Hikaru No Go, Vol. 19, 19

After stumbling across a haunted go board, Hikaru Shindo discovers that the spirit of a master player named Fujiwara-no-Sai has taken up residence in his consciousness. Sai awakens in Hikaru an untapped genius for the game, and soon the schoolboy is chasing his own dream--defeating the famed go prodigy Akira Toya Hikaru is determined to move carefully, step by step, up the ladder of professional go. He pours his energy into it, striving to get closer to his ultimate goal--playing the Divine Move.

After many games he finally gets to play a 7-dan, who turns out to be someone he's confronted before, though not in competition. Their mutual animosity fires their competitiveness, pushing them to play with maximum intensity