Building a Self-Hosted Chess Blunder Trainer

TL;DR I’ve built a blunder tutor, a project to train upon your historic blunders, that’s open-source, self-hosted and free to use: github, promo. Star, like, subscribe, give it a try! docker run \ -p 8000:8000 \ -v $(pwd)/data:/app/data \ ghcr.io/mrlokans/blunder-tutor:latest Open http://localhost:8000, enter your Lichess or Chess.com username, and start training on your own blunders. Intro I suck at chess. Like, it seems that when your body turns 30, suddenly your neural network stops learning new patterns the way it used to when you were 20. It’s predictable but still annoying and frustrating. ...

March 8, 2026 · 21 min · 4472 words · Andrei Sviridov