Guksu

The Guksu was a Go competition in South Korea. It was held 59 times beginning in 1956, and was discontinued in 2016.

Outline

The Guksu was a Go competition held by the Hanguk Kiwon, and sponsored by The Dong-a Ilbo. Guksu literally means 'hand of the nation', or essentially the best player in the country. It was the longest-running Korean Go competition. Each year, a tournament was held to determine a challenger, who would play against the defending champion.
When the competition was last held, the winner's prize was 45 million won, and the runner-up's prize was 15 million won.