He tied for 2nd-3rd, behind Paul Johner, at Göteborg 1920, shared 1st with Anton Olson at Uppsala 1923, and took 3rd at Copenhagen 1924 (Nordic Championship, Aron Nimzowitsch won).
https://en.wikipedia.org/wiki/Allan_Nilsson