Independent product
Teach Me Chess
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Upload a chess game and find out why you lost. An AI coach called Aurelius explains each mistake in plain words, alongside puzzles, openings and a guided skill path. Over a hundred free lessons, 16 languages, and you can try it without an account.
Most chess engines tell you the move was bad. This one tells you why it was bad, and what habit to fix before your next game.
What it does
Paste a game, or photograph a board, and get a review that reads like a coach rather than an evaluation bar: what went wrong, why, and the one habit to change next. You choose the voice, from gentle and jargon-free to "explain it like I'm 10", and the game replays move by move with arrows on the board. Around the review sit a Skill Path of over a hundred free lessons, a rated puzzle trainer, an opening trainer with a repertoire builder, and drills for the things that actually lose games: board vision, calculation, blunder-checking, knowing when to trade. It works in 16 languages, and you can try a review before making an account.
Why I built it
Engine analysis is everywhere and explanation is scarce. A ?? next to your move tells you that you erred, not what you were thinking when you did it, and the thinking is the only part you can change. I wanted a review that spoke in sentences.
What I learned
A number does not teach. The moment the review started saying why, in plain language, people came back the next day, which no amount of extra engine depth had achieved. I also learned how much of a learning product is patience: the site now has a curriculum, streaks and a calm, warm look, because a tool people return to has to be pleasant to sit in.
