The last 2 chapters are missing. There's an epilogue. The first of the two, is about Sai's pov when young Hikaru fights Akira, then it cuts to after the last tournament, and teenager Akira entering his father's Go salon and talking with everyone about Hikaru and that they couldn't underestimate him anymore. (Hikaru also beat Su Young after the tourney). Then Hikaru enters the salon and asks Akira to practice with him for the Itosisi tournament.
The next chapter is about two young Inseis, one admires Akira (Rui) and the other admires Hikaru (Oka). They are both rivals and they are fighting about which of their idols is better. They are also chosen to compete in the Itosisi tournament, and they get shocked when they find out their matchups: Rui gets paired with Hikaru, and Oka gets paired with Akira.
At the day of the tournament they are both nervous, and excited, yet obviously both lose. However, both have become impressed with their match. Now Rui admires Hikaru, and now Oka admires Akira. The series ends with Akira fighting Hikaru once again, and the two kids watching.
Where you can read this? Well, I read it on a certain manga site with a fox logo.