 Heinz Wirthensohn

Heinz Wirthensohn (born 4 May 1951), is a Swiss chess International Master (1977), three-times Swiss Chess Championship winner (1979, 1981, 1992), European Team Chess Championship individual silver medal winner (1973).From the mid-1970s until the mid-1990s Heinz Wirthensohn was one of the leading Swiss chess players.