Game Analysis
Free, unlimited Stockfish 18 analysis. No signup required.
Free Chess Game Analysis with Stockfish 18
ChessRef offers free, unlimited chess game analysis powered by Stockfish 18 — the strongest open-source chess engine in the world. Import any Chess.com game by username, paste a PGN, or upload a .pgn file to get a full move-by-move breakdown.
What You Get
- Move Grades — every move rated from Brilliant to Blunder based on centipawn loss
- Accuracy Scores — Chess.com-style accuracy percentage for both players
- Eval Graph — interactive evaluation chart showing the flow of the game
- Key Moments — the biggest turning points identified automatically
- Best Moves — see what the engine recommends at every position
How It Works
Analysis runs entirely in your browser using Stockfish 18 compiled to WebAssembly. No server processing, no queues, no daily limits. Enter a Chess.com username to pick a recent game, paste PGN from any chess platform, or upload a .pgn file. Adjust the engine depth from 12 to 22 depending on how thorough you want the analysis to be.
Free Chess Analysis — No Limits
Unlike other tools that restrict free users to a handful of analyses per day, ChessRef game analysis is completely free with no signup required. Analyse as many games as you want at full engine depth. Perfect for reviewing your Chess.com blitz, bullet, and rapid games.