KaTrain

KaTrain helps Go players train with KataGo to improve their Baduk skills.

github.com/sanderland/katrain
KaTrain homepage screenshot

About KaTrain

KaTrain is a tool for analyzing Go games and playing with feedback from KataGo. It identifies moves by points lost, gives immediate feedback with an option to retry, offers teaching games that undo sufficiently bad moves, provides weakened AI opponents, and creates focused SGF reviews.

It is distributed with a KataGo binary and model for Windows, Linux and Mac, with settings to download other models and binaries or connect to a remote server. Hardware-specific engine versions need additional setup, and the macOS Homebrew cask can lag behind the releases page.

Key features

  • Review games to find moves most costly in points lost
  • Play against AI with immediate feedback and retry option
  • Play weakened AI versions with various playing styles
  • Generate focused SGF reviews showing biggest mistakes
  • Teaching games automatically undo sufficiently bad moves
  • Dots show points lost, severity, and punishment size
Best for: Go players who want KataGo-based review and practice games with move-level feedback.
Good for
  • Comes with KataGo and model for Windows, Linux and Mac
  • Allows downloading different models and engine binaries in settings
  • Gives move feedback based on full-strength KataGo analysis
Watch out for
  • macOS Homebrew cask can lag several versions behind releases page
  • Hardware-specific KataGo versions are harder to set up than OpenCL
  • ONNX version requires manual onnxProvider setting in config

KaTrain at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Open source
Not stated
Language
English
Last checked
Oct 5, 2026 · Online when checked
Listed
Oct 5, 2026

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KaTrain FAQ

How do I install KaTrain?
Download executables for Windows and macOS from the releases page, use pipx install katrain on any 64-bit OS, or use the brew cask on macOS.
How do I change the KataGo model or binary?
Open 'General & Engine Settings' and use 'Download models' or 'Download KataGo versions', then select from the dropdown menu.
Does KaTrain use KataGo's GTP engine?
No, it uses KataGo's analysis engine, not the GTP engine.
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