Indian Defence Deep Lines
The deep-line archive of Volume E: named sub-variations of the Nimzo-Indian, Queen's Indian, King's Indian, Catalan and Bogo — the lines that decide real games once both players know the first ten moves.
Few openings have shaped modern chess as much as Indian Defence Deep Lines. It has decided world championships, club trophies and late-night blitz games alike.
After 3…Bb4 the position resolves into a fluid centre — one side has staked a central pawn the other must decide how to challenge, so the structure is still being negotiated.
The moves
After 3... Bb4 — Indian Defence Deep Lines main line
Position breakdown
A factual read of the position after the main line — the files, the centre, the pawn structure and king safety that decide how the middlegame is played. These are computed from the actual board, not generic advice.
Files
Centre control
Fluid centre
The d4/d5/e4/e5 squares — who occupies the centre decides how open the game becomes.
Pawn skeleton
Pawns only — the structure that explains every open file and majority at a glance.
Material level
Queenside pawns 3–3
Kingside pawns 3–3
Development
Knight active
Knight & dark-squared bishop active
King safety
White king e1
Uncastled — take care
Black king e8
Uncastled — take care
Computed from the final position of the main line above — 6 plies, white to move.
Strategic ideas
Ideas for White
Master the move-order subtleties: these lines transpose or diverge by a single tempo, and knowing which is which is preparation itself.
Ideas for Black
Pick one defence per main system and drill it deep — Indian defences reward structure-masters over tacticians.
Main variations (64)
Nimzo, Rubinstein 5.Bd3 d5
E40The classical Rubinstein centre: the main strategic battleground.
Nimzo, Rubinstein 6.a3 Bxc3
E40The a3 trade: the doubled-pawn structure at its purest.
Nimzo, Rubinstein 5.Nge2
E40The Nge2 retreat: maximum flexibility against the pin.
Nimzo, Rubinstein 4...c5
E41The ...c5 strike: immediate central tension in the Rubinstein.
Nimzo, Classical 4...d5
E32The Noa centre: the classical battleground of the Qc2 Nimzo.
Nimzo, Classical 5.a3
E32The a3 trade decision: the Sämisch-style structure inside the Classical.
Nimzo, Classical 4...c5
E38The ...c5 counter: immediate central tension against Qc2.
Nimzo, Leningrad 4...c5
E30The ...c5 strike against the Leningrad's Bg5 setup.
Nimzo, Sämisch 5...c5
E24The ...c5 strike: hitting the big centre at once.
Nimzo, Sämisch 6.e3
E27The quiet e3 setup: solid development in the Sämisch structure.
Nimzo, Three Knights 4...c5
E21The ...c5 strike against the Three Knights setup.
Nimzo, Gligorić 6...d5
E54The Gligorić centre commit: the full main structure.
Nimzo, Gligorić 6...c5
E53The ...c5 strike: immediate tension in the Gligorić setup.
QID, Fianchetto 5.Bg2 Setup
E15The pure fianchetto setup: the QID's signature structure.
QID, Capablanca 7.d5
E16Capablanca's strike: the central explosion in the QID.
QID, Classical 7...Ne4
E17The ...Ne4 outpost: the classical QID's key manoeuvre.
QID, Petrosian 4...Ba6
E12The Petrosian structure: clean trades and long-term pressure.
QID, 4.Nc3 Bb4
E13The Bb4 pin against the 4.Nc3 setup: maximum tension.
QID, 4.e3 Setup
E14The classical 4.e3 setup: solid development fighting for e4.
Bogo, Bd2 Be7
E11The main Bogo retreat: the solid ...Be7 structure.
Bogo, Bd2 Qe7
E11The ...Qe7 setup: keeping the pin tension alive.
Bogo, Nbd2 Setup
E11The knight-block: solid and simple against the check.
Catalan, Open 7.Qc2 a6
E02The main Open tabiya: the ...a6/...b5 setup begins.
Catalan, Open 8.a4 Setup
E02The a4 clamp: winning the c4 pawn back immediately.
Catalan, Closed 7.Qc2 c6
E01The ...c6 support: the solid Closed Catalan structure.
Catalan, 5.Qa4+ Setup
E04The queen check: the immediate path to regaining the pawn.
Catalan, Bb4+ 6.Qxc4
E04The clean recapture: the Nbd7 defence executed.
KID, Classical 6...e5
E90The ...e5 break: the classical KID's central counterattack.
KID, Classical 7.d5 Ne7
E90The d5 closure: the eternal KID structure locked in.
KID, Mar del Plata 9.Ne1
E97The Ne1-d3 regrouping: the Mar del Plata's knight manoeuvre.
KID, Bayonet 9.b4
E97The b4 strike: queenside expansion in the Mar del Plata.
KID, Sämisch 6.Be3
E80The Be3 development: the Sämisch's standard fortress build-up.
KID, Sämisch 7.d5
E81The d5 clamp: closing the centre in the Sämisch structure.
KID, Four Pawns 5.f4
E76The f4 wedge: the Four Pawns' maximalist centre.
KID, Fianchetto 4...O-O5.Bg2 d6 Setup
E62The pure Fianchetto setup: solid development before committing.
KID, Panno 7...a6
E63The Panno's ...a6: the flexible queenside expansion setup.
KID, Averbakh 6.Bg5
E70The early Bg5 pin: the Averbakh's signature harassment.
KID, Four Pawns 6.Nf3 c5
E76The ...c5 strike: the Four Pawns' critical counterattack.
KID, Makagonov h3
E71The h3 prophylaxis: stopping ...Ng4 in the KID main lines.
Blumenfeld, Main 5.Bg5
E60The Bg5 pin: the main treatment of the Blumenfeld gambit.
Blumenfeld, 5...exd5 Setup
E60The central release: the Blumenfeld's forcing lines begin.
KID, Yugoslav 6...c5
E64The ...c5 strike: queenside space in the Fianchetto KID.
KID, Orthodox 9.Ne1
E94The Ne1 manoeuvre: the Orthodox defence's key regrouping.
KID, Petrosian 8.Bg5
E93The Bg5 pin: the Petrosian system's main line pressure.
KID, Sämisch 6...e5 7.Nge2
E84The Nge2 development: the Sämisch's standard regrouping.
KID, Four Pawns 7.d5 e6
E76The ...e6 strike: the Four Pawns' critical counterattack.
KID, ...c5 Setup
E70The ...c5 strike: the Benoni-style counter before the fianchetto.
KID, Fianchetto Yugoslav c5
E64The ...c5 setup: the Yugoslav system's queenside expansion.
KID, Classical 9.b4 Bayonet
E97The Bayonet's b4: queenside expansion before the storms.
Catalan, Closed 8.b3 dxc4
E08The b3 pressure: the Closed Catalan's signature squeeze begins.
Catalan, Open 9...b5 10.a4
E05The a4 strike: undermining the queenside chain at once.
Nimzo, Classical 4...O-O 5.a3
E32The a3 trade decision: the Classical's structural crossroads.
Nimzo, Rubinstein 6.a3 Setup
E40The a3 question: the Rubinstein's structural decision point.
QID, 4.g3 Bb7 5.Bg2 Be7 6.O-O
E15The castling-first setup: solid, flexible QID development.
Bogo, ...a5 Setup
E11The ...a5 space setup: queenside expansion before consolidating.
Nimzo, Kmoch g3 Setup
E21The g3 fianchetto: the Kmoch system's solid development.
Catalan, Open Bb4+ Setup
E04The check-first defence: disturbing development early.
Catalan, ...c6 Setup
E04The ...c6 defence: solid expansion against the Catalan bind.
KID, Sämisch ...b6 Setup
E82The ...b6 setup: solid development before the counterstrikes.
KID, Sämisch ...Nc6 Setup
E80The ...Nc6 development: fast piece play against the Sämisch.
KID, Zinnowitz Setup
E80The Zinnowitz's Nge2: the flexible Sämisch regrouping.
QID, 4.Nc3 Bb4 Setup
E13The Bb4 pin setup against 4.Nc3 — maximum tension early.
KID, Classical ...Nbd7 Setup
E60The ...Nbd7-first setup: flexible development before committing.
Catalan, Open ...b5 9.Bg5
E05The Bg5 pin: the classical pressure build-up in the Open Catalan.
Plans & pawn structures
- 1The centre is still fluid: decide early whether to lock it with a pawn advance or dissolve it with an exchange, because that choice picks the whole middlegame plan for you.
- 2Watch the pawn breaks — both yours and your opponent's. In these structures the player who times the central break better usually wins the game.
- 3Trade correctly: before every exchange ask which piece benefits from the resulting square colours and pawn structure.
Typical middlegame structures
The main line leads to a fluid centre — one side has staked a central pawn the other must decide how to challenge, so the structure is still being negotiated. No files have opened yet, so this is a manoeuvring struggle: improve your pieces and prepare the pawn break that will open the position on your terms.
Traps & tactical motifs
Every sharp opening has its traps — study the forcing lines around the centre and the f7/f2 squares before playing this in rated games.
Watch the typical motifs: pins against the pinned piece, knight forks after the natural captures, and queen sorties to a2/g2-style squares.
How to Play Against the Indian Defence Deep Lines
- As White, strike at the fluid centre immediately with your own central pawn or piece pressure, before the opponent locks it into a shape that favours them.
Reaches the same position as
These openings arrive at the very same board position by a different move order — a transposition. Knowing them lets you steer between systems and recognise when your opponent has walked into familiar territory.
Study plan & who it's for
Solidly intermediate. The main lines require real study, but the payoff is positions you can play for a lifetime. Best investment for Black players around 1400–2000.
Play through the main line above until the piece setup feels natural.
Learn the two or three critical pawn breaks for both sides.
Drill one variation at a time — always connecting moves to plans.