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Free Chess Game Review & Stockfish Analysis

Import games from Chess.com, Lichess, or raw PGN. Enjoy 100% free, unlimited game reviews with zero ads, master-depth Stockfish 18 evaluations, move accuracy, and opening statistics — running privately in your browser.

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Stockfish 18 In-Browser

Grandmaster-depth evaluation runs locally in your browser using multi-threaded WebAssembly. No server queues, no rate limits.

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100% Free • Zero Ads

Unlike commercial platforms that cap free reviews or clutter the board with ads, PwnHero Chess Review is 100% free with zero ads and no subscriptions.

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Accuracy & Classification

Calculates overall game accuracy and flags Brilliant, Great, Best, Excellent, Inaccuracies, Mistakes, and Blunders on every move.

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Opening Explorer & ECO

Automatic ECO code identification with real-time win rate statistics from master and online game databases.

How to Review Your Chess Game

  1. Enter your Chess.com or Lichess username to fetch recent games, or paste any standard PGN.
  2. Select your evaluation depth and analysis engine settings.
  3. Step through moves with the interactive evaluation bar, engine recommendations, and alternative lines.
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