Chess Game Analyzer

One-click, fully local Stockfish game review for finished chess games, styled with your own chess theme.

Chess Game Analyzer provides full game analysis for any completed game of chess. It reviews every move using Stockfish 18, calculates player accuracy scores, classifies each move (Brilliant, Great, Best, Excellent, Good, Book, Inaccuracy, Mistake, Miss, Blunder), and displays an evaluation bar with an interactive evaluation graph. Key Features: - Fully local analysis powered by Stockfish 18 running right inside your browser (WebAssembly). - No external server dependencies or tracking. Your games are analyzed locally on your own machine. - Interactive side panel that adapts to your chess board colors, piece set, and theme. - Evaluation graph and move-by-move accuracy breakdown. - Turn on best-move visual arrows and customize engine analysis depth. - Instant re-analysis caching for previously reviewed games. How to Use: 1. Play or open any completed game of chess. 2. The extension badge turns green when the game concludes. 3. Click the extension icon to open the analysis side panel. 4. Click "Analyze game" and navigate through moves with your arrow keys.