# List of ECO codes

> List of the codes used to classify chess openings in the Encyclopaedia of Chess Openings

**Wikidata**: [Q374709](https://www.wikidata.org/wiki/Q374709)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/List_of_ECO_codes)  
**Source**: https://4ort.xyz/entity/list-of-eco-codes