PicChess

Scan image

Pick a screenshot or photo of a board. Stays on this device unless you tick 'Help improve PicChess' (then only the cropped board is shared).

Upload image Take picture

or paste an image (Ctrl/Cmd+V) or drop it here

Which colour is at the bottom of the picture? (guessed from the pieces) White Black

Whose move is it? White Black

The model runs in this page: nothing is uploaded unless you tick the box above. Next you get the board to check and correct.

Pick a piece below, then tap a square to put it there. Tap the same piece again to remove it. Choose Drag to move pieces.

Side to move White Black

I play White Black

Castling White O-O White O-O-O Black O-O Black O-O-O

En passant square FEN

About PicChess

Recognition runs entirely in your browser: your picture stays on your device. If you tick "Help improve PicChess" on the Scan panel, only the cropped, straightened board is shared (see Privacy below). There is no account.

Piece model: PicChess squares-screen (our own, trained on rendered boards in 30 piece sets and many themes).
Runtime: onnxruntime-web (MIT, Microsoft).
Board: cm-chessboard (MIT). Pieces: Chessnut (Apache-2.0). Rules: chess.js (BSD-2). Engine: Stockfish (GPL-3, licence).
Full list with licence files: Licences.

Privacy: if you tick the box, only the cropped, straightened board (no other part of your picture) is sent once, with the position you confirmed and your corrections, as public domain (CC0) training data. We also count visits per day and source, nothing else. No cookies, no tracking.

Accuracy counter: this device keeps a count of how many squares you corrected after each scan. It is stored only in this browser and never sent anywhere.