Each code (e.g., – Sicilian, 2.c3) includes:
The Encyclopedia of Chess Openings is a massive, five-volume system developed by Chess Informant [1]. It classifies all possible chess openings into five volumes, labeled A through E [1]. Flank openings, English, Benoni, Dutch [1]. Volume B: Semi-Open games (excluding French Defense) [1]. Volume C: Open Games (1.e4 e5) and the French Defense [1]. Volume D: Closed Games (1.d4 d5) and Grunfeld [1]. Volume E: Indian Defenses (1.d4 Nf6 without 2...d5) [1].
