Doteki
Ogawa Doteki (道的 1669-1690), pupil of, and heir to, Dosaku; but died young at the age of 21. At the age of 13 he already was a 6 dan, He is considered the most gifted prodigy in the history of the game. At the age of 15 he became heir to the House of Honinbo and the next year began playing Castle Games, rising to the level of Jozu (7 dan), and awarded a ten-fold monetary allotment from the government.
A game of his against Dosaku is given in Appreciating Famous Games.
"Doteki's skill was almost equal to that of the Meijin and one day he played two games againts Dosaku simply taking Black. He won both by 1 point". Appreciating Famous Games
In an interview, Go Seigen said that he was the greatest genius in the history of the game. ( British Go Journal)