Is Alpha Zero playing in the championship?

gzero maybe?

I've asked gzero_bot author to withdraw from the next championship (as it is clear, that it is the best) and he confirmed, that gzero will withdraw in this season.

You can still play gzero (unrated) via an invite.  If you send a PM, I can adjust the search time to vary strength.

Same goes for breakthrough, reversi (8&10), hex13 and c6.