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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").
g. h. The starting position of chess. 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".
Chess rating system. A chess rating system is a system used in chess to estimate the strength of a player, based on their performance versus other players. They are used by organizations such as FIDE, the US Chess Federation (USCF or US Chess), International Correspondence Chess Federation, and the English Chess Federation.
Fischer random chess, also known as Chess960 ('chess nine-sixty'), is a variation of the game of chess invented by the former world chess champion Bobby Fischer. [1] Fischer announced this variation on June 19, 1996, in Buenos Aires, Argentina. [2][3][4] Fischer random chess employs the same board and pieces as classical chess, but the starting ...
In the center are the two openings included in the volume: 1.d4 Nf6 2.c4 e6; and 1.d4 Nf6 2.c4 g6 without (symbol ┘) an early ...d7–d5. 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 ...
Open Game. An Open Game (or Double King's Pawn Opening) is a generic term for a family of chess openings beginning with the moves: White has moved the king's pawn two squares and Black has replied in kind. The result is an Open Game. Other responses to 1.e4 are termed Semi-Open Games or Single King's Pawn Games.
Modern Chess Openings (usually called MCO) is a reference book on chess openings, first published in 1911 by the British players Richard Clewin Griffith (1872–1955) and John Herbert White (1880–1920). The fifteenth edition was published in 2008. Harry Golombek called it "the first scientific study of the openings in the twentieth century".
The Sokolsky Opening, also known as the Orangutan and the Polish Opening, is an uncommon chess opening that begins with the move: 1. b4. According to various databases, out of the twenty possible first moves from White, the move 1.b4 ranks ninth in popularity. [1] It is considered an irregular opening, so it is classified under the A00 code in ...