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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 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.
The gambits are organized into sections by the parent chess opening, giving the gambit name, ECO code, and defining moves in algebraic chess notation. Alekhine's Defense
The Franco-Indian Defence is a chess opening characterized by the moves: 1.d4 e6. This play allows White to play 2.e4, entering the French Defence . If White wants to continue with a Queen's Pawn Game however, 2.c4 and 2.Nf3 usually transpose to a familiar opening such as the Queen's Gambit Declined , Nimzo-Indian or Queen's Indian .
The Four Knights Game is a chess opening that begins with the moves: . 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6. This is the most common sequence, but the knights may develop in any order to reach the same position.
A common opening sequence is 1.d4 Nf6 2.c4 e6 3.g3, although various other openings can transpose into the Catalan. The Encyclopaedia of Chess Openings (ECO) lists codes E01–E09 for lines with 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2; other lines are part of E00. In the Catalan, White adopts a combination of the Queen's Gambit and Réti Opening. White ...
The Encyclopaedia of Chess Openings (ECO) identifies the Colle System as an uncommon continuation of the Queen's Pawn Game, assigning it the code D05. [a] In the ECO, the Colle System is defined by the line 1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3 c5 5.c3. [1] Paul van der Sterren gives an identical definition, with the same moves played in the same ...
The Modern Defense (also known as the Robatsch Defence after Karl Robatsch) is a hypermodern chess opening in which Black allows White to occupy the center with pawns on d4 and e4, then proceeds to attack and undermine this "ideal" center without attempting to occupy it. The Modern Defense usually starts with the opening moves: 1. e4 g6