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Calvin Blocker

Calvin Blocker (on right) giving a simultaneous exhibition in Akron, Ohio
Country United States
Born June 2, 1955
Cleveland, Ohio
Title International Master
Peak rating 2435 (January 1979)

Calvin Barry Blocker (born 1955 in Cleveland, Ohio) is an International Master of chess. He is the Ohio state record holder for simultaneous games, having amassed 110 wins and 6 draws in a single exhibition, and has won numerous Ohio Chess Championships. He has also coached several high profile chess players, including Marc Esserman.