Encyclopaedia of Chess Opening B1” (5th edition)Half a century ago the first edition of the Encyclopaedia of Chess Openings was released, as a truly unique, ground breaking tome. Such monumental work was a logical continuation to the Informant series which came to life a few years earlier. Chess Informant introduced a completely revolutionary system of chess signs, and also created the classification of chess openings, according to codes (ECO codes). Today Chess Informants ECO Codes and System of
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