100% Client-Side

The board under this note is our analyzer, loaded in a frame. It is not a copy of a Chess.com or Lichess page. Ads are not loaded on this screen. The writing below the board is how to read an evaluation and what a pasted game link does and does not do.

Live Chess Game Analysis with Free Eval Bar Online

Analyze any chess game online with a live evaluation bar powered by Stockfish — the world's strongest open-source chess engine. Paste a live game link from chess.com or Lichess and watch the eval bar update in real time, or upload a board screenshot to get instant position analysis. 100% free, no signup, runs entirely in your browser.

Key Features

  • Live Eval Bar — Real-time Stockfish evaluation bar shows who's winning during any live chess game
  • Live Game Tracking — Paste a Lichess or chess.com game URL and follow along with engine analysis move-by-move
  • Screenshot to FEN — Upload or paste (Ctrl+V) any chess screenshot; get the exact FEN position in under 500ms using pure computer vision
  • Stockfish Engine — Full-strength Stockfish running in-browser via WebAssembly. See top 3 engine lines, depth, and centipawn evaluation
  • Interactive Board Editor — Drag pieces to correct any position, flip the board, set castling rights
  • Open in Lichess — One click to continue deeper analysis on Lichess with the current position
  • Zero Lag Tracking — With a free Lichess Board API token, get instant move updates with zero polling delay

How to Use the Live Chess Eval Bar

  1. Paste your live game URL in the "Live Game Tracking" box (supports Lichess and chess.com links)
  2. Click "Track" — the eval bar appears instantly showing Stockfish's evaluation
  3. Watch the evaluation update after each move in real time
  4. Click "Analyze" at any point to see the best move, top engine lines, and alternative variations

How to Analyze a Chess Screenshot

  1. Take a screenshot of any chess position (chess.com, Lichess, a book, a stream, any 2D board)
  2. Upload or paste (Ctrl+V) the image into the analyzer
  3. The tool detects the board, identifies all pieces, and outputs the FEN in under 1 second
  4. Use the eval bar and Stockfish to find the best move, or click "Open in Lichess" for deeper analysis

Supported Platforms

Works with screenshots and live game links from: chess.com (all piece themes and board colors), Lichess (all themes), Chessify, Chess24, ChessKid, 365chess, Chess Tempo, and virtually any 2D digital chess board. Also works with photos of printed chess diagrams and book positions.

Why Choose This Over Other Chess Analysis Tools?

  • Completely free — No premium tiers, no credit card, no "5 analyses per day" limit
  • No download required — Runs in your browser. No app install, no Java, no extensions
  • Not an ad screen — This page does not load AdSense. A game URL you paste is fetched so you can step through it. This site does not keep a copy of that game
  • Screenshot support — Unlike Lichess analysis or 365chess, you can paste any board screenshot directly
  • Live tracking — Unlike ChessCompass or DecodeChess, track live games with a real-time eval bar
  • All-in-one — Combines screenshot OCR + live game tracking + Stockfish eval + board editor in one tool
Frequently Asked Questions about Live Chess Analysis
How do I get a live eval bar for my chess game online?
Paste your live game link (Lichess or chess.com) into Aya Corporation's Chess Analyzer. The built-in Stockfish engine instantly shows a live evaluation bar with best-move arrows — no download, no signup, completely free.
Can I analyze a chess.com or Lichess game in real time?
Yes. Enter your game URL in the Live Game Tracking section. The tool follows the game move-by-move, showing the eval bar and Stockfish's top 3 engine lines with zero lag if you provide a Lichess Board API token, or ~2 second polling without one.
How does the chess screenshot to FEN feature work?
Upload or paste (Ctrl+V) any chess screenshot. The tool uses pure computer vision (no AI cloud calls) to detect the board grid, identify all 64 squares and piece types, then outputs the exact FEN string in under 500 ms. Works with chess.com, Lichess, Chessify, ChessKid, and any 2D board theme.
Is this chess analysis tool really free?
Yes. There is no account. This screen does not load Google ads, because the board is an embedded application. The notes under the board explain how to read the evaluation.
Does this page copy Chess.com or Lichess?
No. The board is our analyzer in a frame. A game URL is read so you can step through a game you already have a link to. The site does not republish those games or their commentary.
Does it work on mobile?
Yes. The tool is fully responsive and works on iOS and Android browsers. Upload screenshots from your camera roll or paste from clipboard.

Notes from this implementation

The board is an embedded app, so this screen does not carry ads

The diagram above is our analyzer, loaded in a frame from the app we host for it. It is not a Chess.com or Lichess page, and it is not their analysis reprinted underneath an ad. Google’s program policies do not allow ads on a screen whose main content is an embedded application of that kind. This page does not load the AdSense script. The writing under the board is the original part: how to read the result, and what the frame does not do.

How to read the evaluation

The bar is the engine’s numeric evaluation of the position on the board, in pawns, from the side to move or from White, depending on the label in the app. +1.5 means the engine thinks White is ahead by about a pawn and a half if both sides play the moves it considers best. It is not a prediction of who will win a blitz game, and it is not a verdict on the last move until you compare it with the evaluation before that move. A move that keeps the number steady is not always a good move in a lost position. A move that drops the number by two pawns gave something away, or the engine changed its mind because it searched deeper.

Stockfish, or whichever build the frame runs, looks at a finite depth. A sacrifice that pays off ten moves later can look like a blunder at low depth. If the number is still jumping, wait for the depth to settle before you treat it as a fact. The best-move arrow is the engine’s choice, not a rule of chess.

Game links and screenshots

If you paste a live game URL, the app reads the move list so you can step through a game you already have a link to. It does not publish that game, and this site does not keep a copy of it. A screenshot import is a guess at the piece placement. Check the position before you trust the bar. A bishop on the wrong color square means the recognition missed a piece, and the evaluation of that wrong position is internally consistent and still useless.

Use the frame to study a position you own or a game you are allowed to view. The notes here are not a substitute for a coach, and they are not a copy of someone else’s lesson.