
ScanChess
Photograph a handwritten scoresheet and get a rule-checked PGN; photograph a board and get a FEN.
ScanChess at a glance
| Price | Free · from $4.99/mo |
|---|---|
| Free tier | Yes |
| Platforms | Web |
| Best for | Beginner (0 – 1200), Intermediate (1200 – 1800), Advanced (1800 – 2200), Expert (2200+) |
| Publisher | SudoAI |
| Website | scanchess.com |
| Launched | 2026 |
| Last reviewed |
About ScanChess
ScanChess is a browser-based chess OCR tool. Upload the pages of a handwritten scoresheet and a vision model proposes a move for every cell, replays the game with chess.js, and flags anything illegal or uncertain for you to correct before exporting the PGN. Upload a screenshot, a book diagram or a top-down photo of a real board and you get an editable FEN with the side to move to confirm. Scanning uses credits and needs an account; the surrounding toolkit - a PGN viewer, a board editor, a PGN validator, printable scoresheets and Stockfish 18 game analysis running in the browser - is free with no sign-in. A batch mode groups a whole tournament round by board and pairing list. Built by SudoAI, a small studio, for over-the-board players, coaches and arbiters.
The verdict
ScanChess goes after a chore every over-the-board player knows: the scoresheet goes in a folder after the round and the game is never looked at again, because typing it in takes longer than the game deserves. Photograph the pages, and the moves come back on a board beside the original, with any move that is illegal or that the model wasn't sure of flagged for checking. Fix those, export the PGN, and the game is ready for Lichess, Chess.com or ChessBase.
What separates it from the board scanners is the handwriting. Chessvision.ai, the established tool in this category, reads boards and diagrams; it does not read a scoresheet. ScanChess does both, and its board-to-FEN side is the familiar one: a screenshot or a book diagram comes out clean, a top-down photo of a real board usually does, and an angled shot of carved pieces will need a square or two moved. The site says so itself, which is the right tone for OCR.
The design choices are sensible. A doubtful move is never rewritten; it is marked, and the editor proposes the legal moves nearest to what was written. A second check looks for material that behaves the way no real game does - a piece left hanging that nobody takes - and flags those plies too, since a misread move is usually still a legal one. No accuracy figure is quoted anywhere. Expect to check a few moves in a typical game, and treat an unflagged move as probably right rather than certainly right.
Pricing is credits only. Ten come free with sign-up and no card, a scoresheet costs two whatever its page count, a board costs one, and editing, replay, export and history are free on every account. Pro at $4.99 a month or $29.99 a year adds 100 credits every 30 days; Pro+ five times that. For a club player with a handful of tournaments a year the free credits and an occasional Pro month will do; the annual plans are for coaches and arbiters, and the batch mode - a whole round grouped by board number with a pairing list, exported as one PGN plus a list of what still needs a human eye - is clearly built for them. Read the refund policy first: there are no refunds, including for unspent credits.
The company behind it is the weak point. The site names SudoAI as the operator but gives no legal entity, address or country, the domain dates from January 2026 and the terms from August. An iOS app and a Chrome extension are mentioned throughout, yet neither has a store link on the site and no App Store listing could be found. None of that touches the web product, which is documented with unusual care, but it is worth knowing before buying a year up front. This review is based on the site, the free examples and the documentation; we did not create an account or scan our own scoresheets.
For anyone with a pile of handwritten games, the ten free credits are worth spending. Pay only once the recognition has proven itself on your handwriting.
Pros
- Reads handwriting, not just boards: the one step between a stack of tournament scoresheets and a game you can replay, which Chessvision.ai and the Lichess/Chess.com importers don't do
- Nothing is corrected silently - illegal and low-confidence moves are flagged next to the original photo, and the editor offers the legal moves closest to the ink
- Honest about accuracy: no percentage is quoted anywhere, and the review step is presented as part of the job rather than hidden
- The free tools are genuinely free and need no account: Stockfish 18 game analysis in the browser, a PGN viewer, a board editor, a validator and printable FIDE-style scoresheets
- Batch scanning files a whole round by board number and pairing list, which is an arbiter's workflow nobody else offers at this price
Cons
- No refunds under any circumstances, unspent credits included - the 10 free credits are the trial, so use them before paying
- A scoresheet costs 2 credits, so the free allowance is five games: enough to test, not enough to archive a weekend tournament
- The site says "web and iOS app" and has a "View in Chrome Web Store" button, but links to neither, and no App Store listing turned up under ScanChess or SudoAI as of 11 October 2026
- Young and thin behind the scenes: domain registered in January 2026, terms dated August 2026, and "SudoAI" is a name with no company, address or country given - Waffo is the only identifiable party to a payment
- Algebraic notation only; descriptive scoresheets (P-K4) are not converted, and angled photos of real boards with 3D pieces need squares corrected by hand
Features
Pricing
- Pro$4.99 /month
- Pro (annual)$29.99 /year
- Pro+$19.99 /month
- Pro+ (annual)$119.99 /year
Credits are the only thing you pay for: a scoresheet scan costs 2 credits whatever the page count, a board image 1. New accounts get 10 credits with no card, credits never expire, and editing, replay, PGN export and game history are free on every account. All payments are final: no refunds, including unspent credits. Web checkout goes through Waffo as merchant of record. Prices as of 11 October 2026.