Seo Neung-uk (서능욱, 徐能旭, born in 1958), achieved the rank of 9 dan Korean professional in 1990. He is popular for his ambitious style on the board. Commentator of New Haengma Dictionary volume 5 of a series of 12. He commented volumes 1, 2, 5, 6, 8, and 9 of the series. The other volumes are by Yang Jaeho.
Seo's carreer's record is at this Italian blog.
Also known for teaching how to play handicap-games