As it happens, 1968 is the same year that Beth Harmon, the fictional heroine of the blockbuster Netflix series “The Queen’s Gambit,” was the only female competitor at a respected chess tournament set in Moscow. But during one scene at the tournament, a commentator remarked on how unusual it was that Harmon, a woman, was competing. Then he said: “There’s Nona Gaprindashvili, but she’s the female world champion and has never faced men.”