ECO - Encyclopaedia of Chess Openings
This CLI tool lets you practice chess openings by prompting you to enter corresponding moves. The openings are organised based on ECO classification which organises openings in 5 volumes and 100 subdivisions in each volume
You must have nodejs and npm or yarn installed on your system to proceed.
npm i -g eco-chess
yarn global add eco-chess
Run eco command in your terminal window. It will launch the app and will prompt you to go through setup options to start your practice session.
By default all groups are selected. Groups are ranges of ECO opening codes that have common starting moves. For example, all openings in B20-B99 group (Sicilian defence) have starting moves 1. e4 c5; A80-A99 (Dutch defence) have starting moves 1. d4 f5, etc.
2nd setup step lets you select how deep of the tree you want to practice.
For example, for B20-B99 (Sicilian defence) group 1st level is the root - 1. e4 c5. 2nd level are all child nodes to it:
- B21 -
1. e4 c5 2. f4 - B22 -
1. e4 c5 2. c3 - B23-B26 -
1. e4 c5 2. Nc3 - B27-B99 -
1. e4 c5 2. Nf3
3rd level, 4th... etc are further expansion on the moves and more specific openings.
3rd setup step lets you filter (select/unselect) individual test items (openings) to be added to the practice test set
After completing setup the program will output a table of all selected levels and items in the test set.
The program will prompt you with opening ECO code and its' name. If you enter the corresponding moves correctly, it will move on and promt you on the next opening name. If you enter wrong moves, it will output the right moves:
The number in the parenthesis is the level (depth) of the opening in the tree.