I recently released a new version of KaTrain, a program which uses the full power of KataGo for reviewing and playing teaching games. It includes 10+ AI options of a wide range of strengths, and is aimed at showing you the moves where you actually lost the most points.
This release includes a new feature to download the very latest 20b/30b/40b KataGo models as well as Chinese and Spanish translations. Special thanks to the Spanish OGS community for helping with a last-minute help!
See an overview of the latest features in a video by my contributor Matthew here:
Check out the windows installers and instructions for installing on other OS here