Last updated: 2026. By creating an account or using Chess Mistake Trainer you agree to these terms.
Chess Mistake Trainer analyses your recent online chess games and generates training puzzles from your biggest mistakes. It is provided as a free hobby project, "as is", with no guarantee of availability, accuracy, or fitness for any particular purpose.
You are responsible for keeping your password safe and for activity under your account. Provide a real email so password resets reach you. Only link chess usernames you own or are entitled to analyse.
Don't abuse the service: no attempts to overload it, break its security, access other users' data, or use it to violate Chess.com's or Lichess's terms. We may rate-limit, suspend, or remove accounts that do.
How we handle your data is described in our Privacy Policy. You can delete your account and all associated data at any time from your Profile page.
To the maximum extent permitted by law, we are not liable for any damages arising from your use of the service. The service may change or shut down at any time.
Questions? Email your-contact@example.com.