Career
In September 1935, he played at a match Sweden vs Germany (Scheveningen system) in Zoppot (Sopot). Danielsson represented Sweden in Chess Olympiads:
In 1935, at fourth board in the 6th Chess Olympiad in Warsaw (+12 -1 =6)
In 1936, at fourth board in 3rd unofficial Chess Olympiad in Munich (+9 -2 =9)
In 1937, at fourth board in 7th Chess Olympiad in Stockholm (+12 -2 =4)
In 1939, at fourth board in 8th Chess Olympiad in Buenos Aires (+7 -3 =5)
In 1952, at second reserve board in 10th Chess Olympiad in Helsinki (+1 -2 =3).