ECO opening data
================

`eco_openings.json` is derived from the Lichess chess-openings dataset:

https://github.com/lichess-org/chess-openings

The dataset provides ECO codes, English opening names, and representative
move sequences. The project documents the opening-name collection as released
under the CC0 Public Domain Dedication:

https://creativecommons.org/publicdomain/zero/1.0/

The source TSV volumes A through E were retrieved on 2026-09-10 and converted
to UCI move-prefix records for offline lookup in Chessmaster Professional.