Encyclopedia of Chess Openings – Volume C

The Encyclopedia of Chess Openings is the globally recognized standard reference system for classifying chess openings. Structured into five volumes labeled A–E, it organizes opening theory into a consistent alphanumeric coding system (ECO codes) used by players, databases, and tournament preparation tools worldwide.

Volume C focuses on Open Games (1.e4 e5) and the French Defense (1.e4 e6), covering the ECO range C00–C99. It provides a systematic breakdown of both classical and modern opening theory, from early deviations to deeply analyzed mainline systems.

ECO Classification Code Range (Volume C)

• C00–C19: French Defense (1.e4 e6 2.d4 d5)
• C20–C59: Open Games, including
  • Vienna Game
  • King’s Gambit
  • Bishop’s Opening
  • Italian Game
  • Evans Gambit
• C60–C99: Ruy Lopez (Spanish Opening), including
  • Early sidelines and minor variations
  • Exchange Variation
  • Main theoretical lines
  • Marshall Attack
  • Chigorin Variation

Key Features

• Global standard for chess opening classification (ECO system)
• Structured alphabetical and numerical coding system (A00–E99 overall set)
• Volume C focuses on 1.e4 e5 and French Defense systems
• Covers both classical openings and deep theoretical main lines
• Widely used in databases, engines, and tournament preparation
• Essential reference for systematic opening study and research

Recommended For

Ideal for tournament players, coaches, and serious students of chess theory who need a structured reference system for studying, organizing, and analyzing chess openings at a professional level.