It was widely believed that these schools actually existed. Whether they did or not, I do not know.
During my first visit to the Soviet Union in 1977 I met a girl who fit this description almost perfectly. I met her in Yerevan, Armenia. She spoke English so perfectly that I could not imagine that she was not American. She knew everything about America. She was about 20 years old. She accompanied me everywhere I went for three or four days. She waited outside my hotel for me, which was the Hotel Armenia, every morning. She said that she was a graduate from the Foreign Language Institute in Moscow and her teachers had been American. This explained her perfect accent. She had never been outside of the Soviet Union.
I do not even remember her name, except that she was beautiful and she DID NOT play chess. During that same visit to Armenia I met two other girls who were strong chess players (but who did not speak much English) and I was much more interested in them.
Was this girl I met a budding KGB agent? I do not know. Probably she was not but it made me a bit nervous to be spending time with a girl in the Soviet Union who spoke English as well as I do. I never even tried to get her into bed.
Sam Sloan