# Teoria delle aperture negli scacchi/Indice ECO
## A – Aperture di fianco

Divise il sezioni a seconda del momento in cui il pedone di fianco viene spinto:
* A00–A39: se il Bianco spinge un pedone di fianco al posto di 1.e4 o 1.d4
* A40–A44: risposte atipiche a 1.d4, quindi non 1...d5, 1...Cf6 o 1...f5
* A45–A49: risposte atipiche a 1.d4 Cf6, quindi non 2. c4
* A50–A79: atipici Sistemi Indiani, 1.d4 Cf6 2.c4 senza 2...e6 or 2...g6
* A80–A99: 1.d4 f5, ovvero la Difesa Olandese

### A00–A09

White first moves other than 1.e4, 1.d4, 1.c4:
* A00 Irregular Openings
   * Anderssen Opening: 1.a3
      * Anderssen Opening, Polish Gambit: 1...a5 2.b4
      * Anderssen Opening, Bugayev Attack: 1...e5 2.b4
      * Anderssen Opening, Creepy Crawly Formation: 1...e5 2.h3 d5
      * Anderssen Opening, Andersspike: 1...g6 2.g4
      * Anderssen Opening, Spider Sense Gambit: 1...d5 2.d4 Nc6 3.Nf3 Bf5 4.Bf4 e6 5.Nc3 Bd6 6.e3 Nf6 7.g3 h6 8.Bg2 Rc8 9.0-0 0-0
      * Anderssen Opening, Sammarinese Gambit: 1...a6
   * Ware Opening: 1.a4
      * Ware Opening, Cologne Gambit: 1...b6 2.d4 d5 3.Nc3 Nd7
      * 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
   * Sodium Attack: 1.Na3
      * Sodium Attack, Celadon Variation: 1...e5 2.d3 Bxa3 3.bxa3 d5 4.e3 c5 5.Rb1
      * Sodium Attack, Durkin Gambit: 1...e5 2.Nc4 Nc6 3. e4 f5
      * Sodium Attack, Chenoboskion Variation: 1...g6 2.g4
   * Polish Opening: 1.b4
      * Polish Opening, Symmetrical Variation: 1...b5
      * 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
      * Polish Opening, Dutch Defence: 1...f5
   * Saragossa Opening: 1.c3
   * Van Geet Opening: 1.Nc3
   * Van 't Kruijs Opening: 1.e3
   * Mieses Opening: 1.d3
   * Barnes Opening: 1.f3
      * Barnes Opening, Hammerschlag Variation: 1...e5 2.Kf2
   * King's Fianchetto Opening: 1.g3
      * Myers Defence 1...g5
   * Grob's Attack: 1.g4
   ** Alessi Gambit: 1...f5
   ** Double Grob Variation: 1...g5
         * Coca-Cola Gambit: 1...g5 2.f4
   * Clemenz Opening: 1.h3
      * Spike Lee Gambit: 1...h5 2.g4
   * Kádas Opening: 1.h4
      * Koola-Koola Variation: 1...a5
      * Myers Variation: 1...d5 2.d4 c5 3.e4
      * Kádas Gambit: 1...c5 2.b4
         * Kádas Gambit with 3.c3: 1...e5 2.d4 exd4 3.c3
      * Steinbok Gambit: 1...f5 2.e4 fxe4 3.d3
      * Schneider Gambit: 1...g5
   * Amar Opening: 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: 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 or Zukertort 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 (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 (properly): 1...d5 2.c4 (without: 2...c6, 2...e6)
   * Advance Variation: 2...d4
   * Advance Variation, Michel Gambit: 2...d4 b4 3. f6
   * Accepted: 2...dxc4
   * Accepted, Keres Variation: 2...dxc4 3.e3 Be6

### A10–A39

1.c4: English Opening
* A10: 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, 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 (including Englund Gambit, Polish Defence, Queen's Knight Defence, Franco-Indian Defence, English 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 Queen's Pawn Game, Trompowsky Attack
* A46 Queen's Pawn Game, Torre Attack
* A47 Queen's Indian Defence
* A48 King's Indian, 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 Queen's Pawn Game (including Black Knights' Tango)
* A51 Budapest Gambit Declined
* A52 Budapest Gambit
* A53 Old Indian Defence
* A54 Old Indian, Ukrainian Variation
* A55 Old Indian, Main line
* A56 Benoni Defence
* 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 Defence

* 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 without 1...e5, 1...e6, 1...d5, 1...Nf6, 1...g6, 1...d6, 1...c6, 1...c5.
** Nimzowitsch Defence 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 (Greek Defence) 1...b6 (without 2.d4 e6 3.c4 (A40))
*** Matinovsky Gambit 1...b6 2.d4 Bb7 3...f5
** Hippopotamus Defence
** and others
* B01 Scandinavian Defence (Center Counter Defence) 1...d5
** Tennison Gambit 2.Nf3
** Valencian Variation, 3...Qd8
* B02 Alekhine's Defence
** 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 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 Defence
* 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
* B98 Sicilian, Najdorf, 7...Be7
* B99 Sicilian, Najdorf, 7...Be7 Main line

## C – Open Games and the French Defence

* 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 (includes Alapin's Opening, Centre Pawn Opening, Napoleon Opening, Portuguese Opening, Danvers Opening, Bongcloud Attack)
* C21 Center Game (includes Danish Gambit)
* C22 Center Game
* C23 Bishop's Opening
* C24 Bishop's Opening, Berlin Defence
* C25 Vienna Game
* C26 Vienna Game, Falkbeer Variation
* C27 Vienna Game, Frankenstein–Dracula Variation
* C28 Vienna Game
* C29 Vienna Gambit, Kaufmann Variation including Würzburger Trap
* 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 McDonnell Gambit, or Muzio Gambit
* C38 King's Gambit Accepted
* C39 King's Gambit Accepted, Allgaier and Kieseritzky Gambits including Rice Gambit
* C40 King's Knight Opening (includes Gunderam Defence, Brazilian Defence, Greco Defence, Damiano Defence, Elephant Gambit, 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, Konstantinopolsky Opening and some Scotch Game)
* C45 Scotch Game
* C46 Three Knights Game 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 Defence, Semi-Italian Opening, Italian Gambit, Légal Trap, Rousseau Gambit, Koltanowski Gambit and Giuoco Pianissimo)
* C51 Evans Gambit
* C52 Evans Gambit with 4...Bxb4 5.c3 Ba5
* C53 Giuoco Piano
* C54 Giuoco Piano
* C55 Two Knights Defence
* C56 Two Knights Defence
* C57 Two Knights Defence, including the Fried Liver Attack
* C58 Two Knights Defence
* C59 Two Knights Defence
* C60 Ruy Lopez 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
* C69 Ruy Lopez, Exchange Variation, 5.0-0
* C70 Ruy Lopez, 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 (D00–D69)
* 1.d4 Nf6 2.c4 g6 with 3...d5: Grünfeld Defence (D70–D99)

### D00–D69

1.d4 d5: Closed Game
* D00 Queen's Pawn Game (including Blackmar–Diemer Gambit, Halosar Trap and others)
* D01 Richter–Veresov Attack
* D02 Queen's Pawn Game, 2.Nf3 (including the London System)
* D03 Torre Attack, Tartakower Variation
* D04 Queen's Pawn Game, Colle System
* D05 Queen's Pawn Game, Zukertort Variation (including Colle System)
* D06 Queen's Gambit (including the Baltic Defence, Marshall Defence and Symmetrical Defence)
* D07 QGD, Chigorin Defence
* D08 QGD, Albin Countergambit and Lasker Trap
* 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 without 3.Nf3 (Central Variation, Old Variation, and atypical moves by White)
* D21 QGA, 3.Nf3
* D22 QGA, Alekhine Defence (3...a6)
* D23 Queen's Gambit Accepted (3...Nf6)
* 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: 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 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: Grünfeld Defence
* 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 Grünfeld Defence
* 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 Defences

* 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 Queen's Pawn Game (including Neo-Indian Attack, Trompowsky Attack, Catalan Opening and others)
* E01 Catalan, 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
* 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
* 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
* 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

## Note

* ↑ King's Fianchetto Opening: Myers Defense - Chess Openings, su chess.com.