The story that Man 1 (Peter Carroll) recounts is "The Thirtieth Year", the title story from a collection of short stories by Ingeborg Bachmann, an Austrian poet/ writer. The collection was published on 1961.
The position of the game of Go used by the lecturer as an example is from a championship match of 1938 between master Shusai Meijin and challenger Kitani Minoru. The game was made known by a Nobel prizewinning writer Kawabata in his book "The Master of Go". The lecturer asks what possibly could cause the Master to make the fatal mistake on move 130. A likely answer is that the Shusai was overcome with anger at his opponent earlier using Shusai's own tricks against him, and emotion took over his reason prompting him to make a hasty move.