ECO Volume E: Indian Defenses

100 ECO codes, 357 named lines. Linked names have their own family guide on this site; unlinked names are listed for reference only.

What sets this volume apart

Volume E’s headline character is the Indian Defenses: Black’s hypermodern replies to 1.d4 Nf6 that delay ...d5 on purpose, letting White build central space first before undermining or fianchettoing against it later - the King’s Indian, Nimzo-Indian, Queen’s Indian, and Bogo-Indian Defenses among them. The Catalan Opening also lives in this volume’s own numeric range (its early codes, E00-E09) purely because of a shared 1.d4 Nf6 2.c4 e6 move order with the Indian Defenses, even though the Catalan itself is a White-initiated system rather than one of Black’s defenses.

All codes in Volume E

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ECO Volume E codes
Code	Name(s)	Lines
E00	Catalan OpeningIndian Defense	6
E01	Catalan Opening	2
E02	Catalan Opening: Open Defense	1
E03	Catalan Opening: Open Defense	2
E04	Catalan Opening: Open Defense	3
E05	Catalan Opening: Open Defense	2
E06	Catalan Opening: Closed	4
E07	Catalan Opening: Closed	2
E08	Catalan Opening: Closed	7
E09	Catalan Opening: Closed	6
E10	Blumenfeld CountergambitBlumenfeld Countergambit AcceptedIndian Defense	7
E11	Bogo-Indian Defense: Retreat Variation	21
E12	Queen’s Indian Defense: Kasparov-Petrosian Variation	18
E13	Queen’s Indian Defense: Kasparov Variation	1
E14	Queen’s Indian Defense, with e3Queen’s Indian Defense, with e3, Bb4+ LineQueen’s Indian Defense: Spassky System	22
E15	Queen’s Indian Defense: Fianchetto Variation	12
E16	Queen’s Indian Defense	3
E17	Queen’s Indian Defense	8
E18	Queen’s Indian Defense: Classical Variation	3
E19	Queen’s Indian Defense: Classical Variation	1
E20	Nimzo-Indian Defense	7
E21	Nimzo-Indian Defense: Three Knights Variation	4
E22	Nimzo-Indian Defense: Spielmann Variation	1
E23	Nimzo-Indian Defense: Spielmann Variation	4
E24	Nimzo-Indian Defense: Sämisch Variation	2
E25	Nimzo-Indian Defense: Sämisch Variation	3
E26	Nimzo-Indian Defense: Sämisch Variation	2
E27	Nimzo-Indian Defense: Sämisch Variation	1
E28	Nimzo-Indian Defense: Sämisch Variation	1
E29	Nimzo-Indian Defense: Sämisch Variation	2
E30	Nimzo-Indian Defense: Leningrad Variation	2
E31	Nimzo-Indian Defense: Leningrad Variation	1
E32	Nimzo-Indian Defense: Classical Variation	3
E33	Nimzo-Indian Defense: Classical Variation	2
E34	Nimzo-Indian Defense: Classical Variation	2
E35	Nimzo-Indian Defense: Classical Variation	1
E36	Nimzo-Indian Defense: Classical Variation	4
E37	Nimzo-Indian Defense: Classical Variation	3
E38	Nimzo-Indian Defense: Classical Variation	3
E39	Nimzo-Indian Defense: Classical Variation	2
E40	Nimzo-Indian Defense: Rubinstein System	2
E41	Nimzo-Indian Defense: Rubinstein System	3
E42	Nimzo-Indian Defense: Rubinstein System	3
E43	Nimzo-Indian Defense: St. Petersburg Variation	12
E44	Nimzo-Indian Defense: St. Petersburg Variation	3
E45	Nimzo-Indian Defense: St. Petersburg Variation	1
E46	Nimzo-Indian Defense	3
E47	Nimzo-Indian Defense: Normal Variation	1
E48	Nimzo-Indian Defense	2
E49	Nimzo-Indian Defense: Normal Variation	1
E50	Nimzo-Indian Defense	1
E51	Nimzo-Indian Defense: Normal Variation	3
E52	Nimzo-Indian Defense: Normal Variation	2
E53	Nimzo-Indian Defense: Normal Variation	3
E54	Nimzo-Indian Defense: Normal Variation	3
E55	Nimzo-Indian Defense: Normal Variation	1
E56	Nimzo-Indian Defense: Normal Variation	1
E57	Nimzo-Indian Defense: Normal Variation	1
E58	Nimzo-Indian Defense: Normal Variation	1
E59	Nimzo-Indian Defense: Normal Variation	2
E60	Grünfeld Defense: Counterthrust VariationIndian Defense: Anti-GrünfeldKing’s Indian DefenseQueen’s Pawn, Mengarini Attack	14
E61	King’s Indian Defense	6
E62	King’s Indian Defense: Fianchetto Variation	7
E63	King’s Indian Defense: Fianchetto Variation	4
E64	King’s Indian Defense: Fianchetto Variation	5
E65	King’s Indian Defense: Fianchetto Variation	2
E66	King’s Indian Defense: Fianchetto Variation	1
E67	King’s Indian Defense: Fianchetto Variation	2
E68	King’s Indian Defense: Fianchetto Variation	2
E69	King’s Indian Defense: Fianchetto Variation	1
E70	King’s Indian Defense	4
E71	King’s Indian Defense	2
E72	King’s Indian Defense	2
E73	King’s Indian Defense: Averbakh Variation	9
E74	King’s Indian Defense: Averbakh Variation	3
E75	King’s Indian Defense: Averbakh Variation	1
E76	King’s Indian Defense: Four Pawns Attack	3
E77	King’s Indian Defense: Four Pawns Attack	4
E78	King’s Indian Defense: Four Pawns Attack	1
E79	King’s Indian Defense: Four Pawns Attack	1
E80	King’s Indian Defense: Sämisch Variation	1
E81	King’s Indian Defense: Sämisch Variation	9
E82	King’s Indian Defense: Sämisch Variation	1
E83	King’s Indian Defense: Sämisch Variation	3
E84	King’s Indian Defense: Sämisch Variation	1
E85	King’s Indian Defense: Sämisch Variation	1
E86	King’s Indian Defense: Sämisch Variation	1
E87	King’s Indian Defense: Sämisch Variation	3
E88	King’s Indian Defense: Sämisch Variation	1
E89	King’s Indian Defense: Sämisch Variation	1
E90	King’s Indian Defense	3
E91	King’s Indian Defense	2
E92	King’s Indian Defense	5
E93	King’s Indian Defense: Petrosian Variation	2
E94	King’s Indian Defense: Orthodox Variation	6
E95	King’s Indian Defense: Orthodox Variation	1
E96	King’s Indian Defense: Orthodox Variation	1
E97	King’s Indian Defense: Orthodox Variation	6
E98	King’s Indian Defense: Orthodox Variation	3
E99	King’s Indian Defense: Orthodox Variation	2

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