Botvinnik interview from 1983, when he was at the computer chess world championship in New York:
>When [Karpov] became World Champion he was able to force almost all of the Soviet Union's most creative chess players to work for him. If some master was famous for his ideas in the field of openings, he was summoned to the team or given an individual task to write a report on a given subject. It goes without saying that all this was kept top secret. In short, Karpov took on the role of exploiter of the ideas of others. There's no question that his talent allows him to use these ideas skillfully, but he himself is infertile, like a spayed bitch.