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Horst Rittner

Full name Horst Robert Rittner
Country Germany
Born July 16, 1930
Breslau, Germany (today Wrocław, Poland)
Title ICCF Gradmaster (1961)
ICCF World Champion 1968-71

Horst Robert Rittner (born July 16, 1930 in Breslau [formerly part of Germany but today in Poland, named Wrocław]) is a German correspondence chess Grandmaster. He is most famous for being the sixth ICCF World Champion between 1968 and 1971. He also edited the German magazine Schach.