How to access Chesscom programmatically to retrieve JSON and PGN content.
Download Chess.com games as a PGN with filters & live progress.
Generate JSONL from pasted Chessmetrics data.
A collection of various PGN databases.
The system of patterns that define the Encyclopaedia of Chess Openings.
Historical ratings for players, ranging up near 1950.
Browse official FIDE monthly chess ratings (filtered, >2300 peak).
Sort & unwrap PGN blocks by tag.
Generate an animated GIF from a single-game PGN client-side.
Interactive PGN replayer powered by Chess Tempo.
Regional / national chess databases and resources.