# ♟️ NIMZO-INDIAN — CLASSICAL LINE
### Deep Guide from **Move 7 Onward**
## 🔱 Reference Position (Tabia)
```
1.d4 Nf6
2.c4 e6
3.Nc3 Bb4
4.Qc2 0-0
5.a3 Bxc3+
6.Qxc3 d5
```
This is the *crossroads*.
White has structure and bishops.
Black has clarity and timing.
Now the real choices begin.
---
# 🅐 **7.Bg5** — The Classical Pin Variation
> *White tries to freeze Black’s center.*
> *Black tries to prove that nothing is frozen.*
---
## 🧠 Strategic Idea (White)
* Pin the knight on f6
* Support e4
* Slow down …c5 / …e5
## 🧠 Strategic Idea (Black)
* Break the pin
* Strike before White finishes development
* Activate pieces aggressively
---
## Main Line
```
7.Bg5 h6
8.Bh4 c5
```
### Why **…h6** first?
* Forces commitment
* Prevents Bg5–f6 tactics later
* Gains luft
---
## After 8…c5 — The Core Position
Black immediately challenges:
* White’s queen on c3
* The c4 pawn
* White’s development lag
---
### White Options Here
### 🔹 A1) **9.e3**
Most solid and classical.
```
9.e3 Nc6
10.Nf3 Re8
```
#### Plans
**Black**
* …e5 break
* Knight to e4
* Pressure on c4
**White**
* Bd3
* Ne2
* 0-0
📌 *This line often transposes into hanging-pawn or IQP structures.*
---
### 🔹 A2) **9.dxc5**
```
9.dxc5 g5!
10.Bg3 Ne4
```
Black immediately seizes initiative.
📌 *This is risky for White and very Nimzo-typical: activity over structure.*
---
### 🔹 A3) **9.Rd1?!**
Looks clever, often inaccurate.
Black responds with:
```
9…Nc6
10.e3 e5!
```
Black breaks through anyway.
---
### 🧠 Verdict on 7.Bg5
* Rich and classical
* Timing-sensitive
* Excellent for **positional players who like tension**
---
# 🅑 **7.e3** — The Rubinstein Hybrid
> *White builds slowly.*
> *Black sharpens the knife quietly.*
---
## Main Line
```
7.e3 c5
8.Bd3 Nc6
9.Ne2
```
### Why **Ne2**?
* Avoids knight trades
* Supports f3/e4 later
* Prepares 0-0
---
## Key Structure
* Symmetrical center
* Potential hanging pawns
* Very high maneuvering content
---
## Black Plans
### Plan 1: Immediate Pressure
```
…dxc4
…Na5
…b6
…Bb7
```
### Plan 2: Central Break
```
…cxd4
…e5
```
---
## Critical Moment
If White delays e4 too long → **Black seizes the initiative**
📌 *This line defines classical Nimzo understanding.*
---
### Endgame Note
This variation frequently simplifies into:
* Knight vs bishop
* Slight Black pull
* Technical grind
---
# 🅒 **7.cxd5** — Early Clarification Line
> *White removes tension.*
> *Black welcomes the honesty.*
---
## Main Line
```
7.cxd5 exd5
8.Bg5 c6
9.e3 Bf5
```
### Structure
* Carlsbad-like
* Fixed center
* Long-term plans dominate
---
## Plans
### White
* Minority attack (b4–b5)
* Central expansion later
* Bishop pair activity
### Black
* …Nbd7
* …Re8
* …Ne4 outpost
📌 *This is one of the most “Capablanca” Nimzo structures.*
---
# 🅓 **7.Nf3** — Development First
Often underestimated.
```
7.Nf3 c5
8.e3 Nc6
9.Bd3
```
### Themes
* Transpositional
* Less forcing
* Flexible
Black keeps:
* Central tension
* Development lead
📌 *Very practical, slightly toothless.*
---
# 🅔 **7.f3?!** — Ambitious but Risky
```
7.f3 c5
8.dxc5 d4!
```
Black strikes immediately.
📌 *Only for prepared White players.*
---
# 🧱 Pawn Structures Arising (Move-7 Specific)
| Structure | Comes From | Who Prefers |
| ------------- | ------------ | ----------------- |
| Hanging Pawns | 7.e3 / 7.Bg5 | Black |
| IQP | 7.e3 | Black |
| Symmetrical | 7.cxd5 | Equal |
| Carlsbad | 7.cxd5 | Strategic players |
---
# ♜ Typical Tactical Motifs (After Move 7)
* **…Ne4** forks
* Queen pressure on c4
* Exchange sacrifice on c3 (rare but thematic)
* Pin-break with …g5
---
# 🧠 Psychological Layer
After move 7:
* White feels “comfortable”
* Black feels “in control”
This mismatch is where Nimzo games are won.
---
# 🧙 Mythic Codex Entry
> *On the seventh step, the student believes the danger has passed.
> That is when the master begins to play.*