Frag Rattmann, Rattmann hat ...

The five volume Encyclopaedia of Chess Openings - A, B, C, D, E - consists of 500 sections based on opening codes. Its key quality, unique among openings books, is a system of elimination which helps the reader to find the critical lines in the midst of the abundance of information. 

 

The same contents as printed books of ECO A - 4th edition, ECO B - 4th edition, ECO C - 5th edition, ECO D - 4th edition, ECO E - 3rd edition

 

A
English Opening, Reti, Benoni, Volga Gambit, Dutch Defence, ...
B
Sicilian Defence, Caro-Kann, Pirc, Modern, Alekhine, Scandinavian, ...
C
Ruy Lopez, French, Scotisch, Russian, King’s Gambit, ...
D
Queen’s Gambit, Slav, Gruenfeld, Queen's Pawn Game, ...
E
King’s Indian, Nimzo-Indian, Queen’s Indian, Bogoliubov, Catalan, ...

In 4 different formats (Chess Informant Expert, PGN, ChessBase and Chess Assistant)