Show HN: I Used My Medical Note AI to Digitize Handwritten Chess Scoresheets

I built http://chess-notation.com, a free web app that turns handwritten chess scoresheets into PGN files you can instantly import into Lichess or Chess.com.

I'm a professor at UTSW Medical Center working on AI agents for digitizing handwritten medical records using Vision Transformers. I realized the same tech could solve another problem: messy, error-prone chess notation sheets from my son’s tournaments.

So I adapted the same model architecture — with custom tuning and an auto-fix layer powered by the PyChess PGN library — to build a tool that is more accurate and robust than any existing OCR solution for chess.

Key features:

Upload a photo of a handwritten chess scoresheet.

The AI extracts moves, validates legality, and corrects errors.

Play back the game on an interactive board.

Export PGN and import with one click to Lichess or Chess.com.

This came from a real need — we had a pile of paper notations, some half-legible from my son, and manual entry was painful. Now it’s seconds.

Would love feedback on the UX, accuracy, and how to improve it further. Open to collaborations, too!