Hikaru no Go is a popular
Japanese anime and
manga based on the board game
Go.
Hikaru meets a master Go player ghost, Sai, who stays with Hikaru. Sai is a ghost because he died after he lost an important game at which his opponent cheated. Before Hikaru, Sai was with another legendary master Go player,
Honinbo Shusaku. Urged by Sai, Hikaru starts playing Go. His first match is with Touya Akira, who is the son of master Touya; Sai (playing through Hikaru) defeats him, and Akira starts seeing Hikaru as his rival in becoming a Go master. (To be written)