The fourth thoroughly revised and updated edition of the Encyclopaedia of Chess Openings, Volume D, brings additional 56 pages of the brand new material:

• 1. d4 d5 & 1. d4 Nf6 2. c4 g6 followed by 3... d5:
  Queen's Gambit (Slav, QG Accepted, Orthodox, Tarrasch, Tartakower, etc.), Gruenfeld, Queen's Pawn, etc.
• games and analyses from Chess Informants 1-88
• important game entries from recent tournament practice
• revised ECO codes

Chess Informant's trademark system of elimination remains one of the key qualities that contributes to the fundamental value of the Encyclopaedias. Previously filtered into Chess Informants 1-88, all the lines had to additionally pass through multiple sieves of the Chess Informant Editorial Board to deserve their place in the fourth edition: only the most extraordinary examples that failed to find their way to the Informants managed to sneak into the new Encyclopaedia.