Nikolái Krogius

Nikolái Krogius was a distinguished Soviet chess grandmaster and psychologist, who played a significant role in the chess world during the mid-20th century. Known for his intellectual approach to the game, he was a notable competitor and respected figure among fellow grandmasters, including Víktor Korchnói. However, his relationship with Korchnói soured after the latter's defection in 1976, leading Krogius to become one of his fiercest opponents in the political and chess arenas.