Marion Tinsley (February 3, 1927 – April 3, 1995) is considered the greatest checkers player who ever lived. He was world champion from 1955–1958 and 1975–1991. Tinsley never lost a World Championship match, and lost only seven games (two of them to the Chinook computer program) in his entire 45 year career. He withdrew from championship play during the years 1958–1975, relinquishing the title during that time.
Read more about Marion Tinsley: Vs. Chinook, Education, Television Appearances, World Championship Titles