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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 opening is the initial stage of a chess game. It usually consists of established theory.The other phases are the middlegame and the endgame. [1] Many opening sequences, known as openings, have standard names such as "Sicilian Defense".
In chess, a tactic is a sequence of moves that each makes one or more immediate threats – a check, a material threat, a checkmating sequence threat, or the threat of another tactic – that culminates in the opponent's being unable to respond to all of the threats without making some kind of concession.
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 English Opening is a chess opening that begins with the move: 1. c4. A flank opening, it is the fourth most popular [1] [2] and, according to various databases, one of the four most successful of White's twenty possible first moves. [1] [3] White begins the fight for the centre by staking a claim to the d5-square from the wing, in ...
The Hippopotamus Defence is a chess opening system employed by Black, consisting of a double fianchetto structure (bishops on b7 and g7) and a small pawn centre (pawns on d6 and e6). The knights are typically developed to e7 and d7 and the rook's pawns to a6 and h6. [ 1 ]