Koyo Toya Retires!
The Go World goes into a state of shock after Toya Meijin announces that he is retiring as Professional Go player. As everyone tries to find out why Koyo has given up his titles and his status, Akira begins to worry about Hikaru's progress.
Aired 27/11/2002EP 59 - Koyo Toya Retires!

2001
Hikaru no Go
With a two-tone hairstyle and a streak of immaturity, Hikaru Shindou finds an old Go board with a hidden surprise - trapped within the Go Board is Fujiwara-no-Sai, the ghost of an ancient Go master! In the blink of an eye, Sai becomes part of Hikaru's consciousness and soon begins to learn the true essence behind this ancient game of skill and strategy.
(Source: VIZ Media)