This is a list of chess openings, organized by the ''

Encyclopaedia of Chess Openings The ''Encyclopaedia of Chess Openings'' () is a reference work describing the state of opening theory in chess, originally published in five volumes from 1974 to 1979 by the Serbian company Šahovski Informator (Chess Informant). It is curre ...

'' () code. In 1966,

Chess Informant Chess Informant (Šahovski Informator) is a publishing company from Belgrade (Serbia, former Yugoslavia) that periodically (since 2012, four volumes per year) produces a book entitled ''Chess Informant'', as well as the ''Encyclopaedia of Chess Op ...

categorized the

chess opening A chess opening or simply an opening is the initial stage of a chess game. It usually consists of established theory; the other phases are the middlegame and the endgame. Many opening sequences have standard names such as the "Sicilian Defe ...

s into five broad areas ("A" through "E"), with each of those broken down into one hundred subcategories ("00" through "99"). The openings were published in five volumes of ''ECO'', with volumes labeled "A" through "E". This is a list of chess openings by the ''ECO'' classification.

A – Flank openings

* White first moves other than 1.e4, 1.d4 (A00–A39) * 1.d4 without 1...d5, 1...Nf6 or 1...f5: Atypical replies to 1.d4 (A40–A44) * 1.d4 Nf6 without 2.c4: Atypical replies to 1...Nf6 (A45–A49) * 1.d4 Nf6 2.c4 without 2...e6 or 2...g6: Atypical Indian systems (A50–A79) * 1.d4 f5: Dutch Defence (A80–A99)

A00–A39

White first moves other than 1.e4, 1.d4: *A00 Irregular Openings :*

Anderssen's Opening Anderssen's Opening is a chess opening defined by the opening move: :1. a3 Anderssen's Opening is named after unofficial World Chess Champion Adolf Anderssen, who played it three times in his 1858 match against Paul Morphy. Although Anderssen was ...

: 1.a3 ::* Anderssen's Opening, Polish Gambit: 1...a5 2.b4 :::* Bugayev Attack 2...e5 ::* Anderssen's Opening, Creepy Crawly Formation: 1...e5 2.h3 d5 ::* Anderssen's Opening, Andersspike: 1...g6 2.g4 :*

Ware Opening The Ware Opening, also known as Meadow Hay Opening, is an uncommon chess opening for White beginning with the move: : 1. a4 It is named after Preston Ware, a U.S. chess player who often played uncommon openings. The Ware is considered an irregu ...

: 1.a4 ::* Ware Opening, Wing Gambit: 1...b5 2.axb5 Bb7 ::* Ware Opening, Ware Gambit: 1...e5 2.a5 d5 3.e3 f5 4.a6 ::* Ware Opening, Crab Variation: 1...e5 2.h4 :*

Durkin Opening The Durkin Opening (also known as the Durkin Attack or the Sodium Attack) is a rarely played chess opening. :1. Na3 The Durkin Opening is named for Robert T. Durkin (1923–2014) of New Jersey. The name "Sodium Attack" comes from the algebraic ...

: 1.Na3 ::* Sodium Attack, Durkin Gambit: 1...e5 2.Nc4 Nc6 3. e4 f5 :*

Polish Opening The Sokolsky Opening (also known as the Orangutan or 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 i ...

: 1.b4 ::* Polish Opening, Birmingham Gambit: 1...c5 ::* Polish Opening, Outflank Variation: 1...c6 ::* Polish Opening, Schuhler Gambit: 1...c6 2.Bb2 a5 3.b5 cxb5 4.e4 ::* Polish Opening, Myers Variation: 1...d5 2.Bb2 c6 3.a4 ::* Polish Opening, Bugayev Attack: 1...e5 2.a3 ::*Polish Opening, Wolferts Gambit: 1...e5 2.Bb2 c5 :* Saragossa Opening: 1.c3 :* Van Geet Opening: 1.Nc3 :* Van 't Kruijs Opening: 1.e3 :* Mieses Opening: 1.d3 :*

Barnes Opening The Barnes Opening (sometimes called Gedult's Opening) is a chess opening where White opens with: :1. f3 The opening is named after Thomas Wilson Barnes (1825–1874), an English player who had eight wins over Paul Morphy, including one game wh ...

: 1.f3 ::*Barnes Opening, Hammerschlag Variation: 1...e5 2.Kf2 :*

Benko's Opening The King's Fianchetto Opening or Benko's Opening (also known as the Hungarian Opening, Barcza Opening, or Bilek Opening) is a chess opening characterized by the move: :1. g3 White's 1.g3 ranks as the fifth most popular opening move, but it is far ...

: 1.g3 ::*Myers Defense 1...g5 :* Grob's Attack: 1.g4 :** Coca-Cola Gambit:1...g5 2.f4 :** Alessi Gambit: 1...f5 :*

Clemenz Opening The Clemenz Opening is a chess opening beginning with the move: :1. h3 This opening is named after Hermann Clemenz (1846–1908), an Estonian player. It is considered an irregular opening, and is classified under the code A00 (miscellaneous fir ...

: 1.h3 :* Desprez Opening: 1.h4 :*

Amar Opening The Amar Opening (also known as the Paris Opening, or the Drunken Knight Opening) is a chess opening defined by the move: : 1. Nh3 Analogous to calling the Durkin Opening the "Sodium Attack," this opening could be called the Ammonia Opening, sinc ...

: 1.Nh3 *A01 Larsen's Opening: 1.b3 :* Modern variation: 1...e5 :* Classical variation: 1...d5 :* Indian variation: 1...Nf6 :* Symmetrical variation: 1...b6 :* English variation: 1...c5 :* Polish variation: 1...b5 :* Dutch variation: 1...f5 *A02

Bird's Opening Bird's Opening (or the Dutch Attack) is a chess opening characterised by the move: :1. f4 Bird's is a standard flank opening. White's strategic ideas involve control of the e5-square, offering good attacking chances at the expense of slightly ...

: 1.f4 (Dutch Attack, without: 1...d5, 1...g6 2.e4, 1...Nf6 2.d4, 1...e5 2.e4, 1...c5 2.e4, 1...d6 2.e4) :* From's Gambit: 1...e5 (without: 2.e4) :* Symmetrical variation: 1...f5 *A03 Bird's Opening, Dutch Variation: 1...d5 (without: 2.d4) :* Mujannah-Sturm Gambit: 2.c4 :* Lasker variation: 2.e3 :* Williams Gambit: 2.e4 *A04 Réti Opening: 1.Nf3 (without: 1...Nf6, 1...d5, 1...c6 2.c4, 1...c6 2.d4, 1...c6 2.e4, 1...c6 2.g3 d5, 1...f5 2.c4, 1...f5 2.d4, 1...f5 2.e4 e5, 1...g6 2.c4, 1...g6 2.d4, 1...c5 2.c4, 1...c5 2.e4, 1...Nc6 2.e4, 1...e6 2.c4, 1...e6 2.d4, 1...e6 2.e4, 1...d6 2.c4, 1...d6 2.d4, 1...d6 2.e4, 1...b6 2.c4, 1...e5 2.e4, 1...a6 2.e4 e5) *A05 Réti Opening: 1...Nf6 (without: 2.c4, 2.d4, 2.Nc3, 2.g3 d5 2.d3 d5) *A06 Réti Opening: 1...d5 :* Santassiere's Folly: 2.b4 :* Nimzowitsch–Larsen Attack: 2.b3 *A07 Réti Opening,

King's Indian Attack The King's Indian Attack (or KIA), also known as the Barcza System (after Gedeon Barcza) is a chess opening for White, characterized by several moves. The center pawns are developed to e4 and d3, the knights are developed to d2 and f3, the king ...

(Barcza System): 1...d5 2.g3 :* Keres variation: 2...Bg4 :* Yugoslav variation: 2...c6 *A08 Réti Opening, King's Indian Attack: 1...d5 2.g3 c5 3.Bg2 *A09 Réti Opening: 1...d5 2.c4 (without: 2...c6, 2...e6) :* Advance variation: 2...d4 :* Accepted: 2...dxc4 *A10 English Opening: 1.c4 (without: 1...e5, 1...c5, 1...e6, 1...c6, 1...Nf6, 1...g6 2.d4, 1...f5 2.d4, 1...b6 2.d4, 1...d6 2.e4, 1...d6 2.d4, 1...Nc6 2.d4) :* English Anglo-Dutch: 1...f5 :* English Vector: 1...d5 :* English, Jaenisch Gambit: 1...b5 *A11 English, Caro–Kann defensive system, 1...c6 (without: 2.e4, 2.d4) *A12 English, Caro–Kann defensive system, 1...c6 2.Nf3 d5 3.b3 :* English Bogoljubov variation: 3...Bg4 :* English London Defence: 3...Nf6 4.g3 Bf5 *A13 English Opening: 1...e6 (without: 2.e4, 2.d4) *A14 English, Neo-Catalan declined: 1...e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 *A15 English, Anglo-Indian Defence: 1...Nf6 (without: 2.Nc3, 2.d4, 2.g3 c6, 2.g3 e5, 2.Nf3 c5, 2.Nf3 e6, 2.Nf3 c6) *A16 English Opening, Anglo-Indian Defence: 1...Nf6 2.Nc3 (without: 2...c5, 2...e5, 2...e6) :* Anglo-Grünfeld: 2...d5 *A17 English Opening,

Hedgehog Defence The hedgehog defence is a military tactic in which a defending army creates mutually supporting strongpoints in a defence in depth, designed to sap the strength and break the momentum of an attacking army. The strongpoints are designed to be e ...

, 1...Nf6 2.Nc3 e6 (without: 3.e4, 3.d4, 3.Nf3 c5, 3...d5 4.d4, 3...b5 4.d4, 3...Bb4 4.d4) *A18 English, Mikenas–Carls Variation: 1...Nf6 2.Nc3 e6 3.e4 (without: 3...c5) *A19 English, Mikenas–Carls, Sicilian Variation: 1...Nf6 2.Nc3 e6 3.e4 c5 *A20 English Opening: 1...e5 (without: 2.e4, 2.Nc3, 2.Nf3 Nc6 3.Nc3, 2.Nf3 Nf6 3.Nc3, 2.Nf3 d6 3.Nc3) *A21 English Opening: 1...e5 2.Nc3 (without: 2...Nf6, 2...Nc6, 2...Bb4 3.g3 Nf6, 2...Bb4 3.Nf3 Nc6 2...Bb4 3.e3 Nf6) *A22 English Opening: 1...e5 2.Nc3 Nf6 (without: 3.Nf3 Nc6, 3.e3 Nc6, 3.g3 Nc6, 3.g3 c6, 3.g3 g6, 3.e4 Nc6 4.Nf3) *A23 English Opening, Bremen System, Keres Variation: 1...e5 2.Nc3 Nf6 3.g3 c6 *A24 English Opening, Bremen System with 1...e5 2.Nc3 Nf6 3.g3 g6 (without: 4.Bg2 Bg7 5.d3 d6) *A25 English Opening, Sicilian Reversed: 1...e5 2 Nc3 Nc6 (without 3.Nf3, 3.g3 Nf6 4.Nf3, 3.e3 Nf6 4.Nf3) *A26 English Opening, Closed System: 1...e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 :* Botvinnik System: 6.e4 *A27 English Opening, Three Knights System: 1...e5 2.Nc3 Nc6 3.Nf3 (without: 3...Nf6) *A28 English Opening, Four Knights System: 1...e5 2.Nc3 Nc6 3.Nf3 Nf6 (without 4.g3) *A29 English Opening, Four Knights, Kingside Fianchetto: 1...e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3 *A30 English Opening, Symmetrical defence: 1.c4 c5 (without: 2.Nc3, 2.e4, 2.g3 g6 3.Nc3, 2.g3 Nc6 3.Nc3, 2.Nf3 Nc6 3.Nc3, 2.e3 Nf6 4.d4) *A31 English Opening, Symmetrical, Benoni formation: 1...c5 2.Nf3 Nf6 3.d4 (without: 3...cxd4 4.Nxd4 e6, 3...cxd4 4.Nxd4 a6 5.Nc3 e6, 3...cxd4 4.Nxd4 Nc6 5.Nc3 e6) *A32 English Opening, Symmetrical: 1...c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 (without: 5.Nc3 Nc6) *A33 English Opening, Symmetrical: 1...c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 :* Geller variation: 6.g3 Qb6 *A34 English Opening, Symmetrical: 1...c5 2.Nc3 (without 2...Nc6, 2...Nf6 3.Nf3 Nc6, 2...Nf6 3.e4 e6, 2...e6 3.Nf3 Nf6, 4.g3 Nc6) *A35 English Opening, Symmetrical: 1...c5 2.Nc3 Nc6 (without 3.g3, 3.e4, 3.Nf3 Nf6, 4.g3 e6, 3.Nf3 Nf6 4.d4 cxd4 5.Nxd4, 3.Nf3 e5 4.g3 g6 5.Bg2 Bg7) :* Four Knights: 3.e3 Nf6 4.Nf3 *A36 English Opening, Symmetrical: 1...c5 2.Nc3 Nc6 3.g3 (without: 3...g6 4.Bg2 Bg7 5.Nf3 (A37–A39), 3...g6 4.Bg2 Bg7 5.Rb1 Nf6 6.d3 0-0 7.Nf3 d6 8.0-0 (A38)) *A37 English Opening, Symmetrical: 1...c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 (without: 5...Nf6 (A38–A39)) *A38 English Opening, Symmetrical: 1...c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 (without: 6.0-0 0-0 7.d4 (A39) and 6.d4 cxd4 7.Nxd4 0-0 (A39)) *A39 English Opening, Symmetrical, Main line with 1...c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.0-0 0-0 7.d4 or 1...c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.d4 cxd4 7.Nxd4 0-0 8.0-0

A40–A44

1.d4 without 1...d5, 1...Nf6 or 1...f5: Atypical replies to 1.d4 *A40

Queen's Pawn Game Queen's Pawn Game broadly refers to any chess opening starting with the move 1.d4, which is the second most popular opening move after 1.e4 ( King's Pawn Game). Terminology The term "Queen's Pawn Game" is usually used to describe openings be ...

(including

English Defence The English Defence is a chess opening characterised by the moves: :1. d4 e6 :2. c4 b6 Description White often gains a broad with 3.e4, which Black puts pressure on with moves like ...Bb7, ...Bb4, and sometimes even ...Qh4 and/or ...f5. It ...

Englund Gambit The Englund Gambit is a rarely played chess opening that starts with the moves: :1. d4 e5 Black's idea is to avoid the traditional queen's pawn games and create an with tactical chances, but at the cost of a pawn. The gambit is considered wea ...

Queen's Knight Defence The Queen's Knight Defense (also known as the Nimzowitsch Queen Pawn Defence, Bogoljubov– Mikenas Defense or Lundin Defense) is a chess opening defined by the moves: :1. d4 Nc6 Unless the game transposes to another opening, the '' Encyc ...

, Polish Defence and

Keres Defence The Keres Defence (also known as the Kangaroo Defence or Franco-Indian Defence) is a chess opening characterised by the moves: :1. d4 e6 :2. c4 Bb4+ The opening is named for Estonian grandmaster Paul Keres. History This opening was known s ...

) *A41 Queen's Pawn Game,

Wade Defence The Wade Defence is a chess opening characterised by the initial moves: :1. d4 d6 :2. Nf3 Bg4 The position can also arise from the move order 1.Nf3 d6 2.d4 Bg4. History The opening is named after British IM Bob Wade (1921–2008), origin ...

*A42 Modern Defence, Averbakh System also

*A43 Old Benoni Defence *A44 Old Benoni Defence

A45–A49

1.d4 Nf6 without 2.c4: Atypical replies to 1...Nf6 *A45

Trompowsky Attack The Trompowsky Attack (or Trompowsky Opening, also known as the Opočenský Opening, the Ruth Opening, and the Zot) is a chess opening that begins with the moves: :1. d4 Nf6 :2. Bg5 White prepares to exchange the bishop for Black's knight, i ...

*A46 Queen's Pawn Game,

Torre Attack The Torre Attack is a chess opening characterized by the moves: :1. d4 Nf6 :2. Nf3 e6 :3. Bg5 ('' ECO'' code A46) or the Tartakower Variation in the Queen's Pawn Game (''ECO'' code D03): :2... d5 :3. Bg5 or the Torre Attack in the East ...

*A47

Queen's Indian Defence The Queen's Indian Defense (QID) is a chess opening defined by the moves: :1. d4 Nf6 :2. c4 e6 :3. Nf3 b6 The opening is a solid defense to the Queen's Pawn Game. 3...b6 increases Black's control over the central light squares e4 and d5 b ...

*A48

King's Indian The King's Indian Defence is a common chess opening. It is defined by the following moves: :1. d4 Nf6 :2. c4 g6 Black intends to follow up with 3...Bg7 and 4...d6 (the Grünfeld Defence arises when Black plays 3...d5 instead, and is consid ...

, East Indian Defence *A49 King's Indian, Fianchetto without c4

A50–A79

1.d4 Nf6 2.c4 without 2...e6 or 2...g6: Atypical Indian systems *A50

(including Black Knights' Tango) *A51

Budapest Gambit The Budapest Gambit (or Budapest Defence) is a chess opening that begins with the moves: :1. d4 Nf6 :2. c4 e5 Despite an early debut in 1896, the Budapest Gambit received attention from leading players only after a win as Black by Grandmast ...

declined *A52 Budapest Gambit *A53

Old Indian Defence The Old Indian Defense is a chess opening defined by the moves: :1. d4 Nf6 :2. c4 d6 This opening is distinguished from the King's Indian Defense in that Black develops their on e7 rather than by fianchetto on g7. Mikhail Chigorin pioneer ...

*A54 Old Indian, Ukrainian Variation *A55 Old Indian, Main line *A56

Benoni defence The Benoni Defense is a chess opening characterized by an early reply of ...c5 against White's opening move 1.d4. Most commonly, it is reached by the sequence: :1. d4 Nf6 :2. c4 c5 :3. d5 Black can then sacrifice a pawn with 3...b5 (the Ben ...

*A57 Benko Gambit *A58 Benko Gambit Accepted *A59 Benko Gambit, 7.e4 *A60 Benoni defence *A61 Benoni defence *A62 Benoni, Fianchetto Variation without early ...Nbd7 *A63 Benoni, Fianchetto Variation, 9...Nbd7 *A64 Benoni, Fianchetto Variation, 11...Re8 *A65 Benoni, 6.e4 *A66 Benoni, Pawn Storm Variation *A67 Benoni, Taimanov Variation *A68 Benoni, Four Pawns Attack *A69 Benoni, Four Pawns Attack, Main line *A70 Benoni, Classical with e4 and Nf3 *A71 Benoni, Classical, 8.Bg5 *A72 Benoni, Classical without 9.0-0 *A73 Benoni, Classical, 9.0-0 *A74 Benoni, Classical, 9...a6, 10.a4 *A75 Benoni, Classical with ...a6 and 10...Bg4 *A76 Benoni, Classical, 9...Re8 *A77 Benoni, Classical, 9...Re8, 10.Nd2 *A78 Benoni, Classical with ...Re8 and ...Na6 *A79 Benoni, Classical, 11.f3

A80–A99

1.d4 f5: Dutch Defence *A80 Dutch Defence (without 2.c4 (A84–A99), 2.e4 (A82–A83), 2.g3 (A81)) **Korchnoi Attack 2.h3 *A81 Dutch Defence 2.g3 *A82 Dutch, Staunton Gambit 2.e4 ** Balogh Defence 2...d6 **Staunton Gambit Accepted 2...fxe4 (without 3.Nc3 Nf6 4.Bg5 (A83)) *A83 Dutch, Staunton Gambit, Staunton's line 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 *A84 Dutch Defence 2.c4 (without 2...Nf6 3.Nc3 (A85), 2...Nf6 3.g3 (A86–A99)) *A85 Dutch with 2.c4 Nf6 3.Nc3 *A86 Dutch with 2.c4 Nf6 3.g3 (without 3...g6 4.Bg2 Bg7 5.Nf3 (A87) and 3...e6 4.Bg2 (A90–A99)) *A87 Dutch, Leningrad, Main Variation 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 (without 5...0-0 6.0-0 d6 7.Nc3 c6 (A88) and 7...Nc6 (A89)) *A88 Dutch, Leningrad, Main Variation with 5...0-0 6.0-0 d6 7.Nc3 c6 *A89 Dutch, Leningrad, Main Variation with 5...0-0 6.0-0 d6 7.Nc3 Nc6 *A90 Dutch Defence 2.c4 Nf6 3.g3 e6 4.Bg2 (without 4...Be7 (A91–A99)) *A91 Dutch Defence 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 (without 5.Nf3 (A92–A99)) *A92 Dutch Defence 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 (without 6.0-0 (A93–A99)) *A93 Dutch, Stonewall, Botvinnik Variation 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d5 7. b3 (without 7...c6 8.Ba3 (A94)) *A94 Dutch, Stonewall with 6.0-0 d5.7.b3 c6 8.Ba3 *A95 Dutch, Stonewall with 6.0-0 d5.7.Nc3 c6 *A96 Dutch, Classical Variation 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d6 (without 7.Nc3 Qe8 (A97–A99)) *A97 Dutch, Ilyin–Genevsky Variation 7.Nc3 Qe8 (without 8.Qc2 (A98) and 8.b3 (A99)) *A98 Dutch, Ilyin–Genevsky Variation with 7.Nc3 Qe8 8.Qc2 *A99 Dutch, Ilyin–Genevsky Variation with 7.Nc3 Qe8 8.b3

B – Semi-Open Games other than the French Defense

* 1.e4 without 1...c5, 1...e6 or 1...e5 (B00–B19) * 1.e4 c5: Sicilian Defence (B20–B99)

B00–B19

1.e4 without 1...c5, 1...e6 or 1...e5 *B00

King's Pawn Opening The King's Pawn Game is any chess opening starting with the move: :1. e4 It is the most popular opening move in chess, followed by the Queen's Pawn Game. Details about the move and the game plan White opens with the most popular of the twent ...

without 1...e5, 1...e6, 1...d5, 1...Nf6, 1...g6, 1...d6, 1...c6, 1...c5. **

Nimzowitsch Defence The Nimzowitsch Defence (named after Aron Nimzowitsch) is a somewhat unusual chess opening characterised by the moves: :1. e4 Nc6 This opening is an example of a hypermodern opening in which Black invites White to occupy the of the board a ...

1...Nc6 (without 2.Nf3 e5 (C44, C50, C60)) ** St. George Defence 1...a6 (without 2.d4 e6 (C00)) ** Cornstalk Defence 1 ...a5 **

Owen's Defence Owen's Defence (also known as the Queen's Fianchetto Defence or Greek Defence) is an uncommon chess opening defined by the moves: :1. e4 b6 By playing 1...b6, Black prepares to fianchetto the where it will participate in the battle for the . ...

(Greek Defence) 1...b6 (without 2.d4 e6 3.c4 (A40)) *** Matinovsky Gambit 1...b6 2.d4 Bb7 3...f5 **

Hippopotamus Defence The Hippopotamus Defence refers to various irregular chess openings in which Black moves a number of pawns to the sixth , often developing pieces to the seventh rank, and does not move any pawns to the fifth rank in the opening. As an , it can als ...

** and others *B01

Scandinavian Defence The Scandinavian Defense (or Center Counter Defense, or Center Counter Game) is a chess opening characterized by the moves: :1. e4 d5 This opening is classified under code B01 in the ''Encyclopaedia of Chess Openings'' (). The Scandinavian ...

(Center Counter Defence) 1...d5 ** Tennison Gambit 2.Nf3 *B02

Alekhine's Defence The Alekhine's Defence is a chess opening that begins with the moves: :1. e4 Nf6 Black tempts White's pawns forward to form a broad , with plans to undermine and attack the white structure later in the spirit of hypermodern defence. White's im ...

**B03 Alekhine's Defence 3.d4 **B04 Alekhine's Defence, Modern Variation **B05 Alekhine's Defence, Modern Variation, 4...Bg4 *B06 Robatsch (Modern) Defence, including Monkey's Bum *B07 Pirc Defence **B08 Pirc, Classical (Two Knights) System **B09 Pirc, Austrian attack *B10 Caro-Kann Defence **B11 Caro–Kann, Two knights, 3...Bg4 **B12 Caro–Kann Defence **B13 Caro–Kann, Exchange Variation **B14 Caro–Kann, Panov–Botvinnik Attack, 5...e6 **B15 Caro–Kann Defence **B16 Caro–Kann, Bronstein–Larsen Variation **B17 Caro–Kann, Steinitz Variation, Smyslov Systems **B18 Caro–Kann, Classical Variation **B19 Caro–Kann, Classical, 7...Nd7

B20–B99

1.e4 c5: Sicilian Defence *B20 Sicilian Defence, (any move for white without 2.Nc3 (B23–B26), 2.c3 (B22), 2.f4 (B21) and 2.Nf3 (B27–B99)) ** Smith-Morra Gambit, 2.d4 (without 2...e6 (C00) and 2.d4 cxd4 3.c3 g6 (B22)) with

Siberian Trap Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a part of ...

2.d4 cxd4 3.c3 dxc3... ***Sicilian Smith-Morra Morphy Gambit, 2.d4 cxd4 3.Nf3 (without 3...Nc6 (B32), 3...e6 (B40), 3...d6 (B53), 3...a6 4.Nxd4 (B28)) ***Sicilian Halasz Gambit, 2.d4 cxd4 3.f4 *B21 Sicilian, Grand Prix Attack, 2.f4 (without 2...e5 (C30)) *B22 Sicilian, Alapin Variation, 2.c3 (without 2...d6 3.Nf3 (C50), 2...e6 3.Nf3 d5 (B40), 2...e6 3.d4 d5 4.e5 (C02), 2...g6 3.Nf3 (B27)) *B23 Sicilian, Closed, 2.Nc3 (without 2...a6 3.Nf3 (B28), 2...d6 3.Nf3 (B50), 2...Nc6 3.g3 (B24–B26)) *B24 Sicilian, Closed, 2.Nc3 Nc6 3.g3 (without 3...g6 (B25–B26)) *B25 Sicilian, Closed, 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 (without 6.Be3 (B26)) *B26 Sicilian, Closed, 6.Be3 *B27 Sicilian Defence, 2.Nf3 (without 2...a6 (B28), 2...Nc6 (B30), 2...d6 (B50), 2...e6 (B40), 2...Nf6 (B29)) ** Katalimov Variation, 2...b6 ** Hungarian Variation, 2...g6 ** Quinteros Variation, 2...Qc7 ** Mongoose Variation, 2...Qa5 *B28 Sicilian, O'Kelly Variation, 2.Nf3 a6 (without 3.d4 cxd4 4.Nxd4 e6 (B41, B43)) *B29 Sicilian, Nimzovich–Rubinstein Variation, 2.Nf3 Nf6 (without 3.e5 Nd5 4.c3 (B22), 3.Nc3 Nc6 (B30), 3.Nc3 d6 (B50), 3.d4 cxd4 4.Nxd4 d6 (B54, B56, B94–B99)) *B30 Sicilian Defence, 2.Nf3 Nc6 (without 3.Bb5 g6 (B31) 3.Bb5 d6 (B51)) ** Sicilian, Rossolimo Variation, 3.Bb5 *B31 Sicilian, Nimzovich–Rossolimo Attack, 3.Bb5 g6 *B32 Sicilian Defence, 2.Nf3 Nc6 3.d4 (without 3...cxd4 4.Nxd4 Nf6 (B33), 4...e6 (B44–B47) 4...g6 (B34)) *B33 Sicilian, Sveshnikov (Lasker–Pelikan) Variation, 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 (without 5.Nc3 e6 (B45) 5...g6 (B34) 5...d6 (B56)) *B34 Sicilian, Accelerated Fianchetto, Exchange Variation, 2.Nf3 Nc6 3 d4.cxd4 4.Nxd4 g6 (without 5.c4 (B36), 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 (B35)) *B35 Sicilian, Accelerated Fianchetto, Modern Variation with 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 (without 7...b6 (B72, B75)) *B36 Sicilian, Accelerated Fianchetto, Maroczy bind 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 (without 5...Bg7 (B37–B39)) *B37 Sicilian, Accelerated Fianchetto, Maroczy bind, 5...Bg7 (without 6.Be3 (B38)) *B38 Sicilian, Accelerated Fianchetto, Maroczy bind, 5...Bg7 6.Be3 (without 6...Nf6 7.Nc3 Ng4 (B39)) *B39 Sicilian, Accelerated Fianchetto, Breyer Variation, 5...Bg7 6.Be3 Nf6 7.Nc3 Ng4 *B40 Sicilian Defence, 2.Nf3 e6 *B41 Sicilian, Kan Variation, 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 (without 5.Bd3 (B42), 5.Nc3 (B43), 5.Be2 Nf6 6.Nc3 Qc7 (B43)) *B42 Sicilian, Kan, 5.Bd3 *B43 Sicilian, Kan, 5.Nc3 *B44 Sicilian Defence, 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 *B44 Sicilian, Szén Variation (5.Nb5) *B45 Sicilian, Taimanov Variation, 5.Nc3 *B46 Sicilian, Taimanov Variation *B47 Sicilian, Taimanov (Bastrikov) variation *B48 Sicilian, Taimanov Variation *B49 Sicilian, Taimanov Variation *B50 Sicilian Defense *B51 Sicilian, Canal–Sokolsky Attack *B52 Sicilian, Canal–Sokolsky Attack, 3...Bd7 *B53 Sicilian, Chekhover Variation *B54 Sicilian *B55 Sicilian, Prins Variation, Venice Attack *B56 Sicilian *B57 Sicilian, Sozin (not Scheveningen) including Magnus Smith Trap *B58 Sicilian, Classical *B59 Sicilian, Boleslavsky Variation, 7.Nb3 *B60 Sicilian, Richter-Rauzer *B61 Sicilian, Richter–Rauzer, Larsen Variation, 7.Qd2 *B62 Sicilian, Richter–Rauzer, 6...e6 *B63 Sicilian, Richter–Rauzer, Rauzer Attack *B64 Sicilian, Richter–Rauzer, Rauzer Attack, 7...Be7 defence, 9.f4 *B65 Sicilian, Richter–Rauzer, Rauzer Attack, 7...Be7 defence, 9...Nxd4 *B66 Sicilian, Richter–Rauzer, Rauzer Attack, 7...a6 *B67 Sicilian, Richter–Rauzer, Rauzer Attack, 7...a6 defence, 8...Bd7 *B68 Sicilian, Richter–Rauzer, Rauzer Attack, 7...a6 defence, 9...Be7 *B69 Sicilian, Richter–Rauzer, Rauzer Attack, 7...a6 defence, 11.Bxf6 *B70 Sicilian, Dragon Variation *B71 Sicilian, Dragon, Levenfish Attack *B72 Sicilian, Dragon, 6.Be3 *B73 Sicilian, Dragon, Classical, 8.0-0 *B74 Sicilian, Dragon, Classical, 9.Nb3 *B75 Sicilian, Dragon, Yugoslav Attack *B76 Sicilian, Dragon, Yugoslav Attack, 7...0-0 *B77 Sicilian, Dragon, Yugoslav Attack, 9.Bc4 *B78 Sicilian, Dragon, Yugoslav Attack, 10.0-0-0 *B79 Sicilian, Dragon, Yugoslav Attack, 12.h4 *B80 Sicilian, Scheveningen Variation *B80 Sicilian, Scheveningen, English Attack *B81 Sicilian, Scheveningen, Keres Attack *B82 Sicilian, Scheveningen, 6.f4 *B83 Sicilian, Scheveningen, 6.Be2 *B84 Sicilian, Scheveningen (Paulsen), Classical Variation *B85 Sicilian, Scheveningen, Classical Variation with ...Qc7 and ...Nc6 *B86 Sicilian, Sozin Attack *B87 Sicilian, Sozin with ...a6 and ...b5 *B88 Sicilian, Sozin, Leonhardt Variation *B89 Sicilian, Sozin, 7.Be3 *B90 Sicilian, Najdorf *B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation (6.g3) *B92 Sicilian, Najdorf, Opocensky Variation (6.Be2) *B93 Sicilian, Najdorf, 6.f4 *B94 Sicilian, Najdorf, 6.Bg5 *B95 Sicilian, Najdorf, 6...e6 *B96 Sicilian, Najdorf, 7.f4 *B97 Sicilian, Najdorf, 7...Qb6 including

Poisoned Pawn Variation The Poisoned Pawn Variation is any of several series of opening moves in chess in which a pawn is said to be "poisoned" because its capture can result in a positional loss of or a loss of . Sicilian Defense, Najdorf The best known of thes ...

*B98 Sicilian, Najdorf, 7...Be7 *B99 Sicilian, Najdorf, 7...Be7 Main line

C – Open Games and the French Defense

* 1.e4 e6: French Defence (C00–C19) * 1.e4 e5: Open Game (C20–C99)

C00–C19

1.e4 e6: French Defence *C00 French Defence *C01 French, Exchange Variation *C02 French, Advance Variation *C03 French, Tarrasch *C04 French, Tarrasch, Guimard Main line *C05 French, Tarrasch, Closed Variation *C06 French, Tarrasch, Closed Variation, Main line *C07 French, Tarrasch, Open Variation *C08 French, Tarrasch, Open, 4.exd5 exd5 *C09 French, Tarrasch, Open Variation, Main line *C10 French, Paulsen Variation *C11 French Defence *C12 French, MacCutcheon Variation *C13 French, Classical *C14 French, Classical Variation *C15 French, Winawer (Nimzovich) Variation *C16 French, Winawer, Advance Variation *C17 French, Winawer, Advance Variation *C18 French, Winawer, Advance Variation *C19 French, Winawer, Advance, 6...Ne7

C20–C99

1.e4 e5: Open Game *C20

King's Pawn Game The King's Pawn Game is any chess opening starting with the move: :1. e4 It is the most popular opening move in chess, followed by the Queen's Pawn Game. Details about the move and the game plan White opens with the most popular of the twent ...

(includes Alapin's Opening, Centre Pawn Opening,

Napoleon Opening The Napoleon Opening is an irregular chess opening starting with the moves: :1. e4 e5 :2. Qf3 As with the similar Danvers Opening (2.Qh5), White hopes for the Scholar's mate (2...Nc6 3.Bc4 Bc5 4.Qxf7), but Black can easily avoid the attack. ...

, Portuguese Opening,

Danvers Opening The Danvers Opening,''Edward Winter''at chesshistory.com also known as the Kentucky Opening,''The_Talking_Drum_featuring_Bernard_Parham''_6_July_2003_is_an_unorthodox_chess_opening_characterized_by_the_moves: :1._ ''The_Talking_Drum_featuring_Ber ...

, Bongcloud Attack) *C21

Center Game The Center Game is a chess opening that begins with the moves: :1. e4 e5 :2. d4 exd4 The game usually continues 3.Qxd4 Nc6, with a gain of tempo for Black due to the attack on the white queen. (Note that 3.c3 is considered a separate open ...

(includes

Danish Gambit The Danish Gambit, known as the ' in German and the ' in Dutch (both meaning Nordic Gambit), is a chess opening that begins with the moves: :1. e4 e5 :2. d4 exd4 :3. c3 White will sacrifice one or two pawns for the sake of rapid and the att ...

) *C22 Center Game *C23

Bishop's Opening The Bishop's Opening is a chess opening that begins with the moves: :1. e4 e5 :2. Bc4 White attacks Black's f7-square and prevents Black from advancing the d-pawn to d5. By ignoring the beginner's maxim "develop knights before bishops", White ...

*C24 Bishop's Opening, Berlin Defence *C25

Vienna Game The Vienna Game is an opening in chess that begins with the moves: :1. e4 e5 :2. Nc3 White's second move is less common than 2.Nf3, and is also more recent. The original idea behind the Vienna Game was to play a delayed King's Gambit with ...

*C26 Vienna Game, Falkbeer Variation *C27 Vienna Game, Frankenstein–Dracula Variation *C28 Vienna Game *C29 Vienna Gambit, Kaufmann Variation including

Würzburger Trap Bukettraube (''/bu-ket-trau-be/''), also called Bouquet Blanc, Bouquettraube, Sylvaner Musqué or Bukettrebe, is a variety of white grape of German origin. Sebastian Englerth is supposed to have created it in Randersacker in the 19th centur ...

*C30 King's Gambit *C31 King's Gambit Declined, Falkbeer and Nimzowitsch (3...c6) Countergambits *C32 King's Gambit Declined, Falkbeer, 5.dxe4 *C33 King's Gambit Accepted *C34 King's Gambit Accepted, including Fischer Defence *C35 King's Gambit Accepted, Cunningham Defence *C36 King's Gambit Accepted, Abbazia Defence (Classical Defence, Modern Defence) *C37 King's Gambit Accepted, Quaade Gambit or McDonnell Gambit *C38 King's Gambit Accepted *C39 King's Gambit Accepted, Allgaier and Kieseritzky Gambits including Rice Gambit *C40

King's Knight Opening The King's Knight Opening is a chess opening consisting of the moves: :1. e4 e5 :2. Nf3 White's second move attacks the e-pawn. Black usually defends this with 2...Nc6, which leads to several named openings. Of the alternatives, the most imp ...

(includes Gunderam Defence, Brazilian Defense,

Greco Defence The Greco Defence (or McConnell Defence), named after Gioachino Greco (c. 1600 – c. 1634), is a chess opening that begins with the moves: :1. e4 e5 :2. Nf3 Qf6 The opening is categorised by ''Encyclopaedia of Chess Openings'' as code C40. ...

, Damiano Defence,

Elephant Gambit The Elephant Gambit (also called the Queen's Pawn Countergambit or Englund Counterattack) is a rarely played chess opening beginning with the moves: :1. e4 e5 :2. Nf3 d5 Although the Elephant Gambit is considered unsound, it has been used fr ...

, and Latvian Gambit.) *C41 Philidor Defence *C42 Petrov's Defence, including Marshall Trap *C43 Petrov's Defence, Modern (Steinitz) Attack *C44 King's Pawn Game (includes Ponziani Opening, Inverted Hungarian Opening,

Irish Gambit The Irish Gambit, Chicago Gambit, or Razzle Dazzle Gambit is a weak chess opening that begins: :1. e4 e5 :2. Nf3 Nc6 :3. Nxe5? intending 3...Nxe5 4.d4. Discussion White's pawns occupy the , but the sacrifice of a knight for a pawn is a v ...

, Konstantinopolsky Opening and some

Scotch Game The Scotch Game, or Scotch Opening, is a chess opening that begins with the moves: :1. e4 e5 :2. Nf3 Nc6 :3. d4 Ercole del Rio, in his 1750 treatise ''Sopra il giuoco degli Scacchi, Osservazioni pratiche d’anonimo Autore Modenese'' ("On t ...

) *C45

*C46

Three Knights Game The Three Knights Game is a chess opening which most commonly begins with the moves: :1. e4 e5 :2. Nf3 Nc6 :3. Nc3 In the Three Knights Game, Black chooses to break symmetry in order to avoid the main lines of what is often considered the ...

including Halloween Gambit *C47 Four Knights Game *C48 Four Knights Game, Spanish Variation *C49 Four Knights Game, Double Ruy Lopez *C50 Italian Game (includes Blackburne Shilling Gambit, Hungarian Defense, Semi-Italian Opening,

Italian Gambit The Italian Gambit is a chess opening that begins with the moves: :1. e4 e5 :2. Nf3 Nc6 :3. Bc4 Bc5 :4. d4 It is often played as an alternative to the quiet and closed lines of the Giuoco Piano or Giuoco Pianissimo openings. Black can: * ...

, Légal Trap, Rousseau Gambit, Koltanowski Gambit and

Giuoco Pianissimo The Giuoco Piano ( Italian: "Quiet Game"; ), also called the Italian Opening, is a chess opening beginning with the moves: :1. e4 e5 :2. Nf3 Nc6 :3. Bc4 Bc5 "White aims to develop quickly – but so does Black. White can construct a pawn ce ...

) *C51

Evans Gambit The Evans Gambit is a chess opening characterised by the moves: :1. e4 e5 :2. Nf3 Nc6 :3. Bc4 Bc5 :4. b4 The Evans Gambit is an aggressive line of the Giuoco Piano. White offers a pawn to divert the black bishop on c5. If Black accepts, ...

*C52 Evans Gambit with 4...Bxb4 5.c3 Ba5 *C53 Giuoco Piano *C54 Giuoco Piano *C55

Two Knights Defence The Two Knights Defense is a chess opening that begins with the moves: :1. e4 e5 :2. Nf3 Nc6 :3. Bc4 Nf6 First recorded by Giulio Cesare Polerio (c. 1550 – c. 1610) in the late 16th century, this line of the Italian Game was extensiv ...

*C56 Two Knights Defence *C57 Two Knights Defence, including the

Fried Liver Attack The Fried Liver Attack, also called the Fegatello Attack (named after an Italian dish), is a chess opening. This opening is a variation of the Two Knights Defense in which White sacrifices a knight for an attack on Black's king. The opening begin ...

*C58 Two Knights Defence *C59 Two Knights Defence *C60

Ruy Lopez The Ruy Lopez (; ), also called the Spanish Opening or Spanish Game, is a chess opening characterised by the moves: :1. e4 e5 :2. Nf3 Nc6 :3. Bb5 The Ruy Lopez is named after 16th-century Spanish priest Ruy López de Segura. It is one o ...

Unusual Black 3rd moves and 3...g6 *C61 Ruy Lopez, Bird's Defence *C62 Ruy Lopez, Old Steinitz Defence *C63 Ruy Lopez, Schliemann Defence *C64 Ruy Lopez, Classical (Cordel) Defence *C65 Ruy Lopez, Berlin Defence including Mortimer Trap *C66 Ruy Lopez, Berlin Defence, 4.0-0 d6 *C67 Ruy Lopez, Berlin Defence, Open Variation *C68

Ruy Lopez, Exchange Variation The Exchange Variation of the Ruy Lopez is a chess opening that begins with the moves: :1. e4 e5 :2. Nf3 Nc6 :3. Bb5 a6 :4. Bxc6 Black may recapture on c6 with either pawn; although 4...bxc6 is playable, 4...dxc6 is almost always chosen ...

*C69 Ruy Lopez, Exchange Variation, 5.0-0 *C70

, 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 *C71 Ruy Lopez, Modern Steinitz Defence including Noah's Ark Trap *C72 Ruy Lopez, Modern Steinitz Defence 5.0-0 *C73 Ruy Lopez, Modern Steinitz Defence, Richter Variation *C74 Ruy Lopez, Modern Steinitz Defence *C75 Ruy Lopez, Modern Steinitz Defence *C76 Ruy Lopez, Modern Steinitz Defence, Fianchetto (Bronstein) Variation *C77 Ruy Lopez, Morphy Defence *C78 Ruy Lopez, 5.0-0 *C79 Ruy Lopez, Steinitz Defence Deferred (Russian Defence) *C80 Ruy Lopez, Open (Tarrasch) Defence *C81 Ruy Lopez, Open, Howell Attack *C82 Ruy Lopez, Open, 9.c3 *C83 Ruy Lopez, Open, Classical Defence *C84 Ruy Lopez, Closed Defence *C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) *C86 Ruy Lopez, Worrall Attack *C87 Ruy Lopez, Closed, Averbakh Variation *C88 Ruy Lopez, Closed *C89 Ruy Lopez, Marshall Counterattack *C90 Ruy Lopez, Closed, 7...d6 *C90 Ruy Lopez, Closed, 7...d6, 9.d3 (Pilnik Variation) *C91 Ruy Lopez, Closed, 9.d4 *C92 Ruy Lopez, Closed, 9.h3 *C92 Ruy Lopez, Closed, 9.h3 Bb7 (Zaitsev Variation) *C93 Ruy Lopez, Closed, Smyslov Defence *C94 Ruy Lopez, Closed, Breyer Defence, 10.d3 *C95 Ruy Lopez, Closed, Breyer Defence, 10.d4 *C96 Ruy Lopez, Closed, 8...Na5 *C97 Ruy Lopez, Closed, Chigorin Defence *C98 Ruy Lopez, Closed, Chigorin, 12...Nc6 *C99 Ruy Lopez, Closed, Chigorin, 12...cxd4

D – Closed Games and Semi-Closed Games

* 1.d4 d5:

Closed Game A Closed Game (or Double Queen's Pawn Opening) is a chess opening that begins with the moves: :1. d4 d5 The move 1.d4 offers the same benefits to and as does 1.e4, but unlike with the king's pawn openings where the e4-pawn is undefended after ...

(D00–D69) * 1.d4 Nf6 2.c4 g6 with 3...d5:

Grünfeld Defence The Grünfeld Defence is a chess opening characterised by the moves: :1. d4 Nf6 :2. c4 g6 :3. Nc3 d5 Black offers White the possibility of 4.cxd5, which may be followed by 4...Nxd5 and 5.e4, giving White an imposing central pawn duo. If Whi ...

(D70–D99)

D00–D69

1.d4 d5:

*D00

(including

Blackmar–Diemer Gambit The Blackmar–Diemer Gambit (or BDG) is a chess opening characterized by the moves: :1. d4 d5 :2. e4 dxe4 :3. Nc3 where White intends to follow up with f2–f3, usually on the fourth move. White obtains a tempo and a half-open f-file in re ...

, Halosar Trap and others) *D01

Richter–Veresov Attack The Richter–Veresov Attack (or Veresov Opening) is a chess opening that begins with the moves: :1. d4 d5 :2. Nc3 Nf6 :3. Bg5 It is also often reached by transposition, for example 1.d4 Nf6 2.Nc3 d5 3.Bg5 (the most common move order), 1.d ...

*D02 Queen's Pawn Game, 2.Nf3 (including the

London System The London System, also known as the Mason Variation, is an in chess where White opens with 1.d4 but does not play the Queen's Gambit, instead opting to rapidly develop the . This often results in a . The London System can be used against vir ...

) *D03

, Tartakower Variation *D04 Queen's Pawn Game,

Colle System The Colle System, also known as the Colle-Koltanowski System, is a chess opening for White, popularized in the 1920s by the Belgian master Edgard Colle and further developed by George Koltanowski. The Colle is characterized by several moves ...

*D05 Queen's Pawn Game, Zukertort Variation (including

Colle system The Colle System, also known as the Colle-Koltanowski System, is a chess opening for White, popularized in the 1920s by the Belgian master Edgard Colle and further developed by George Koltanowski. The Colle is characterized by several moves ...

) *D06

Queen's Gambit The Queen's Gambit is the chess opening that starts with the moves: :1. d4 d5 :2. c4 It is one of the oldest openings and is still commonly played today. It is traditionally described as a '' gambit'' because White appears to sacrifice the ...

(including the Baltic Defence, Marshall Defence and Symmetrical Defence) *D07 QGD; Chigorin Defence *D08 QGD;

Albin Countergambit The Albin Countergambit is a chess opening that begins with the moves: :1. d4 d5 :2. c4 e5 and the usual continuation is: :3. dxe5 d4 The opening is an uncommon defense to the Queen's Gambit. In exchange for the gambit pawn, Black has a ...

and Lasker Trap *D09 QGD; Albin Countergambit, 5.g3 *D10 QGD;

Slav Defence The Slav Defense is a chess opening that begins with the moves: :1. d4 d5 :2. c4 c6 The Slav is one of the primary defenses to the Queen's Gambit. Although it was analyzed as early as 1590, it was not until the 1920s that it started to be e ...

*D11 QGD; Slav Defence, 3.Nf3 *D12 QGD; Slav Defence, 4.e3 Bf5 *D13 QGD; Slav Defence, Exchange Variation *D14 QGD; Slav Defence, Exchange Variation *D15 QGD; Slav, 4.Nc3 *D16 QGD; Slav accepted, Alapin Variation *D17 QGD; Slav Defence, Czech Defence *D18 QGD; Dutch Variation *D19 QGD; Dutch Variation *D20 Queen's Gambit Accepted *D21 QGA, 3.Nf3 *D22 QGA; Alekhine Defence *D23 Queen's Gambit Accepted *D24 QGA, 4.Nc3 *D25 QGA, 4.e3 *D26 QGA; Classical Variation *D27 QGA; Classical Variation *D28 QGA; Classical Variation 7.Qe2 *D29 QGA; Classical Variation 8...Bb7 *D30

Queen's Gambit Declined The Queen's Gambit Declined (or QGD) is a chess opening in which Black declines a pawn offered by White in the Queen's Gambit: :1. d4 d5 :2. c4 e6 This is known as the ''Orthodox Line'' of the Queen's Gambit Declined. When the "Queen's Gambi ...

: Orthodox Defence *D31 QGD, 3.Nc3 *D31 QGD, Semi-Slav, Abrahams–Noteboom Variation 10...Bb7 *D32 QGD; Tarrasch Defence *D33 QGD; Tarrasch, Schlechter–Rubinstein System *D34 QGD; Tarrasch, 7...Be7 *D35 QGD; Exchange Variation *D36 QGD; Exchange, positional line, 6.Qc2 *D37 QGD; 4.Nf3 *D37 QGD; 4.Nf3 Be7 5.Bf4 (Harrwitz Attack) *D38 QGD; Ragozin Variation *D39 QGD; Ragozin, Vienna Variation *D40 QGD; Semi-Tarrasch Defence *D41 QGD; Semi-Tarrasch, 5.cxd5 *D42 QGD; Semi-Tarrasch, 7.Bd3 *D43 QGD; Semi-Slav Defence *D44 QGD; Semi-Slav 5.Bg5 dxc4 *D45 QGD; Semi-Slav 5.e3 *D46 QGD; Semi-Slav 6.Bd3 *D47 QGD; Semi-Slav 7.Bc4 *D48 QGD; Meran, 8...a6 *D49 QGD; Meran, 11.Nxb5 *D50 QGD; 4.Bg5 *D51 QGD; 4.Bg5 Nbd7 (

Cambridge Springs Defence In chess, the Cambridge Springs Defense (or less commonly, the Pillsbury Variation) is a variation of the Queen's Gambit Declined that begins with the moves: :1. d4 d5 :2. c4 e6 :3. Nc3 Nf6 :4. Bg5 Nbd7 :5. Nf3 c6 :6. e3 Qa5 Black b ...

and Elephant Trap) *D52 QGD *D53 QGD; 4.Bg5 Be7 *D54 QGD; Anti-neo-Orthodox Variation *D55 QGD; 6.Nf3 *D56 QGD; Lasker Defence *D57 QGD; Lasker Defence, Main line *D58 QGD; Tartakower (Tartakower–Makogonov–Bondarevsky) System *D59 QGD; Tartakower (Tartakower–Makogonov–Bondarevsky) System, 8.cxd5 Nxd5 *D60 QGD; Orthodox Defence *D61 QGD; Orthodox Defence, Rubinstein Variation *D62 QGD; Orthodox Defence, 7.Qc2 c5, 8.cxd5 (Rubinstein) *D63 QGD; Orthodox Defence, 7.Rc1 *D64 QGD; Orthodox Defence, Rubinstein Attack (with Rc1) *D65 QGD; Orthodox Defence, Rubinstein Attack, Main line *D66 QGD; Orthodox Defence, Bd3 line including Rubinstein Trap *D67 QGD; Orthodox Defence, Bd3 line, Capablanca freeing manoeuvre *D68 QGD; Orthodox Defence, Classical Variation *D69 QGD; Orthodox Defence, Classical, 13.dxe5

D70–D99

1.d4 Nf6 2.c4 g6 with 3...d5:

* D70 Neo-Grünfeld Defence *D71 Neo-Grünfeld, 5.cxd5 *D72 Neo-Grünfeld, 5.cxd5, Main line *D73 Neo-Grünfeld, 5.Nf3 *D74 Neo-Grünfeld, 6.cxd5 Nxd5, 7.0-0 *D75 Neo-Grünfeld, 6.cxd5 Nxd5, 7.0-0 c5, 8.Nc3 *D76 Neo-Grünfeld, 6.cxd5 Nxd5, 7.0-0 Nb6 *D77 Neo-Grünfeld, 6.0-0 *D78 Neo-Grünfeld, 6.0-0 c6 *D79 Neo-Grünfeld, 6.0-0, Main line *D80

*D81 Grünfeld; Russian Variation *D82 Grünfeld 4.Bf4 *D83 Grünfeld Gambit *D84 Grünfeld Gambit accepted *D85 Grünfeld, Nadanian Variation *D86 Grünfeld, Exchange, Classical Variation *D87 Grünfeld, Exchange, Spassky Variation *D88 Grünfeld, Spassky Variation, Main line, 10...cxd4, 11.cxd4 *D89 Grünfeld, Spassky Variation, Main line, 13.Bd3 *D90 Grünfeld, Three Knights Variation *D91 Grünfeld, Three Knights Variation *D92 Grünfeld, 5.Bf4 *D93 Grünfeld with 5.Bf4 0-0 6.e3 *D94 Grünfeld, 5.e3 *D95 Grünfeld with 5.e3 0-0 6.Qb3 *D96 Grünfeld, Russian Variation *D97 Grünfeld, Russian Variation with 7.e4 *D98 Grünfeld, Russian, Smyslov Variation *D99 Grünfeld Defence, Smyslov, Main line

E – Indian Defenses

* 1.d4 Nf6 2.c4 e6: Indian systems with ...e6 (E00–E59) * 1.d4 Nf6 2.c4 g6 without 3...d5: Indian systems with ...g6 (except Grünfeld) (E60–E99)

E00–E59

1.d4 Nf6 2.c4 e6: Indian systems with ...e6 *E00

(including Neo-Indian Attack,

Catalan Opening The Catalan Opening is a chess opening where White plays d4 and c4 and fianchettoes the white bishop on g2. 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 ...

and others) *E01

Catalan Catalan may refer to: Catalonia From, or related to Catalonia: * Catalan language, a Romance language * Catalans, an ethnic group formed by the people from, or with origins in, Northern or southern Catalonia Places * 13178 Catalan, asteroid #1 ...

, Closed *E02 Catalan, open, 5.Qa4 *E03 Catalan, open, Alekhine Variation *E04 Catalan, Open, 5.Nf3 *E05 Catalan, Open, Classical line *E06 Catalan, Closed, 5.Nf3 *E07 Catalan, Closed, 6...Nbd7 *E08 Catalan, Closed, 7.Qc2 *E09 Catalan, Closed, Main line *E10

3.Nf3 *E11

Bogo-Indian Defence The Bogo-Indian Defense is a chess opening characterised by the moves: :1. d4 Nf6 :2. c4 e6 :3. Nf3 Bb4+ The position arising after 1.d4 Nf6 2.c4 e6 is common. The traditional move for White here is 3.Nc3, threatening to set up a big pawn c ...

*E12

*E13 Queen's Indian, 4.Nc3, Main line *E14 Queen's Indian, 4.e3 *E15 Queen's Indian, 4.g3 *E16 Queen's Indian, Capablanca Variation *E17 Queen's Indian, 5.Bg2 Be7 *E18 Queen's Indian, Old Main line, 7.Nc3 *E19 Queen's Indian, Old Main line, 9.Qxc3 *E20

Nimzo-Indian Defence The Nimzo-Indian Defence is a chess opening characterised by the moves: :1. d4 Nf6 :2. c4 e6 :3. Nc3 Bb4 Other move orders, such as 1.c4 e6 2.Nc3 Nf6 3.d4 Bb4, are also feasible. In the ''Encyclopaedia of Chess Openings'', the Nimzo-Indian ...

*E21 Nimzo-Indian, Three Knights Variation *E22 Nimzo-Indian, Spielmann Variation *E23 Nimzo-Indian, Spielmann, 4...c5, 5.dxc5 Nc6 *E24 Nimzo-Indian, Sämisch Variation *E25 Nimzo-Indian, Sämisch Variation, Keres Variation *E26 Nimzo-Indian, Sämisch Variation, 4.a3 Bxc3+ 5.bxc3 c5 6.e3 *E27 Nimzo-Indian, Sämisch Variation, 5...0-0 *E28 Nimzo-Indian, Sämisch Variation, 6.e3 *E29 Nimzo-Indian, Sämisch Variation, Main line *E30 Nimzo-Indian, Leningrad Variation, *E31 Nimzo-Indian, Leningrad Variation, Main line *E32 Nimzo-Indian, Classical Variation (4.Qc2) *E33 Nimzo-Indian, Classical Variation, 4...Nc6 *E34 Nimzo-Indian, Classical, Noa Variation (4...d5) *E35 Nimzo-Indian, Classical, Noa Variation, 5.cxd5 exd5 *E36 Nimzo-Indian, Classical, Noa Variation, 5.a3 *E37 Nimzo-Indian, Classical, Noa Variation, Main line, 7.Qc2 *E38 Nimzo-Indian, Classical, 4...c5 *E39 Nimzo-Indian, Classical, Pirc Variation *E40 Nimzo-Indian, 4.e3 *E41 Nimzo-Indian, 4.e3 c5 5.Bd3 Nc6 6.Nf3 Bxc3+ 7.bxc3 d6, Hübner Variation *E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) *E43 Nimzo-Indian, Fischer Variation *E44 Nimzo-Indian, Fischer Variation, 5.Ne2 *E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation *E46 Nimzo-Indian, 4.e3 0-0 *E47 Nimzo-Indian, 4.e3 0-0, 5.Bd3 *E48 Nimzo-Indian, 4.e3 0-0, 5.Bd3 d5 *E49 Nimzo-Indian, 4.e3, Botvinnik System *E50 Nimzo-Indian, 4.e3 0-0, 5.Nf3, without ...d5 *E51 Nimzo-Indian, 4.e3 0-0, 5.Nf3 d5 *E52 Nimzo-Indian, 4.e3, Main line with ...b6 *E53 Nimzo-Indian, 4.e3, Main line with ...c5 *E54 Nimzo-Indian, 4.e3, Gligoric System with 7...dxc4 *E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation *E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 *E57 Nimzo-Indian, 4.e3, Main line with 8...dxc4 and 9...Bxc4 cxd4 *E58 Nimzo-Indian, 4.e3, Main line with 8...Bxc3 *E59 Nimzo-Indian, 4.e3, Main line

E60–E99

1.d4 Nf6 2.c4 g6 without 3...d5: Indian systems with ...g6 (except Grünfeld) *E60

King's Indian Defence The King's Indian Defence is a common chess opening. It is defined by the following moves: :1. d4 Nf6 :2. c4 g6 Black intends to follow up with 3...Bg7 and 4...d6 (the Grünfeld Defence arises when Black plays 3...d5 instead, and is consi ...

*E61 King's Indian Defence, 3.Nc3 *E62 King's Indian, Fianchetto Variation *E63 King's Indian, Fianchetto, Panno Variation *E64 King's Indian, Fianchetto, Yugoslav System *E65 King's Indian, Yugoslav, 7.0-0 *E66 King's Indian, Fianchetto, Yugoslav Panno *E67 King's Indian, Fianchetto with ...Nd7 *E68 King's Indian, Fianchetto, Classical Variation, 8.e4 *E69 King's Indian, Fianchetto, Classical Main line *E70 King's Indian, 4.e4 *E71 King's Indian, Makogonov System (5.h3) *E72 King's Indian with e4 and g3 *E73 King's Indian, 5.Be2 *E74 King's Indian, Averbakh, 6...c5 *E75 King's Indian, Averbakh, Main line *E76 King's Indian, Four Pawns Attack *E77 King's Indian, Four Pawns Attack, 6.Be2 *E78 King's Indian, Four Pawns Attack, with Be2 and Nf3 *E79 King's Indian, Four Pawns Attack, Main line *E80 King's Indian, Sämisch Variation *E81 King's Indian, Sämisch, 5...0-0 *E82 King's Indian, Sämisch, Double Fianchetto Variation *E83 King's Indian, Sämisch, 6...Nc6 (Panno Variation) *E84 King's Indian, Sämisch, Panno Main line *E85 King's Indian, Sämisch, Orthodox Variation *E86 King's Indian, Sämisch, Orthodox, 7.Nge2 c6 *E87 King's Indian, Sämisch, Orthodox, 7.d5 *E88 King's Indian, Sämisch, Orthodox, 7.d5 c6 *E89 King's Indian, Sämisch, Orthodox Main line *E90 King's Indian, 5.Nf3 *E91 King's Indian, 6.Be2 *E92 King's Indian, Classical Variation *E93 King's Indian, Petrosian System, Main line *E94 King's Indian, Orthodox Variation *E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1 *E96 King's Indian, Orthodox, 7...Nbd7, Main line *E97 King's Indian, Orthodox, Aronin–Taimanov Variation (Yugoslav Attack / Mar del Plata Variation) *E98 King's Indian, Orthodox, Aronin–Taimanov, 9.Ne1 *E99 King's Indian, Orthodox, Aronin–Taimanov, Defence

Statistics

These statistics show a movement away from symmetrical defences to asymmetrical defences. In particular, in reply to 1.e4, the Sicilian and French defences, and to 1.d4 the Indian defences. Also, particularly amongst strong players, an increased use of the English Opening for White.

References

External links

* {{Chess +List of chess openings Openings