Ulf Andersson (born 27 June 1951) is a leading Swedish chess player. FIDE awarded him the International Master title in 1970 and the Grandmaster title in 1972. Chess career. At his peak, Andersson reached number four on the FIDE rating list. Tournaments which he has won or shared first include the 1969 Swedish Chess Championship, Göteborg 1971, Dortmund 1973, Camagüez 1974, Cienfuegos 1975, Belgrade 1977, Buenos Aires 1978, Hastings 1978–79, Phillips & Drew 1980, Johannesburg 1981, Phillips & Drew 1982, Turin 1982, Wijk aan Zee 1983, Reggio Emilia 1985, Rome 1985, and Rome 1986.
https://en.wikipedia.org/wiki/Ulf_Andersson