Claim: Ralf Lau began his chess career in Bremen and played for Delmenhorster Sk (a German chess club) in the 1970's.
Evidence: Ralf Lau (born 19 October 1959 in Bremen) is a German Chess Grandmaster. Ralf Lau began his chess career in his hometown of Bremen. He played for Delmenhorster SK During the mid-1970s, he participated several times in the finals of the German team championship with them.