Every move of every Chess.com and Lichess game evaluated by Stockfish 17. Full 40-game Profile Report. No game cap.
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Every move of every Chess.com or Lichess game classified by Stockfish 17 — Brilliant, Best, Excellent, Inaccuracy, Mistake, Blunder. Eval graph, coach commentary, Focus mode. Unlimited.
Open Game ReportA 17-section diagnostic across Opening, Tactics, Endgame, Conversion, Time, Resourcefulness, Mental Game, plus per-piece accuracy, castling analysis, and a personalized improvement plan. Free, unlimited.
Generate Profile ReportConnect your Chess.com or Lichess account, pick any game from your history, and open a full move-by-move review. Engine evaluation on every position. Classification badges on every move. No game cap.
Connect your Chess.com or Lichess account. Lumichess runs Stockfish on every move of your last ~40 rated games and turns the result into a 17-section diagnostic. Then it picks your weakest dimension and gives you 3–5 concrete things to drill.
Yes. Every Game Report and every Profile Report is free. There is no per-game limit, no daily quota, and no paywall on engine analysis. Stockfish 17.1 runs in your browser as a Web Worker, so there's no server-side compute cost to throttle.
Sign in, enter your Chess.com username, and Lumichess pulls your recent games automatically via the Chess.com public API. Click Analyze on any game to open the full Game Report — every move classified, eval graph, coach commentary, and a Try Again puzzle on every mistake.
Yes. Connect your Lichess account by entering your username — Lumichess pulls your recent games via the Lichess public API (with clocks enabled) and analyzes them locally.
Game Report is per-game: every move classified, eval graph, coach commentary, Focus mode. Profile Report is across your last ~40 games: 17 sections of breakdown including a Skill Profile radar, opening repertoire, conversion rate by advantage size, save rate when you fall behind, per-piece accuracy, time-bucket win rates, mental game indicators, and a personalized improvement plan.
Stockfish 17.1 NNUE — currently the world's strongest open-source chess engine — running as a Web Worker in your browser. Default analysis depth is 18 with MultiPV 3.
17 sections: Rating & Momentum, Skill Profile radar (6 dimensions), Opening repertoire, Move-quality vs your opponents, Endgame by position type, Advantage Capitalization (conversion buckets), Time Management (clock-bucket win rates), Resourcefulness (save rate, How Deep Did You Fall), Consistency (per-game accuracy + Accuracy by Result), Personalized Improvement Plan, Performance by Color, Game Phases, How You Win & Lose (resign/mate/timeout split), Mental Game (tilt + resignation profile), Accuracy by Piece, Castling Analysis, and a Game-by-Game list.
Your last ~40 rated games in the chosen time control (Rapid, Blitz, Bullet, or All). Generate separate reports per time control to see how your patterns shift across formats. Refresh any time to pull in newer games.
Yes — Lumichess. Chess.com's free tier caps game review at one per day; Lumichess has no cap, and the analysis depth is configurable per game. You can keep your Chess.com account and use Lumichess in parallel — Lumichess just reads the public games from your profile.
Ten classifications based on win-probability change (not raw eval drop): Brilliant (!!), Smart (!), Best (★), Excellent (✓✓), Good (✓), Book (♔), Inaccuracy (?!), Mistake (?), Missed Win (✕), and Blunder (??). Each badge appears on the destination square in the Game Report.
You can play full-length games against Stockfish-powered bots at varying skill levels with a clock, chat panel, and result overlay. Live play against other humans is on the roadmap but not live yet.
No. Lumichess runs entirely in the browser. Chrome, Safari, Firefox, and Edge on desktop and mobile. Installable as a PWA if you want a standalone app icon.
A 6-axis radar score (0–100 each) across Opening, Tactics, Endgame, Conversion, Time Management, and Resourcefulness. Each axis is tagged Strong, Develop, or Weak Spot. The shape of your polygon is the headline — it shows you exactly where your rating is leaking.