Even in 2021, there’s an enormous gulf dividing men and women in chess, according to The Conversation. The reasons for this are complicated, but certainly, sexism has played a role, and it certainly played a role in competitive chess in the 1950s and 1960s, when “The Queen’s Gambit” took place.

This sexism in chess informed a throwaway line in the series. To set the scene, the protagonist was competing at a top-level tournament in Russia, while a narrator was giving the radio audience some context, specifically about the lack of women in chess at the time. “The only unusual thing about [Beth Harmon], really, is her sex, and even that’s not unique in Russia. There’s Nona Gaprindashvili, but she’s the female world champion and has never faced men,” the narrator said.

Gaprindashvili, however, had indeed competed against men by 1968, according to Yahoo! News, the time in which the fictitious scene took place. And in her lawsuit, she claimed that this bit of fudging historical fact defamed her and her accomplishments. “[Netflix] brazenly and deliberately lied [about Gaprindashvili for the] cheap and cynical purpose of ‘heightening the drama,'” the suit alleges.

Netflix, in its response, claimed to have the “utmost respect” for the Georgian chess player, but promised to defend against this lawsuit “vigorously.”