My Blunders

Most chess apps drill you on someone else's puzzles. My Blunders is different: it trains you on the mistakes you actually make. Enter your Lichess or Chess.com username and My Blunders pulls your recent games, runs Stockfish on every move right on your device, and turns each real blunder into a puzzle. You practise the exact positions where you went wrong — the fastest way to stop repeating them. No account to create. No games uploaded to a server. Everything is analysed locally, and you can start instantly with a built-in library of famous blunders from chess history. FOUR WAYS TO TRAIN • Puzzles — Solve the critical positions from your own games. Find the move you missed, then see the engine's full line and exactly where it leads. • Opening — Your games mapped into a living opening tree. See where you drift out of book, spot your weak lines at a glance, and drill the worst offenders. • Coordinates — Learn the board cold. Name squares against the clock, call light or dark instantly, and step through famous games move by move. • Play — Play a full game against an engine tuned to your rating. Every move is judged as you go, the best move is shown and playable on a mini board, and an optional clock opponent paces itself like a human — quick in the opening, longer when the position gets sharp. BUILT TO RESPECT YOU • No accounts, no ads, no tracking. • Only your public games are read; nothing is stored on our servers. • Stockfish analysis runs entirely offline on your device. Whether you're climbing from beginner to club player or sharpening an already-strong game, My Blunders turns your own mistakes into your training plan.