KaTrain

KaTrain is a graphical user interface for the KataGo AI.

It is in some ways similar to Lizzie, but has a larger focus on playing against AI. The program allows one to use KataGo for analyzing games, play against various artificially weakened versions ranging from 18k-5d, and has a teaching mode which can point out bad moves as you play.

The weakened bots are also occasionally available as opponents on OGS under the names 'katrain-*' and tutorials are available on YouTube.