These files contain ECO definitions. They are usually zipped or compressed to make them smaller;
to unpack these files you will need an unzip program such as
WinZIP(windows)
unzip(unix) or
pkunzip(DOS). They all unpack to simple text files.
- ecoindex.zip
- Simple index of ECO Codes showing relationship of variations
- ecolist.zip
- Full list of ECO codes with detailed lines
- ecomast.zip
- Detailed list by Paul Onstad including common lines not described in ECO