ECO stands for the “Encyclopaedia of Chess Openings” and is used by almost all chess players and publications all over the world.

 

Individual openings variations have a code consisting of a letter (A – E) and a two-digit number. There are also names for most of them.

 

Examples:

 

A51      Budapest Gambit, Fajarowicz Variation

B72      Sicilian Dragon: 6 Be3, lines with h3+Bc4 and sidelines

 

The ECO classification used by this program was improved by leading openings expert GM Dr. John Nunn.

 

The program can create an openings key based on the ECO code.

 

 

When you save a game, the correct ECO code is automatically inserted.