Free chess game review

Every game has a turning point. Find yours.

Bring a game from chess.com, lichess or anywhere else. Hindsight grades every move, explains the moments that decided it, and lets you try the better move yourself.

Have a PGN or a position instead? Open the analysis board. Stockfish 18 runs on your device: no account, no upload, no daily limit.

Works with chess.comlichessPGN from any siteFEN positions

01 · The story

Read the game, not just the numbers.

Each review opens with a short summary of who played well and which move decided the game. Below it, the key moments are listed in order, each with a plain note on what happened and what was better.

Ten move grades, from brilliant to blunder
Accuracy, average centipawn loss and a rating-aware verdict
Separate scores for opening, middlegame and endgame

Paul Morphy played a clean game; the Duke and Count made only 5 small inaccuracies. No single move decided it.

02 · Second chances

Find the move you missed.

Stop at any inaccuracy, mistake or blunder and play your answer on the board. Hindsight checks it with the engine, tells you if it holds up, and only shows the solution when you ask.

Works on every mistake in every game
Near-best answers count, not only the top engine move
Jump between key moments with one click

?Find a better move for Black

In the game, Black played Qe6, which was an inaccuracy. Can you find something stronger?

Show answer

03 · The timeline

See where the game turned, and where the clock went.

The whole game sits on one line you can drag through. Key moments are marked on the curve, and the bars beneath show how long each move took, so time trouble is easy to spot.

Drag to scrub, click to jump
Clock usage for every move of live games
Shareable links to any move

Illustration of a blitz game: the evaluation (top) and seconds spent per move (bottom).

04 · Explore

Test your own ideas against the engine.

Move any piece to start a side line. A live engine follows along with its three best continuations, and the analysis board takes any PGN or FEN you paste in.

Live top-three engine lines
Endgame tablebase for positions with seven pieces or fewer
Annotated PGN download

Stockfish 18depth 22

+0.381. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5

+0.321. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3

+0.321. Nf3 d5 2. d4 e6 3. c4 Nf6 4. g3

05 · Improve

Training built from your own games.

Hindsight finds the patterns behind your mistakes, like missed forks, loose pieces or endgames that slip away, and builds a daily session around them: your own positions coming back on a schedule, plus fresh puzzles of exactly the kinds you get wrong, from the openings you actually play.

Your weak patterns, ranked by what they cost you
Spaced repetition for your own mistakes
An opening leak finder for any chess.com or lichess player
Play the computer from any position

Open training

Opening leaks · example

Caro-Kann Defense (Black)scores 41% over 12 games, against 58% overall

Italian Game (White)scores 44% over 9 games, against 58% overall

Illustration. Your own leaks appear on your stats page.

Yours to control.

Runs on your device

The engine is Stockfish 18, compiled to run inside your browser. Your games are fetched straight from chess.com or lichess and never pass through a server of ours.

No account

There is nothing to sign up for. Analyses are cached in your browser so returning to a game is instant.

No limits

Review as many games as you like, at any depth your device can handle.

Questions

Is it really free?: Yes. The analysis runs on your own device, so it costs us nothing per review and there is no reason to limit you.
Why is my accuracy a little different from chess.com's?: Their formula is private. Ours is calibrated against their published numbers on hundreds of real games and lands within about three points on average, but it will rarely match exactly.
Which games can I review?: Any standard chess game: search a chess.com or lichess username, paste a game link from lichess, or paste a PGN from any other site.
Does it work on a phone?: Yes. Analysis takes longer on slower devices; the Quick depth setting helps.
Do you track me?: Hindsight itself has no analytics and no accounts. Ads are served by Google, which uses cookies for them; where the law requires it, you are asked first. The privacy page lists everything that leaves your device.

Review your last game.

Enter your username

See stats and opening leaks

Evaluation lineTime per move barsKey moments dots

Analysis board

Any position, any game.

Paste a PGN, a FEN or a lichess game link

Engine Depth Lines

Opening explorer

Moves

Practice and set-up

Play as Strength

Stats

Training

Built from your own games.

Hindsight looks at every mistake you have made in games analysed here, finds the patterns behind them, and picks puzzles around exactly those.

Features

Everything Hindsight does today.

Grouped by where you will find it. Items marked New arrived in the latest release; the changelog has the full history.

Bring a game

chess.com gamesSearch any username and pick from their recent games, month by month.
lichess gamesSearch a lichess username, or paste a lichess game link anywhere a username is accepted.
Any PGN or FENPaste a game or a position on the analysis board, or send a PGN straight to a full review.
Shareable linksEvery review link opens the same game at the same move. Pasted games travel inside the link itself.
lichess account NewConnect lichess in Settings to unlock its opening explorer and jump to your own games.

Understand the game

Move gradesBrilliant to blunder, using the classic annotation marks. Hover any mark for its meaning.
AccuracyPer player, calibrated against chess.com’s published accuracies on hundreds of real games; within about three points on average.
Average centipawn lossThe lichess-style measure of how much evaluation each player gave away per move.
Rating-aware verdict and phase scoresBetter or worse than usual for the rating, and accuracy in the opening, middlegame and endgame.
The storyA short summary of the game, its turning point, and key moments with notes.
Time-trouble notes NewThe summary points out when errors came with little time left.
Timeline and move times NewEvaluation curve, key moments and clock usage; seconds spent on each move in the move list.
A guide to the review NewEvery grade and number explained in plain language.

Practice and improve

Personal training NewThe patterns behind your mistakes, ranked by cost, with a daily session of your own positions (spaced repetition) and lichess puzzles matched to your weak spots, openings and rating.
Retry your mistakes NewAfter a review, go through every mistake you made in that game, one after another.
Stats and opening leaks NewResults by colour, time control and opening, a rating chart, and the openings where you score well below your average.
Try againFind a better move at any mistake before the answer is shown.
Play the computer NewFrom any position, at five strengths, with the engine hidden while you play.

Analysis board

Live engine and cloud evaluations NewOne to five lines with the best move drawn on the board; deep lichess cloud evaluations appear instantly when available.
Side lines NewEvery variation you try is kept as a branch; make any of them the main line.
Threat view NewSee what the opponent would play if it were their move.
Opening explorer NewBook moves with opening names, plus lichess’s masters and online databases when connected.
Endgame tablebasePerfect results and best moves for positions with seven pieces or fewer.
Position editor NewSet up any position, choose the side to move and castling rights.
Full-strength engine NewStockfish 19 with its full network, as an option in Settings, with a depth limit up to unlimited.
Player explorer NewAny chess.com or lichess player’s own moves and scores from the current position, from their last 300 games.

Comfort

Board designs and piece sets NewSix boards and three piece sets, with toggles for coordinates, arrows, animation and sound.
Images and GIFs NewCopy or save any position as an image, or the whole game as an animated GIF with each move’s grade.
Open on lichess, annotated PGNSend any game to lichess’s own analysis, or download the review as PGN.
Keyboard shortcutsPress ? on any page to see them.
Private and freeNo account, no uploads, no daily limit. Analyses are cached on your device.

Changelog

What changed, and when.

Privacy

What leaves your device, and why.

Hindsight has no accounts and no server of its own that sees your games. Last updated 18 October 2026.

Games

Fetched straight from the source

When you search a username or open a game, your browser asks chess.com’s or lichess’s public API for it directly. Those sites see the request as they would any visit.
The engine, Stockfish 18, runs inside your browser. Your moves are never uploaded for analysis.
The analysis board can ask lichess for cloud evaluations, endgame tablebase results and opening statistics. Only the position (a FEN) is sent.
Training fetches puzzles from lichess’s public puzzle database. The request names a theme or opening and a difficulty, nothing about you.
“Open on lichess” uploads the game to lichess so it can be shown there. This only happens when you click it.

Storage

Kept in your browser

Finished analyses, training progress, theme and board settings are saved in your browser’s local storage, so returning to a game is instant.
If you connect a lichess account, its access token is stored the same way and only sent to lichess. Disconnect in Settings to delete it.
Clearing this site’s data in your browser removes all of it.

Ads

How Hindsight stays free

Ads are served by Google AdSense. Google uses cookies to serve them, limit how often you see the same ad, and prevent fraud.
In the EEA, the UK and Switzerland, Google asks for your consent before setting those cookies. You can change your choice from the link Google shows at the bottom of the page.
Sponsored text links are plain links. Nothing is loaded from the sponsor until you click.
Google’s own policy is at policies.google.com/technologies/ads, and you can manage ad personalisation at adssettings.google.com.

Not used

What Hindsight does not do

No analytics, no session recording, no account, no email list.
Fonts, piece sets and the engine are served from this site, not from a third-party CDN.
Ko-fi and Buy Me a Coffee are plain links; they only learn of your visit if you follow one.

Every game has a turning point. Find yours.

Read the game, not just the numbers.

Find the move you missed.

See where the game turned, and where the clock went.

Test your own ideas against the engine.

Training built from your own games.

Yours to control.

Runs on your device

No account

No limits

Questions

Review your last game.

Any position, any game.

Stats

Built from your own games.

Everything Hindsight does today.

Bring a game

Understand the game

Practice and improve

Analysis board

Comfort

What changed, and when.

What leaves your device, and why.

Fetched straight from the source

Kept in your browser

How Hindsight stays free

What Hindsight does not do

Keyboard shortcuts

How to read a review

Move grades

The numbers

Getting around

Settings

Board

Pieces

lichess account

Analysis engine

Display