ECO Codes
ReadySearch Encyclopedia of Chess Openings codes and named lines, with a board diagram for every opening.
Reference Tools
Chess opening, engine, software, and development references.
Engine Releases
ReadyA daily feed of the latest releases from open-source chess engines on GitHub, newest first.
Software Catalog
ReadyMy PGN tools, plus the essential chess databases, analysis suites, and engine tools players rely on.
Stockfish Commits
ReadyBrowse Stockfish commits, source snapshots, authors, dates, and messages.