Felix Dueball (1880-1970) was a German Go player.
In 1964 Dueball was the co-recipient of the Japanese Okura Prize, which is given for contributions towards dissemination and promotion of Go.
His son, Fritz Dueball (around European 2-dan, 3 times European Champion (1957-1959), playing in Berlin, in the small Weddinger Go Club), and late (2002) grandson Jürgen Dueball (5 dan, European Go vice-champion and Chess professional: in the year 1985 he had an ELO of 2574 which was nr. 92 World Rank (refers to the player's world rank on that date) were Go and Bridge players too.
Three generations spanning the time from Oscar Korschelt to the 3rd millennium, all involved in Go.
History of Go in Europe 1880-1945 - Site seems not to exist anymore. Should be replaced by active source.
18.03.1930: Emanuel Lasker - Felix Dueball Dead link
07.06.1930: Felix Dueball - Honinbo Shusai
tderz: Emanuel Lasker is at the left, to the right is Felix Dueball.
I played more than 50 years later with Fritz Dueball (the boy in the picture) when we were both member of the Weddinger Go Club in Berlin. He was 2d then, and me an eagerly learning student.
anon Just a correction: Jürgen Dueball's FIDE rating in 1985 was 2445 (see http://www.olimpbase.org/Elo/player/Dueball,%20Juergen.html). This is quite a good rating but only made him around 286th in the world at the time (see http://www.olimpbase.org/Elo/Elo198507e.html).