ECO at a Glance

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ECO at a Glance
Chess Informant's Encyclopedia of Chess Openings (ECO) is a universal classification for chess openings
The acronym ECO (Encyclopedia of Chess Openings) refers to two different but related concepts:-

A five volume reference (A-E) published by Chess Informant; and
A system of chess opening classification using codes A00-E99.

Each volume of the Encyclopedia covers 100 codes, e.g. Volume A covers A00-A99. This image gallery shows the ten single digit codes, e.g. A0-A9, covered by each volume.

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ECO Vol.E Encyclopedia Volume EChess Informant's ECO Volume E (E00-E99) was first published in 1978. ECO Vol.E	ECO E0-E9 E00-E99; Encyclopedia of Chess Openings (ECO) Volume E: E00-E99 Contents: 1.d4 Nf6 2.c4 e6 1.d4 Nf6 2.c4 g6 without 3...d5 ECO E0-E9	E00-09 E0 : 1.d4 Nf6 2.c4 e6 without 3.Nf3, 3.Nc3 E00-09	E10-19 E1 : 1.d4 Nf6 2.c4 e6 3.Nf3 E10-19
E20-29 E2 : 1.d4 Nf6 2.c4 e6 3.Nc3 without 3...d5, 3...Bb4 3...Bb4 without 4.Bg5, 4.Qc2, 4.e3 E20-29	E30-39 E3 : 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 4.Qc2 E30-39	E40-49 E4 : 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 without 4...0-0 4...0-0 without 5.Nf3 E40-49	E50-59 E5 : 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 E50-59
E60-69 E6 : 1.d4 Nf6 2.c4 g6 (without 3...d5) without 3.Nc3 3.Nc3 without 3...d5, 3...Bg7 3...Bg7 without 4.e4 E60-69	E70-79 E7 : 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 without 4...d6 4...d6 without 5.f3, 5.Nf3 E70-79	E80-89 E8 : 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 E80-89	E90-99 E9 : 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 E90-99

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