Review any chess game. Free & unlimited.
100% in your browser · Stockfish 18 · no accountAnalysis board →
How it works
From PGN to full review in seconds
- 1
Add your game
Import from your Chess.com or Lichess username, or paste any PGN.
- 2
Stockfish analyzes
Every position is evaluated in parallel across your CPU cores, right in your browser.
- 3
Get your review
Classifications, accuracy, key moments, and a guided walkthrough — instantly.
Inside the review
Everything a game review should be
Every move graded, every swing charted, every turning point explained — the depth Chess.com charges for, free.
The swing of the game
White win % · by move
Every move, graded
Move classifications
Every move graded Brilliant → Blunder on a win-probability model — with sacrifice, only-move, and missed-win detection.
Accuracy & estimated rating
Per-player accuracy, an estimated rating, and average centipawn loss, using lichess's open formulas.
Interactive eval graph
Watch the game swing move by move. Click anywhere on the curve to jump there; key moments are marked.
Guided key moments
Step through the turning points. On a mistake, preview the engine’s best move and walk the punishment line.
Coach commentary
A plain-English note on every notable move — what changed and why, no chatbot required.
Opening detection
Your opening is named from a lichess-derived book, and the moves still in book are marked.
Variation explorer
Branch off any position and play your own moves — Stockfish evaluates your line live.
Your games stay private
Your games are analyzed in your browser and never uploaded — no PGNs or moves leave your device.
FAQ
Frequently asked questions
Is it really free?
Yes — completely free and unlimited. No account, no ads, no daily limit. Stockfish runs in your browser, so there is nothing to meter.
How is this different from Chess.com's Game Review?
Same idea — move classifications, accuracy, estimated rating, an eval graph, and a guided walkthrough — but free and unlimited with no account. Chess.com limits free reviews to one per day.
What does the review show?
Every move classified (Brilliant → Blunder), per-player accuracy and estimated rating, average centipawn loss, an interactive eval graph with key moments, push-style coach commentary, and opening detection.
Do I need an account?
No. There is nothing to sign up for. Your games are analyzed locally and never leave your device.
Which games can I analyze?
Import your recent games straight from your Chess.com or Lichess username, or paste any PGN. Games are fetched right in your browser from the sites’ public APIs — no account or upload needed.
How accurate is the analysis?
It uses real Stockfish 18 (WebAssembly) at a depth you choose, with lichess win%/accuracy formulas and chess.com-style classification thresholds. Deeper search means more accuracy; the default balances speed and quality.