Nikolai Vladimirovich Krogius is a Russian chess International Grandmaster and psychologist. He was born on July 22, 1930, in Saratov. Krogius took third place in the 1951 and 1955 USSR Championships which helped secure his place as an International Master in 1954, and later achieving the grandmaster title in 1962.
He served as an arbiter for several major matches and tournaments including the controversial 1972 World Chess Championship match between Boris Spassky and Bobby Fischer. From 1994 to 1996, he acted as vice president of the International Chess Federation (FIDE), where he was actively involved in controversial matters like the 1993 PCA World Championship match between Garry Kasparov and Nigel Short.
As an author, his book "Psychology in Chess" combines his experience in both fields, psychology and chess, providing insights into the psychological aspects of the game.
In his later years, Krogius began a second career as a psychologist, using his experience in chess to understand human behavior. He's particularly interested in the problems of concentration, self-control, and anxiety in high-stress situations.