Of those, 15 entered the Chigorin Club—the list of those players who’ve defeated a reigning world champion at classical time controls, with those who go on to become world champions themselves traditionally subsequently excluded—by beating Magnus (Fabi, Levon, Naka, and Raja had beaten Anand when he was WC, and Anand and Kramnik had long since entered and then left the club, o/c); that ... More @Wikipedia
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