Checking the King (1972)

Two men in a game of chess. One of the players is a country boy who accidentally discovered a chess talent, and the other is a former lawyer who has not played chess for twenty years. The lawyer tells the story of learning to play chess: during World War II, he was arrested for no reason and imprisoned. One day, while waiting for another interrogation, he stole the book "Chess Review" from the investigating officer's coat. He perfected it for several months and started playing against himself. The intense mental effort led him to a nervous breakdown eventually...