Show HN: Mistake Trainer – Spaced repetition from your own Lichess games

Category: other

Tags: chess, spaced-repetition, lichess, learning-tool, client-side

Score: 4.7/10 (Innovation: 5, Technical: 4, Documentation: 3, Utility: 5)

Mistake Trainer is a browser-based tool that pulls computer-analyzed Lichess games and turns repeated blunders into a spaced-repetition deck, reusing the Lichess board UI. It adds card suspension, opening-vs-collapse filtering, and adjustable delays, and keeps all data local. The niche is well-defined and useful for improving Lichess players, though it overlaps with existing similar tools.

Target audience: chess players, especially Lichess users looking to systematically reduce recurring mistakes

Repository: https://mistake-trainer.pages.dev/

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