Eco PGN
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Download a huge free pgn library of chess openings classified by their ECO code
The Encyclop(a)edia of Chess Openings (ECO) is a book collection (now also a computer database) describing chess openings. The moves were taken from hundreds of thousands of games between masters, from published analysis in the Chess Informant since 1966, and then compiled by notable chess players. ECO is published by the Serbian company Sahovski informator. These openings are typically provided in an ECO table that concisely presents the best opening lines. Instead of the traditional names for the openings, ECO has developed a unique coding system that has also been used by other chess publications. There are five main categories, A-E, each of which is divided into a hundred sub-categories:
