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The Encyclopaedia of Chess Openings (ECO) is a reference work describing the state of opening theory in chess, originally published in five volumes from 1974 to 1979 by the Yugoslavian company Šahovski Informator (Chess Informant). It is currently undergoing its fifth edition.
This is a list of chess openings, organised by the Encyclopaedia of Chess Openings (ECO) code classification system. The chess openings are categorised into five broad areas ("A" through "E"), with each of those broken up into one hundred subcategories ("00" through "99"). The openings were published in five volumes of ECO, with volumes labeled ...
A chess opening theory table or ECO table (Encyclopaedia of Chess Openings) presents lines of moves, typically (but not always) from the starting position. Notated chess moves are presented in the table from left to right. Variations on a given line are given horizontally below the parent line.
Since then, better defences for Black have been developed, and this line is considered to slightly favour Black. Jon Jacobs wrote in the July 2005 Chess Life (p. 21): "A database search (limited to games longer than 20 moves, both players FIDE 2300+) reveals the position after 7.Nxd4 was reached 20 times from 1985–2002. White's results were ...
This is a list of chess openings that are gambits. The gambits are organized into sections by the parent chess opening, giving the gambit name, ECO code, and defining moves in algebraic chess notation .
The Encyclopaedia of Chess Openings includes an alphanumeric classification system for openings that is widely used in chess literature. Codes C00 to C19 are the French Defence, broken up in the following way (all apart from C00 start with the moves 1.e4 e6 2.d4 d5):
The European Chess Union (ECU) is the continental association for chess in Europe. ECO The Encyclopaedia of Chess Openings (ECO), a standard and comprehensive chess opening reference. Also a classification system (ECO code) for openings that assigns an alphanumeric code from A00 to E99 to each opening. edge
The Berlin Defence is a chess opening that begins with the moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6. The opening is a variation of the Ruy Lopez and is assigned codes C65–C67 in the Encyclopaedia of Chess Openings. [1] The code C65 covers White moves other than 4.0-0, such as 4.d3 (4.Nc3 is considered a variation of the Four Knights Game). The ...