Go Seigen
Go Seigen is commonly considered to be among the best to have ever played go, and is frequently deemed to have been the best player of the 20th century. He dominated professional go for more than a quarter of a century. He maintained a brilliant match record and successively defeated all the leading players of the day in a series of notable jubango (contest between two players consisting of ten games), even forcing them down to handicaps. Some of the defeated were Kitani Minoru, Karigane Junichi, Hashimoto Utaro, Iwamoto Kaoru, Fujisawa Hosai, Sakata Eio, and Takagawa Kaku. Go lost just one jubango, and that was against Fujisawa Hosai. However, the match was played with Fujisawa taking the josen handicap throughout, and Fujisawa only managed to win with a score of 6 to 4. Some ten years later, Go Seigen took revenge on Fujisawa by beating him in two consecutive jubango with lopsided scores of 7-2 and 5-1 respectively. One must note that these jubango matches were all played without komi, and indeed the same applied to the vast majority of games Go Seigen played during his career. Go Seigen won the Oteai six times, and won a special Nihon Ki-in championship tournament in 1933.