This is a list of chess opening

Chess opening

A chess opening is the group of initial moves of a chess game. Recognized sequences of opening moves are referred to as openings as initiated by White or defenses, as created in reply by Black. There are many dozens of different openings, and hundreds of named variants. The Oxford Companion to...

s, organised by the Encyclopaedia of Chess Openings

Encyclopaedia of Chess Openings

The Encyclopaedia of Chess Openings is a classification system for the opening moves in a game of chess. It is presented as a five volume book collection describing chess openings...

 (ECO) code. In 1966, Chess Informant

Chess Informant

Chess Informant is a publishing company from Belgrade that periodically produces a book of the same name, as well as the Encyclopaedia of Chess Openings, Encyclopaedia of Chess Endings, Opening Monographs, other print publications, and software Chess Informant (Šahovski Informator) is a...

 categorised the chess opening

Chess opening

A chess opening is the group of initial moves of a chess game. Recognized sequences of opening moves are referred to as openings as initiated by White or defenses, as created in reply by Black. There are many dozens of different openings, and hundreds of named variants. The Oxford Companion to...

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 Encyclopaedia of Chess Openings, with volumes labeled "A" through "E". This is a list of chess openings by the ECO classification.

A

• White first moves other than 1. e4, 1. d4 (A00-A39)
• 1. d4 without 1...d5 or 1...Nf6: 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
  Indian defences
  Indian defences are chess openings characterised by the moves:Transpositions are important and many of the positions can be reached by several move orders. They are all to varying degrees hypermodern defences, where Black invites White to establish an imposing presence in the centre with the plan...
  
   (A50-A79)
• 1. d4 f5: Dutch Defence
  Dutch Defence
  The Dutch Defence is a chess opening characterised by the moves:-History:Elias Stein , an Alsatian who settled in The Hague, recommended the defence as the best reply to 1.d4 in his 1789 book Nouvel essai sur le jeu des échecs, avec des réflexions militaires relatives à ce jeu.-Theory:Black's 1.....
  
   (A80-A99)

A00-A39

White first moves other than 1. e4, 1. d4:

• A00 Irregular Openings
  Irregular chess openings
  Irregular openings are chess openings with an unusual or rare first moves from White. Such openings include:*1.a3 *1.a4 *1.b4 *1.c3...
  
  
• Anderssen's Opening
  Anderssen's Opening
  Anderssen's Opening is a chess opening defined by the opening moveIt is named after unofficial World Chess Champion Adolf Anderssen, who played it three times in his 1858 match against Paul Morphy...
  
  : 1. a3

• Anderssen's Opening
  Anderssen's Opening
  Anderssen's Opening is a chess opening defined by the opening moveIt is named after unofficial World Chess Champion Adolf Anderssen, who played it three times in his 1858 match against Paul Morphy...
  
  , Polish Gambit: 1. a3 a5 2. b4
• Anderssen's Opening
  Anderssen's Opening
  Anderssen's Opening is a chess opening defined by the opening moveIt is named after unofficial World Chess Champion Adolf Anderssen, who played it three times in his 1858 match against Paul Morphy...
  
  , Creepy Crawly Formation: 1. a3 e5 2. h3 d5
• Anderssen's Opening
  Anderssen's Opening
  Anderssen's Opening is a chess opening defined by the opening moveIt is named after unofficial World Chess Champion Adolf Anderssen, who played it three times in his 1858 match against Paul Morphy...
  
  , Andersspike: 1. a3 g6 2. g4
  • Ware Opening
    Ware Opening
    The Ware Opening or Meadow Hay Opening, is an uncommon chess opening in which White opens withIt is named after U.S. chess player Preston Ware, who often played uncommon openings...
    
    : 1. a4
• Ware Opening
  Ware Opening
  The Ware Opening or Meadow Hay Opening, is an uncommon chess opening in which White opens withIt is named after U.S. chess player Preston Ware, who often played uncommon openings...
  
  , Wing Gambit: 1. a4 b5 2. axb5 Bb7
• Ware Opening
  Ware Opening
  The Ware Opening or Meadow Hay Opening, is an uncommon chess opening in which White opens withIt is named after U.S. chess player Preston Ware, who often played uncommon openings...
  
  , Ware Gambit: 1. a4 e5 2. a5 d5 3. e3 f5 4. a6
• Ware Opening
  Ware Opening
  The Ware Opening or Meadow Hay Opening, is an uncommon chess opening in which White opens withIt is named after U.S. chess player Preston Ware, who often played uncommon openings...
  
  , Crab Variation: 1. a4 e5 2. h4
  • Durkin Opening
    Durkin Opening
    The Durkin Opening, also known as Durkin's Attack, or the Sodium Attack, is a very rarely played chess opening beginning with the move:...
    
    : 1. Na3
  • Sokolsky Opening
    Sokolsky Opening
    The Sokolsky Opening is an uncommon chess opening:According to various databases, out of the twenty possible first moves from White, 1.b4 ranks ninth in popularity...
    
    : 1. b4
• Sokolsky Opening
  Sokolsky Opening
  The Sokolsky Opening is an uncommon chess opening:According to various databases, out of the twenty possible first moves from White, 1.b4 ranks ninth in popularity...
  
  , Birmingham Gambit: 1. b4 c5
• Sokolsky Opening
  Sokolsky Opening
  The Sokolsky Opening is an uncommon chess opening:According to various databases, out of the twenty possible first moves from White, 1.b4 ranks ninth in popularity...
  
  , Outflank Variation: 1. b4 c6
• Sokolsky Opening
  Sokolsky Opening
  The Sokolsky Opening is an uncommon chess opening:According to various databases, out of the twenty possible first moves from White, 1.b4 ranks ninth in popularity...
  
  , Schuhler Gambit: 1. b4 c6 2. Bb2 a5 3. b5 cxb5 4. e4
• Sokolsky Opening
  Sokolsky Opening
  The Sokolsky Opening is an uncommon chess opening:According to various databases, out of the twenty possible first moves from White, 1.b4 ranks ninth in popularity...
  
  , Myers Variation: 1. b4 d5 2. Bb2 c6 3. a4
• Sokolsky Opening
  Sokolsky Opening
  The Sokolsky Opening is an uncommon chess opening:According to various databases, out of the twenty possible first moves from White, 1.b4 ranks ninth in popularity...
  
  , Bugayev Attack: 1. b4 e5 2. a3
• Sokolsky Opening
  Sokolsky Opening
  The Sokolsky Opening is an uncommon chess opening:According to various databases, out of the twenty possible first moves from White, 1.b4 ranks ninth in popularity...
  
  , Wolferts Gambit: 1. b4 e5 2. Bb2 c5
  • Saragossa Opening
    Saragossa Opening
    The Saragossa Opening or Hempel's Opening is a chess opening defined by the opening moveThe name Saragossa Opening is derived from the Spanish city of Zaragoza...
    
    : 1. c3
  • Dunst Opening
    Dunst Opening
    The Dunst Opening is a chess opening where White opens with the move:This fairly uncommon opening may have more names than any other: it is also called the Heinrichsen Opening, Baltic Opening, van Geet's Opening, Sleipnir Opening, Kotrč's Opening, Meštrović Opening, Romanian Opening, Queen's...
    
    : 1. Nc3
  • Van 't Kruijs Opening
    Van 't Kruijs Opening
    The Van 't Kruijs Opening is a chess opening defined by the moveIt is named after the Amsterdam player Maarten van 't Kruijs who won the sixth Dutch championship in 1878. As this opening move is rarely played, it is considered an irregular opening, and thus it is classified under the A00 code in...
    
    : 1. e3
  • Mieses Opening
    Mieses Opening
    The Mieses Opening is a chess opening:It is named after the German-British grandmaster Jacques Mieses.White's 1.d3 releases his c1 bishop and makes a modest claim for the center, but since it does not stake out as large a share of the centre as 1.d4 does, it is not a popular opening move. Of the...
    
    : 1. d3
  • Barnes Opening
    Barnes Opening
    Barnes Opening or Gedult's Opening is a chess opening where White opens withIt is considered an irregular opening, so it is classified under the A00 code in the Encyclopaedia of Chess Openings....
    
    : 1. f3
  • Benko's Opening
    Benko's Opening
    Benko's Opening , is a chess opening characterized by the moveIt is named after Pal Benko, who used 1.g3 to defeat Bobby Fischer and Mikhail Tal in rounds one and three of the 1962 Candidates Tournament in Curaçao, part of the 1963 World Championship...
    
    : 1. g3
  • Grob's Attack
    Grob's Attack
    Grob's Attack is an unconventional chess opening where White immediately moves the king knight's pawn two squares ahead:-Discussion:The opening takes its name from Swiss International Master Henri Grob who analyzed it extensively and played hundreds of correspondence games with it...
    
    : 1. g4
  • Clemenz Opening
    Clemenz Opening
    The Clemenz Opening is a chess opening described in algebraic chess notation asIt is named after Hermann Clemenz , an Estonian player...
    
    : 1. h3
  • Desprez Opening
    Desprez Opening
    The Desprez Opening is a chess opening characterized by the opening moveThe opening is named after the French player Marcel Desprez. Like a number of other rare openings, 1.h4 has some alternate names such as "Kadas Opening", "Anti-Borg Opening", "Samurai Opening", and "Reagan's Attack". Gabor...
    
    : 1. h4
  • Amar Opening
    Amar Opening
    The Amar Opening, Paris Opening, Drunken Knight Opening, or Ammonia Opening is a chess opening defined by the moveThis opening is sometimes known as the Ammonia Opening, since NH3 is the chemical formula for ammonia. The Parisian amateur Charles Amar played it in the 1930s...
    
    : 1. Nh3
  • A01 Larsen's Opening
    Larsen's Opening
    Larsen's Opening is a chess opening starting with the move:It is named after the Danish Grandmaster Bent Larsen...
    
    , 1. b3 (Owen's Opening) (Greek Attack)
  • A02 Bird's Opening
    Bird's Opening
    Bird's Opening is a chess opening characterised by the move:Bird's is a standard but never popular flank opening. White's strategic ideas involve control of the e5-square without occupying it, but his first move is also non-developing and slightly weakens his kingside...
    
    , 1. f4 (Dutch Attack)
  • A03 Bird's Opening, 1...d5
  • A04 Réti Opening
    Réti Opening
    The Réti Opening is a hypermodern chess opening whose traditional or classic method begins with the moves:White plans to bring the d5-pawn under attack from the flank, or entice it to advance to d4 and undermine it later...
    
    , 1. Nf3
  • A05 Réti Opening, 2...Nf6
  • A06 Réti Opening, 2...d5
  • A07 Réti Opening, King's Indian Attack
    King's Indian Attack
    The King's Indian Attack , also known as the Barcza System , is a chess opening system for White, most notably used by Bobby Fischer. Its typical formation is shown in the diagram to the right....
    
     (Barcza System)
  • A08 Réti Opening, King's Indian Attack
    King's Indian Attack
    The King's Indian Attack , also known as the Barcza System , is a chess opening system for White, most notably used by Bobby Fischer. Its typical formation is shown in the diagram to the right....
    
    
  • A09 Réti Opening, 2...d5 3.c4
  • A10 English Opening
    English Opening
    In chess, the English Opening is the opening where White begins:A flank opening, it is the fourth most popular and, according to various databases, anywhere from one of the two most successful to the fourth most successful of White's twenty possible first moves. White begins the fight for the...
    
    : 1. c4
  • A11 English, Caro-Kann defensive system
  • A12 English, Caro-Kann defensive system
  • A13 English Opening
  • A14 English, Neo-Catalan declined
  • A15 English, 1...Nf6 (Anglo-Indian defence)
  • A16 English Opening
  • A17 English Opening, Hedgehog Defence
  • A18 English, Mikenas-Carls Variation
  • A19 English, Mikenas-Carls, Sicilian Variation
  • A20 English Opening
  • A21 English Opening
  • A22 English Opening
  • A23 English Opening, Bremen System, Keres Variation
  • A24 English Opening, Bremen System with 3...g6
  • A25 English Opening, Sicilian Reversed
  • A26 English Opening, Closed System
  • A27 English Opening, Three knights system
  • A28 English Opening, Four knights system
  • A29 English Opening, Four knights, kingside Fianchetto
  • A30 English Opening, Symmetrical Variation
  • A31 English Opening, Symmetrical, Benoni formation
  • A32 English Opening, Symmetrical
  • A33 English Opening, Symmetrical
  • A34 English Opening, Symmetrical
  • A35 English Opening, Symmetrical
  • A36 English Opening, Symmetrical
  • A37 English Opening, Symmetrical
  • A38 English Opening, Symmetrical
  • A39 English Opening, Symmetrical, Main line with d4

A40-A44

1. d4 without 1...d5 or 1...Nf6: Atypical replies to 1. d4 (A40-A44)

• A40 Queen's Pawn Game
  Queen's Pawn Game
  In the most general sense the term Queen's Pawn Game can refer to any chess opening which starts with the move:It is the second most popular opening move. The name is now usually used to describe openings beginning with the moves 1.d4 d5 where White does not follow through with an early pawn...
  
   (including English Defence
  English Defence
  The English Defence is a chess opening characterised by the moves 1.d4 e6 2.c4 b6. White often gains a broad pawn centre with 3.e4, which Black puts pressure on with moves like ...Bb7, ...Bb4, and sometimes even ...Qh4 and/or ...f5. It was developed by the Leicester player P.N...
  
  , Englund Gambit
  Englund Gambit
  The Englund Gambit is a rarely played chess opening that starts with the moves:Black's idea is to avoid the traditional closed queen's pawn games and create an open game with tactical chances, but at the cost of a pawn. The gambit is considered weak; Boris Avrukh writes that 1...e5 "seems to me...
  
  , Queen's Knight Defence, Polish Defence and Keres Defence)
• A41 Queen's Pawn Game, Wade Defence
• A42 Modern Defence, Averbakh System also Wade Defence
• A43 Old Benoni Defence
• A44 Old Benoni Defence

A45-A49

1. d4 Nf6 without 2.c4: Atypical replies to 1...Nf6 (A45-A49)

• A45 Queen's Pawn Game
• A46 Queen's Pawn Game
  Queen's Pawn Game
  In the most general sense the term Queen's Pawn Game can refer to any chess opening which starts with the move:It is the second most popular opening move. The name is now usually used to describe openings beginning with the moves 1.d4 d5 where White does not follow through with an early pawn...
  
  
• A47 Queen's Indian Defence
• A48 King's Indian, East Indian Defence
  East Indian Defence
  In chess, the East Indian Defence is an opening characterised by the move orderIf White plays an early c4, the opening will transpose into a King's Indian. It is also possible for White to support an early e4 advance, transposing into the Pirc Defence...
  
  
• A49 King's Indian, Fianchetto without c4

A50-A79

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

Indian defences

Indian defences are chess openings characterised by the moves:Transpositions are important and many of the positions can be reached by several move orders. They are all to varying degrees hypermodern defences, where Black invites White to establish an imposing presence in the centre with the plan...

 (A50-A79)

• A50 Queen's Pawn Game, Black Knights' Tango
  Black Knights' Tango
  This ambitious move is playable but rarely seen. Black normally responds with 3...Ne5. Then after 4.e4 , Black struck back in the center with 4...Ng6 5.f4 e5 in the seminal game Sämisch-Torre, Moscow 1925. However, Orlov considers both Torre's fourth and fifth moves inferior...
  
  
• A51 Budapest Gambit declined
• A52 Budapest Gambit
• A53 Old Indian Defence (Chigorin Indian Defence)
• A54 Old Indian, Ukrainian Variation
• A55 Old Indian, Main line
• A56 Benoni Defence
• A57 Benko Gambit
  Benko Gambit
  The Benko Gambit is a chess opening characterised by the move 3...b5 in the Benoni Defense arising after:- Origin and predecessors :The idea of sacrificing a pawn with ...b5 and ...a6 is quite old. Karel Opočenský applied the idea against, among others, Gideon Ståhlberg at Poděbrady 1936, Paul...
  
  
• 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.O-O
• A73 Benoni, Classical, 9.O-O
• 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

Dutch Defence

The Dutch Defence is a chess opening characterised by the moves:-History:Elias Stein , an Alsatian who settled in The Hague, recommended the defence as the best reply to 1.d4 in his 1789 book Nouvel essai sur le jeu des échecs, avec des réflexions militaires relatives à ce jeu.-Theory:Black's 1.....

 (A80-A99)

• A80 Dutch Defence
  Dutch Defence
  The Dutch Defence is a chess opening characterised by the moves:-History:Elias Stein , an Alsatian who settled in The Hague, recommended the defence as the best reply to 1.d4 in his 1789 book Nouvel essai sur le jeu des échecs, avec des réflexions militaires relatives à ce jeu.-Theory:Black's 1.....
  
  
• A81 Dutch Defence
• A82 Dutch, Staunton Gambit, also includes Balogh Defence
• A83 Dutch, Staunton Gambit, Staunton's line
• A84 Dutch defence
• A85 Dutch with 2.c4 & 3.Nc3
• A86 Dutch with 2.c4 & 3.g3
• A87 Dutch, Leningrad, Main Variation
• A88 Dutch, Leningrad, Main Variation with 7...c6
• A89 Dutch, Leningrad, Main Variation with Nc6
• A90 Dutch Defence
• A91 Dutch Defence
• A92 Dutch Defence
• A93 Dutch, Stonewall, Botvinnik Variation
• A94 Dutch, Stonewall with Ba3
• A95 Dutch, Stonewall with Nc3
• A96 Dutch, Classical Variation
• A97 Dutch, Ilyin-Genevsky Variation
• A98 Dutch, Ilyin-Genevsky Variation with Qc2
• A99 Dutch, Ilyin-Genevsky Variation with b3

B00-B19

1. e4 without 1...c5, 1...e6 or 1...e5 (B00-B19)

• B00 King's pawn Opening without 1... e5, 1... d5, 1... Nf6, 1... g6, 1... d6, 1... c6, 1... c5.
  • Nimzowitsch Defence
    Nimzowitsch Defence
    The Nimzowitsch Defence is a somewhat unusual chess opening, in which Black moves 1... Nc6 in reply to White's 1.e4. It is an example of a hypermodern opening where Black invites White to occupy the centre of the board at an early stage with pawns...
    
     1... Nc6
  • St. George Defence 1... a6
  • Owen's Defence (Greek Defence) 1... b6
  • Hippopotamus Defence
    Hippopotamus Defence
    The Hippopotamus Defence is a name for various irregular chess opening systems in which Black moves a number of his pawns to the third rank, often developing his pieces to the second rank, and does not move any of his pawns to the fourth rank in the opening...
    
    
  • and others
• B01 Scandinavian Defence (Center Counter Defence)
• B02 Alekhine's Defence
  Alekhine's Defence
  Alekhine's Defence is a hypermodern chess opening that begins with the moves:Black tempts White's pawns forward to form a broad pawn centre, with plans to undermine and attack the White structure later in the spirit of hypermodern defence. White's imposing mass of pawns in the centre often includes...
  
  
• 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
  Monkey's Bum
  The Monkey's Bum is a variation of the Modern Defense, a chess opening. Although it may also be loosely defined as any approach against the Modern Defense involving an early Bc4 and Qf3, threatening "scholar's mate", it is strictly defined by the sequence of moves:The Monkey's Bum Deferred is a...
  
  
• B07 Pirc Defence
  Pirc Defence
  The Pirc Defence |grandmasters]]), sometimes known as the Ufimtsev Defence or Yugoslav Defence, is a chess opening characterised by Black responding to 1.e4 with 1...d6 and 2...Nf6, followed by ...g6 and ...Bg7, while allowing White to establish an impressive-looking centre with pawns on d4 and e4...
  
  
• B08 Pirc, Classical (Two Knights) System
• B09 Pirc, Austrian attack
• B10 Caro-Kann Defence
  Caro-Kann Defence
  The Caro-Kann Defence is a chess opening —a common defense against the King's Pawn Opening characterised by the moves:The usual continuation isfollowed by 3.Nc3 , 3.Nd2 , 3.exd5 , or 3.e5 . The classical variation has gained much popularity...
  
  
• 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
• B18 Caro-Kann, Classical Variation
• B19 Caro-Kann, Classical, 7...Nd7

B20-B99

1. e4 c5: Sicilian Defence

Sicilian Defence

The Sicilian Defence is a chess opening that begins with the moves:The Sicilian is the most popular and best-scoring response to White's first move 1.e4...

 (B20-B99)

• B20 Sicilian Defence
  Sicilian Defence
  The Sicilian Defence is a chess opening that begins with the moves:The Sicilian is the most popular and best-scoring response to White's first move 1.e4...
  
  
• B21 Sicilian, Grand Prix Attack and Smith-Morra Gambit
  Smith-Morra Gambit
  In chess, the Smith–Morra Gambit is an opening gambit against the Sicilian Defence distinguished by the moves:The Smith–Morra is not common in grandmaster games, but at club level chess it can be an excellent weapon.-History:...
  
  , including the Siberian Trap
  Siberian Trap
  The Siberian Trap is a chess opening trap. After a series of natural moves in the Smith-Morra Gambit of the Sicilian Defence, White can lose a queen...
  
  
• B22 Sicilian Defence, Alapin Variation (2.c3)
• B23 Sicilian, Closed
• B24 Sicilian, Closed
• B25 Sicilian, Closed
• B26 Sicilian, Closed, 6.Be3
• B27 Sicilian Defence
• B28 Sicilian, O'Kelly Variation
• B29 Sicilian, Nimzovich-Rubinstein Variation
• B30 Sicilian Defence
• B31 Sicilian, Nimzovich-Rossolimo Attack (with ...g6, without ...d6)
• B32 Sicilian Defence
• B33 Sicilian, Sveshnikov (Lasker-Pelikan) Variation
• B34 Sicilian Defence, Accelerated Fianchetto, Exchange Variation
• B35 Sicilian Defence, Accelerated Fianchetto, Modern Variation with Bc4
• B36 Sicilian Defence, Accelerated Fianchetto, Maroczy bind
  Maróczy Bind
  The Maróczy Bind is a pawn formation in chess, named after the Hungarian grandmaster Géza Maróczy and primarily, but not exclusively, played against the Sicilian Defence. It is characterized by white pawns on c4 and e4, with White's d-pawn having been exchanged for Black's c-pawn...
  
  
• B37 Sicilian Defence, Accelerated Fianchetto, Maroczy bind, 5...Bg7
• B38 Sicilian Defence, Accelerated Fianchetto, Maroczy bind, 6.Be3
• B39 Sicilian Defence, Accelerated Fianchetto, Breyer Variation
• B40 Sicilian Defence
• B41 Sicilian, Kan Variation
• B42 Sicilian, Kan, 5.Bd3
• B43 Sicilian, Kan, 5.Nc3
• B44 Sicilian Defence
• B45 Sicilian, Taimanov Variation
• B46 Sicilian, Taimanov Variation
• B47 Sicilian, Taimanov (Bastrikov) variation
• B48 Sicilian, Taimanov Variation
• B49 Sicilian, Taimanov Variation
• B50
  Sicilian Defence
  The Sicilian Defence is a chess opening that begins with the moves:The Sicilian is the most popular and best-scoring response to White's first move 1.e4...
  
   Sicilian
• 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
  Magnus Smith Trap
  The Magnus Smith Trap is a chess opening trap in the Sicilian Defence, named after three-time Canadian chess champion Magnus Smith ....
  
  
• 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
  Sicilian Defence, Dragon Variation
  In chess, the Dragon Variation is one of the main lines of the Sicilian Defence and begins with the moves:The name "Dragon" was first coined by Russian chess master and amateur astronomer Fyodor Dus-Chotimirsky who noted the resemblance of Black's kingside pawn structure to the constellation...
  
  
• B71 Sicilian, Dragon, Levenfish Variation
• B72 Sicilian, Dragon, 6.Be3
• B73 Sicilian, Dragon, Classical, 8.O-O
• B74 Sicilian, Dragon, Classical, 9.Nb3
• B75 Sicilian, Dragon, Yugoslav Attack
• B76 Sicilian, Dragon, Yugoslav attack, 7...O-O
• B77 Sicilian, Dragon, Yugoslav attack, 9.Bc4
  Sicilian, Dragon, Yugoslav attack, 9.Bc4
  In chess, B77 is the ECO code for the Sicilian, Dragon, Yugoslav Attack, 9.Bc4 chess opening. Also known as the Rauzer System or the St George Attack, the Yugoslav Attack begins with the following moves:...
  
  
• B78 Sicilian, Dragon, Yugoslav attack, 10.O-O-O
• B79 Sicilian, Dragon, Yugoslav attack, 12.h4
• B80 Sicilian Defence, Scheveningen Variation
  Sicilian Defence, Scheveningen Variation
  In the opening of a game of chess, the Scheveningen Variation of the Sicilian Defence is one of Black's most ambitious lines in the Open Sicilian...
  
  
• 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
  Poisoned Pawn Variation
  The Poisoned Pawn Variation is any of several chess opening variations where a pawn is said to be "poisoned" because its capture can result in positional problems or material loss for the captor. The best known of these, called the Poisoned Pawn Variation, is a line of the Sicilian Defense, Najdorf...
  
  
• B98 Sicilian, Najdorf, 7...Be7
• B99 Sicilian, Najdorf, 7...Be7 Main line

C00-C19

1. e4 e6: French Defence

French Defence

The French Defence is a chess opening. It is characterised by the moves:The French has a reputation for solidity and resilience, though it can result in a somewhat cramped game for Black in the early stages...

 (C00-C19)

• C00 French Defence
  French Defence
  The French Defence is a chess opening. It is characterised by the moves:The French has a reputation for solidity and resilience, though it can result in a somewhat cramped game for Black in the early stages...
  
  
• C01 French, Exchange Variation, Kingston Defence
  Kingston Defence
  The Kingston Defence or Franco-Dutch Defence is an uncommon chess opening. It is characterised by the opening moves:giving the position at right. . Its ECO classification is C01.The first record of the defence being played is Schiffers-Chigorin, 1880...
  
  
• 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-C99)

• C20 King's Pawn Game
  King's Pawn Game
  The King's Pawn Game is any chess opening starting with the move:White opens with the most popular of the twenty possible opening moves. Though effective in winning for White , it is not as successful as the four next most common openings for White: 1.d4 , 1.Nf3 , 1.c4 , and 1.g3...
  
    (includes Alapin's Opening
  Alapin's Opening
  Alapin's Opening is an unusual chess opening that starts with the moves:Although this opening is rarely used, Ljubojević played against it at Groningen in 1970.Alapin's Opening is offbeat, but perfectly playable for White....
  
  , Lopez Opening
  Lopez Opening
  The Lopez Opening or MacLeod Attack is a chess opening characterized by the movesWhite's second move prepares to push a pawn to d4, establishing a strong center. Play can potentially transpose to other openings, most likely the Ponziani Opening or the Göring Gambit in the Scotch Game...
  
  , Napoleon Opening
  Napoleon Opening
  The Napoleon Opening is an irregular chess opening starting withIt is a weak opening because it develops the queen too early and subjects it to attack, and deprives the knight of its best square....
  
  , Portuguese Opening
  Portuguese Opening
  The Portuguese Opening is a chess opening that begins with the movesThe Portuguese is an uncommon opening.In contrast to the Ruy Lopez , by delaying Nf3 White leaves the f-pawn free to move and retains the possibility of playing f4...
  
   and Parham Attack
  Parham Attack
  The Parham Attack is an irregular chess opening beginning with the moves:The opening is named after American chess master Bernard Parham, the first master-level player known to have advocated it...
  
  )
• C21 Center Game
  Center Game
  The Center Game is a chess opening that begins with the moves:The game usually continues 3.Qxd4 Nc6, developing with a gain of tempo due to the attack on the white queen....
  
   (includes Danish Gambit
  Danish Gambit
  The Danish Gambit, known as the in German, and the in Dutch, is a chess opening that begins with the moves:...
  
  )
• C22 Center Game
• C23 Bishop's Opening
  Bishop's Opening
  The Bishop's Opening is a chess opening that begins with the moves:White attacks Black's f7-square and prevents Black from advancing his d-pawn to d5....
  
  
• C24 Bishop's Opening, Berlin Defence
• C25 Vienna Game
  Vienna Game
  The Vienna Game is a chess opening that begins with the moves:White's second move is less common than 2.Nf3, and is also of more recent vintage; a book reviewer wrote in the New York Times in 1888 that "since Morphy only one new opening has been introduced, the 'Vienna.The original idea behind...
  
  
• C26 Vienna Game, Falkbeer Variation
• C27 Vienna Game, Frankenstein-Dracula Variation
  Frankenstein-Dracula Variation
  The Frankenstein–Dracula Variation is a chess opening, usually considered a branch of the Vienna Game, but can also be reached from the Bishop's Opening...
  
  
• C28 Vienna Game
• C29 Vienna Gambit, Kaufmann Variation including Würzburger Trap
  Würzburger Trap
  The Würzburger Trap is a chess opening trap in the Vienna Gambit.It was named around 1930 for German banker Max Würzburger.The trap begins with the movesThe Würzburger Trap is a chess opening trap in the Vienna Gambit....
  
  
• C30 King's Gambit
  King's Gambit
  The King's Gambit is a chess opening that begins with the moves:White offers a pawn to divert the Black e-pawn so as to build a strong centre with d2–d4...
  
  
• 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
• C38 King's Gambit Accepted
• C39 KGA, Allgaier & Kieseritsky Gambits including Rice Gambit
  Rice Gambit
  The Rice Gambit is a chess opening that arises from the King's Gambit Accepted. An offshoot of the Kieseritzky Gambit, it is characterized by the moves 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6 8. O-O...
  
  
• C40 King's Knight Opening
  King's Knight Opening
  The King's Knight Opening is a chess opening consisting of the moves:The opening is likely to continue into one of a number of other named openings, depending mainly on Black's second move.-Popular continuations:...
  
   (includes Gunderam Defence, Greco Defence
  Greco Defence
  The Greco Defence , named after Gioachino Greco , is a chess opening beginning with the moves:The opening is categorized as ECO code C40.-Discussion:...
  
  , Damiano Defence
  Damiano Defence
  The Damiano Defence is a chess opening characterized by the opening moves#e4 e5#Nf3 f6?The ECO code for the Damiano Defence is C40 .-Details:...
  
  , Elephant Gambit
  Elephant Gambit
  The Elephant Gambit is a rarely played chess opening beginning with the moves:...
  
  , and Latvian Gambit
  Latvian Gambit
  The Latvian Gambit is an aggressive but dubious chess opening, which often leads to wild and tricky positions. This opening is uncommon at the top level of over-the-board play, but some correspondence chess players are devoted to it...
  
  .)
• C41 Philidor Defence
  Philidor Defence
  The Philidor Defence is a chess opening characterised by the moves:It is named after the famous 18th-century player François-André Danican Philidor, who advocated it as an alternative to the common 2...Nc6...
  
  
• C42 Petrov's Defence
  Petrov's Defence
  Petrov's Defence is a chess opening characterised by the following moves:Though this symmetrical response has a long history, it was first popularised by Alexander Petrov, a Russian chess player of the mid-19th century...
  
  , including Marshall Trap
  Marshall Trap
  The Marshall Trap is a chess opening trap in Petrov's Defence named after Frank Marshall.The trap begins with the movesThe Marshall Trap is a chess opening trap in Petrov's Defence named after Frank Marshall.The trap begins with the moves...
  
  
• C43 Petrov's Defence, Modern (Steinitz) Attack
• C44 King's Pawn Game (includes Ponziani Opening
  Ponziani Opening
  The Ponziani Opening is a chess opening that begins with the moves:The opening is now considered inferior to 3.Bb5, the Ruy Lopez, and 3.Bc4, the Italian Game, and is accordingly rarely seen today at any level of play. Black's main responses are 3...Nf6, leading to quiet play, and 3...d5, leading...
  
  , Inverted Hungarian Opening
  Inverted Hungarian Opening
  The Inverted Hungarian Opening or Tayler Opening is an uncommon chess opening that starts with the movesThe Inverted Hungarian is even more rare than the already very uncommon Hungarian Defense, although it is perfectly playable for White....
  
  , Irish Gambit
  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. White's pawns occupy the center, but the sacrifice of a knight for a pawn is a very high price to pay. The gambit is accordingly considered unsound, and...
  
  , Konstantinopolsky Opening
  Konstantinopolsky Opening
  The Konstantinopolsky Opening is a rarely played chess opening that begins with the moves 1.e4 e5 2.Nf3 Nc6 3.g3.It was introduced in the game Konstantinopolsky–Ragozin, Moscow 1956....
  
   and some Scotch Game
  Scotch Game
  The Scotch Game is a chess opening that begins with the movesWhite aims to dominate the centre by exchanging his d-pawn for Black's e-pawn. Black usually plays 3...exd4, as he has no good way to maintain his pawn on e5...
  
  )
• C45 Scotch Game
  Scotch Game
  The Scotch Game is a chess opening that begins with the movesWhite aims to dominate the centre by exchanging his d-pawn for Black's e-pawn. Black usually plays 3...exd4, as he has no good way to maintain his pawn on e5...
  
  
• C46 Three Knights Game including Müller-Schulze Gambit
  Müller-Schulze Gambit
  The Halloween Gambit, also known as the Müller-Schulze Gambit or Leipzig Gambit, is an aggressive gambit in chess, in which White sacrifices a knight for just one pawn. It is a branch of the normally staid Four Knights Game. The theoretician Oskar Cordel reported in 1888 that Leipzig club players...
  
   or Halloween Attack
• C47 Four Knights Game
  Four Knights Game
  The Four Knights Game is a chess opening that begins with the moves:The opening is fairly popular with beginners who strictly adhere to the opening principle: "Develop knights before bishops." It was one of the workhorses in the family of the Open Game, at even the highest levels, until World War...
  
  
• C48 Four Knights Game, Spanish Variation
• C49 Four Knights Game, Double Ruy Lopez
• C50 King's Pawn Game
  King's Pawn Game
  The King's Pawn Game is any chess opening starting with the move:White opens with the most popular of the twenty possible opening moves. Though effective in winning for White , it is not as successful as the four next most common openings for White: 1.d4 , 1.Nf3 , 1.c4 , and 1.g3...
  
   (includes Blackburne Shilling Gambit
  Blackburne Shilling Gambit
  The Blackburne Shilling Gambit is the name facetiously given to a dubious chess opening, derived from an offshoot of the Italian Game, that begins 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4?!...
  
  , Hungarian Defence, Italian Gambit
  Italian Gambit
  The Italian Gambit is a chess opening characterized by the movesAfter 4...Bxd4 5.Nxd4 Nxd4, George Koltanowski favoured 6.0-0, which transposes to the related gambit line 4.0-0 Nf6 5.d4 following 6...Nf6, when 7.f4 and 7.Bg5 are the main possibilities for White. However, 6...d6!? is an independent...
  
  , Légal Trap
  Légal Trap
  The Legal Trap, Blackburne Trap, also known as Legal Pseudo-Sacrifice and Legal Mate is a chess opening trap, characterized by a queen sacrifice followed by checkmate with minor pieces if Black accepts the sacrifice. The trap is named after Sire de Légal , a French player...
  
  , Rousseau Gambit
  Rousseau Gambit
  The Rousseau Gambit is a chess opening characterised by the moves:Key themes for White are to attack Black's kingside and to avoid attempts by Black to simplify the position...
  
   and Giuoco Pianissimo
  Giuoco Piano
  The Giuoco Piano is a chess opening beginning with the moves:Common alternatives to 3...Bc5 include 3...Nf6 , 3...Be7 , or 3...d6 .-History:...
  
  )
• C51 Evans Gambit
  Evans Gambit
  The Evans Gambit is a chess opening characterised by the moves:The gambit is named after the Welsh sea Captain William Davies Evans, the first player known to have employed it. The first game with the opening is considered to be Evans - McDonnell, London 1827, although in that game a slightly...
  
  
• C52 Evans Gambit with 4...Bxb4 5.c3 Ba5
• C53 Giuoco Piano
  Giuoco Piano
  The Giuoco Piano is a chess opening beginning with the moves:Common alternatives to 3...Bc5 include 3...Nf6 , 3...Be7 , or 3...d6 .-History:...
  
  
• C54 Giuoco Piano
• C55 Two Knights Defence
• C56 Two Knights Defence
• C57 Two Knights Defence, including the Fegatello Attack
  Fried Liver Attack
  The Fried Liver Attack, also called the Fegatello Attack , is a chess opening. This colourfully named opening is a variation of the Two Knights Defense in which White sacrifices a knight for a superficially impressive attack on Black's king...
  
  
• C58 Two Knights Defence
• C59 Two Knights Defence
• C60 Ruy Lopez
  Ruy Lopez
  The Ruy Lopez, also called the Spanish Opening or Spanish Game, is a chess opening characterised by the moves:-History:The opening is named after the 16th century Spanish priest Ruy López de Segura, who made a systematic study of this and other openings in the 150-page book on chess Libro del...
  
   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
  Mortimer Trap
  The Mortimer Trap is a chess opening trap in the Ruy Lopez named after James Mortimer. The Mortimer Trap is a true trap in the sense that Black deliberately plays an inferior move hoping to trick White into making a mistake....
  
  
• C66 Ruy Lopez, Berlin Defence, 4.O-O, d6
• C67 Ruy Lopez, Berlin Defence, Open variation
• C68 Ruy Lopez, Exchange Variation
  Ruy Lopez, Exchange Variation
  The Ruy Lopez, Exchange Variation is a variation of the Ruy Lopez chess opening that begins with the moves:-ECO codes:There are two ECO classifications for the Exchange Variation. ECO code C68 covers 4...dxc6, with White's response of 5.d4 or 5.Nc3 to either capture...
  
  
• C69 Ruy Lopez, Exchange Variation, 5.O-O
• C70 Ruy Lopez
• C71 Ruy Lopez, Modern Steinitz Defence including Noah's Ark Trap
  Noah's Ark Trap
  The Noah's Ark Trap is a chess opening trap in the Ruy Lopez.The name is actually used to describe a family of traps in the Ruy Lopez in which a white bishop is trapped on the b3-square by black pawns.The origin of the name is uncertain....
  
  
• 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.O-O
• 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
  Yuri Averbakh
  Yuri Lvovich Averbakh is a Soviet and Russian chess player and author. He is currently the oldest living chess grandmaster.-Life and career:...
  
   Variation
• C88 Ruy Lopez, Closed
• C89 Ruy Lopez, Marshall Counterattack
• C90 Ruy Lopez, Closed (with ...d6)
• C91 Ruy Lopez, Closed, 9.d4
• C92 Ruy Lopez, Closed, 9.h3
• C93 Ruy Lopez, Closed, Smyslov Defence
• C94 Ruy Lopez, Closed, Breyer Defence
• C95 Ruy Lopez, Closed, Breyer, 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

• 1. d4 d5: Closed Game
  Closed Game
  A Closed Game, also called a Double Queen Pawn Opening, is a chess opening that begins with the moves:The move 1.d4 offers the same benefits to development and center control as does 1.e4, but unlike with the King Pawn openings where the e4 pawn is undefended after the first move, the d4 pawn is...
  
   (D00-D69)
• 1. d4 Nf6 2.c4 g6 with 3...d5: Grünfeld Defence
  Grünfeld Defence
  The Grünfeld Defence is a chess opening characterised by the moves:-History:The first instance of this opening is in an 1855 game by Moheschunder Bannerjee, an Indian player who had transitioned from Indian chess rules, playing black against John Cochrane in Calcutta, in May 1855: 1. d4 Nf6 2. c4...
  
   (D70-D99)

D00-D69

1. d4 d5: Closed Game

Closed Game

A Closed Game, also called a Double Queen Pawn Opening, is a chess opening that begins with the moves:The move 1.d4 offers the same benefits to development and center control as does 1.e4, but unlike with the King Pawn openings where the e4 pawn is undefended after the first move, the d4 pawn is...

 (D00-D69)

• D00 Queen's Pawn Game
  Queen's Pawn Game
  In the most general sense the term Queen's Pawn Game can refer to any chess opening which starts with the move:It is the second most popular opening move. The name is now usually used to describe openings beginning with the moves 1.d4 d5 where White does not follow through with an early pawn...
  
   (including Blackmar-Diemer Gambit
  Blackmar-Diemer Gambit
  The Blackmar–Diemer Gambit is a chess opening characterized by the moves:- History :The Blackmar–Diemer Gambit arose as a development of the earlier Blackmar Gambit, named after Armand Blackmar, a relatively little-known New Orleans player of the late 19th century who popularized its...
  
  , Halosar Trap
  Halosar Trap
  The Halosar Trap is a chess opening trap in the Blackmar-Diemer Gambit.The trap begins with the movesThe Halosar Trap is a chess opening trap in the Blackmar-Diemer Gambit....
  
   and others)
• D01 Richter-Veresov Attack
  Richter-Veresov Attack
  The Richter–Veresov Attack is a chess opening that begins with the moves:The opening was named after the German International Master Kurt Richter and later the Soviet master Gavriil Veresov, who played it frequently for over a quarter of a century.Along with the Trompowsky Attack, Colle System,...
  
  
• D02 Queen's Pawn Game, 2. Nf3
• D03 Torre Attack
  Torre Attack
  The Torre Attack is a chess opening characterized by the moves:The opening is named after the Mexican grandmaster Carlos Torre Repetto. The variation was also employed by Savielly Tartakower, and the young Tigran Petrosian on occasion...
  
  , Tartakower Variation
• D04 Queen's Pawn Game
• D05 Queen's Pawn Game, Zukertort Variation (including Colle system
  Colle System
  The Colle System is a chess opening strategy for White introduced by Belgian Edgard Colle in the 1920s. Also known as the Colle–Koltanowski system, played frequently and further developed by George Koltanowski, this variation of the Queen's Pawn Game is characterised by a systematic if modest...
  
  )
• D06 Queen's Gambit
  Queen's Gambit
  The Queen's Gambit is a chess opening that starts with the moves:The Queen's Gambit is one of the oldest known chess openings. It was mentioned in the Göttingen manuscript of 1490 and was later analysed by masters such as Gioachino Greco in the seventeenth century...
  
   (including the Baltic Defence, Marshall Defence and Symmetrical Defence)
• D07 QGD; Chigorin Defence
• D08 QGD; Albin Countergambit
  Albin Countergambit
  The Albin Countergambit is a chess opening that begins with the moves:and the usual continuation is:The opening is an uncommon defense to the Queen's Gambit. In exchange for the gambit pawn, Black has a central wedge at d4 and gets some chances for an attack...
  
   and Lasker Trap
  Lasker Trap
  The Lasker Trap is a chess opening trap in the Albin Countergambit, named after Emanuel Lasker, although it was first noted by Serafino Dubois . It is unusual in that it features an underpromotion as early as the seventh move....
  
  
• D09 QGD; Albin Countergambit, 5.g3
• D10 QGD; Slav Defence
• 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
  Queen's Gambit Accepted
  The Queen's Gambit Accepted is a chess opening characterised by the moves:The Queen's Gambit is not considered a true gambit, in contradistinction to the King's Gambit, because the pawn is either regained, or can only be held unprofitably by Black...
  
  
• 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
  Queen's Gambit Declined
  The Queen's Gambit Declined is a chess opening in which Black declines a pawn offered by White in the Queen's Gambit:This is known as the Orthodox Line of the Queen's Gambit Declined...
  
  : 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
• 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 and Elephant Trap
  Elephant Trap
  In chess, the Elephant Trap is a faulty attempt by White to win a pawn in a popular variation of the Queen's Gambit Declined. This simple trap has snared thousands of players, generally amateurs....
  
  )
• 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 (Makogonov-Bondarevsky) System
• D59 QGD; 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
  Rubinstein Trap
  The Rubinstein Trap is a chess opening trap in the Queen's Gambit Declined, Orthodox Defense.Black loses a pawn after Nxd5 due to the threat of his queen being trapped on the back rank by Bc7. The Rubinstein Trap is a chess opening trap in the Queen's Gambit Declined, Orthodox Defense.Black loses a...
  
  
• 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: Grünfeld Defence

Grünfeld Defence

The Grünfeld Defence is a chess opening characterised by the moves:-History:The first instance of this opening is in an 1855 game by Moheschunder Bannerjee, an Indian player who had transitioned from Indian chess rules, playing black against John Cochrane in Calcutta, in May 1855: 1. d4 Nf6 2. c4...

 (D70-D99)

• 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.O-O
• D75 Neo-Grünfeld, 6.cxd5 Nxd5, 7.O-O c5, 8.Nc3
• D76 Neo-Grünfeld, 6.cxd5 Nxd5, 7.O-O Nb6
• D77 Neo-Grünfeld, 6.O-O
• D78 Neo-Grünfeld, 6.O-O c6
• D79 Neo-Grünfeld, 6.O-O, Main line
• D80 Grünfeld Defence
  Grünfeld Defence
  The Grünfeld Defence is a chess opening characterised by the moves:-History:The first instance of this opening is in an 1855 game by Moheschunder Bannerjee, an Indian player who had transitioned from Indian chess rules, playing black against John Cochrane in Calcutta, in May 1855: 1. d4 Nf6 2. c4...
  
  
• D81 Grünfeld; Russian Variation
• D82 Grünfeld 4.Bf4
• D83 Grünfeld Gambit
• D84 Grünfeld Gambit accepted
• D85 Grünfeld, Nadanian Variation
  Grünfeld Defence, Nadanian Variation
  The Nadanian Variation of the Grünfeld Defence is a chess opening characterised by the moves:-History:The variation is named after the Armenian International Master Ashot Nadanian, who first employed it in 1996...
  
  
• 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 O-O 6.e3
• D94 Grünfeld, 5.e3
• D95 Grünfeld with 5.e3 O-O 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

• 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-E59)

• E00 Queen's Pawn Game
  Queen's Pawn Game
  In the most general sense the term Queen's Pawn Game can refer to any chess opening which starts with the move:It is the second most popular opening move. The name is now usually used to describe openings beginning with the moves 1.d4 d5 where White does not follow through with an early pawn...
  
   (including Neo-Indian Attack
  Neo-Indian Attack
  The Neo-Indian Attack is a chess opening defined by the opening moves1.d4 Nf6 2.c4 e6 3.Bg5.This opening is also known as the Seirawan attack, after top 1980s player Yasser Seirawan....
  
  , Trompowski Attack
  Trompowski Attack
  The Trompowsky Attack is a chess opening that begins with the moves:With his second move, White intends to exchange his bishop for Black's knight, inflicting doubled pawns upon Black in the process. This is not a lethal threat; Black can choose to fall in with White's plan.The Trompowsky is a...
  
  , Catalan Opening
  Catalan Opening
  The Catalan is a chess opening which can be considered to be White adopting a mixture of the Queen's Gambit and Réti Opening: 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 d5 4.Bg2, though the opening can arise from a large number...
  
   and others)
• E01 Catalan
  Catalan Opening
  The Catalan is a chess opening which can be considered to be White adopting a mixture of the Queen's Gambit and Réti Opening: 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 d5 4.Bg2, though the opening can arise from a large number...
  
  , 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 Queen's Pawn Game 3.Nf3
• E11 Bogo-Indian Defence
  Bogo-Indian Defence
  The Bogo-Indian Defence is a chess opening characterised by the moves:-Variations:White has three viable moves to meet the check. 4.Nc3 is a transposition to the Kasparov Variation of the Nimzo-Indian, therefore the main independent variations are 4.Bd2 and 4.Nbd2.-4...
  
  
• E12 Queen's Indian Defence
• 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
  Nimzo-Indian Defence
  The Nimzo-Indian Defence is a chess opening characterised by the moves:This hypermodern opening was developed by Grandmaster Aron Nimzowitsch who introduced it to master-level chess in the early 20th century. Unlike most Indian openings the Nimzo-Indian does not involve an immediate fianchetto,...
  
  
• E21 Nimzo-Indian, Three knights variation
• E22 Nimzo-Indian, Spielmann Variation
• E23 Nimzo-Indian, Spielmann, 4...c5, 5.dxc5 Nc6
• E24 Nimzo-Indian, Saemisch Variation
• E25 Nimzo-Indian, Saemisch Variation, Keres Variation
• E26 Nimzo-Indian, Saemisch Variation, 4.a3 Bxc3+ 5.bxc3 c5 6.e3
• E27 Nimzo-Indian, Saemisch Variation, 5...0-0
• E28 Nimzo-Indian, Saemisch Variation, 6.e3
• E29 Nimzo-Indian, Saemisch Variation, Main line
• E30 Nimzo-Indian, Leningrad Variation,
• E31 Nimzo-Indian, Leningrad Variation, main line
• E32 Nimzo-Indian, Classical Variation
• E33 Nimzo-Indian, Classical Variation, 4...Nc6
• E34 Nimzo-Indian, Classical, Noa Variation
• 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
• 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 O-O
• E47 Nimzo-Indian, 4.e3 O-O, 5.Bd3
• E48 Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5
• E49 Nimzo-Indian, 4.e3, Botvinnik System
• E50 Nimzo-Indian, 4.e3 O-O, 5.Nf3, without ...d5
• E51 Nimzo-Indian, 4.e3 O-O, 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-E99)

• E60 King's Indian Defence
  King's Indian Defence
  The King's Indian Defence is a common chess opening. It arises after the moves:Black intends to follow up with 3...Bg7 and 4...d6.The Grünfeld Defence arises when Black plays 3...d5 instead, and is considered a separate opening...
  
  
• 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.O-O
• 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 & 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 Defence, 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
  King's Indian Defence, Sämisch Variation
  The Sämisch Variation of the King's Indian Defence is a chess opening that begins with the moves:A player who had trouble against the Sämisch was Bobby Fischer...
  
  
• E81 King's Indian, Sämisch, 5...O-O
• E82 King's Indian, Sämisch, double Fianchetto Variation
• E83 King's Indian, Sämisch, 6...Nc6
• 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, Main

See also

• Chess
  Chess
  Chess is a two-player board game played on a chessboard, a square-checkered board with 64 squares arranged in an eight-by-eight grid. It is one of the world's most popular games, played by millions of people worldwide at home, in clubs, online, by correspondence, and in tournaments.Each player...
  
  
• Chess opening
  Chess opening
  A chess opening is the group of initial moves of a chess game. Recognized sequences of opening moves are referred to as openings as initiated by White or defenses, as created in reply by Black. There are many dozens of different openings, and hundreds of named variants. The Oxford Companion to...
  
  s
• Encyclopaedia of Chess Openings
  Encyclopaedia of Chess Openings
  The Encyclopaedia of Chess Openings is a classification system for the opening moves in a game of chess. It is presented as a five volume book collection describing chess openings...
  
  
• Chess Informant
  Chess Informant
  Chess Informant is a publishing company from Belgrade that periodically produces a book of the same name, as well as the Encyclopaedia of Chess Openings, Encyclopaedia of Chess Endings, Opening Monographs, other print publications, and software Chess Informant (Šahovski Informator) is a...
  
  
• Chess opening theory table
  Chess opening theory table
  A chess opening theory table or ECO table presents lines of moves, typically from the starting position. Notated chess moves are presented in the table from left to right...
  
  
• List of chess openings named after animals
• List of chess openings named after people
• List of chess openings named after places

External links

• Chess Informant official website
• Complete list of ECO codes linked to games and to Wikichess
• Bill Wall's list of opening variations
• Chess Archaeology: Openings classified under ECO from chessarch.com
• Arkansas State University : list of openings with board
• ECO Information and Index
• Scid ECO Extensions
• Searchable Database of ECO Openings