E33 Nimzo-Indian Defense: Classical Variation, Zurich Variation
E33 holds five named lines, all under the name Nimzo-Indian Defense. It leaves E32 (Nimzo-Indian Defense: Classical Variation) with 4...Nc6. With five named lines it is the third-largest code of the 40 Nimzo-Indian Defense codes. None of its five lines contains a capture.
| # | White | Black |
|---|---|---|
| 1 | d4 | Nf6 |
| 2 | c4 | e6 |
| 3 | Nc3 | Bb4 |
| 4 | Qc2 | Nc6 |
Moves only E33 plays
Same as E32 up to 4.Qc2, then:
- 4...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8, guarding the bishop on b4.
Lines filed under E33
All five share their first eight plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Nimzo-Indian Defense: Classical Variation, Zurich Variation | (the shared start itself) | 8 | |
| Nimzo-Indian Defense: Classical Variation, Zurich Variation | 5.Nf3 | 9 | |
| Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation | 5.Nf3 d6 | 10 | |
| Nimzo-Indian Defense: Classical Variation, Zurich Variation | 5.Nf3 O-O 6.e3 | 11 | Black castled |
| Nimzo-Indian Defense: Classical Variation, Zurich Variation | 5.Nf3 d6 6.Bd2 | 11 |
The road to E33
- 1.d4 … 3.Nc3three earlier stops: A40, A45, A50
- 3...Bb4E20 Nimzo-Indian Defense
- 4.Qc2E32 Classical Variation
- 4...Nc6E33
The position after 4...Nc6
White has brought out the knight on c3; Black the knight on c6, knight on f6 and bishop on b4. White could capture with Qxh7. White is to move and has 33 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| E20 | Nimzo-Indian Defense | four squares: d1, c2, c6, b8 |
| E22 | Nimzo-Indian Defense: Spielmann Variation | four squares: c2, b3, c6, b8 |
| E34 | Nimzo-Indian Defense: Classical Variation, Noa Variation | four squares: d5, c6, d7, b8 |
| E38 | Nimzo-Indian Defense: Classical Variation, Berlin Variation | four squares: c5, c6, c7, b8 |
| E23 | Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit | five squares: c2, b3, d4, c5, c7 |
| E21 | Nimzo-Indian Defense: Three Knights Variation | six squares: d1, g1, c2, f3, c6, b8 |
| E24 | Nimzo-Indian Defense: Sämisch Variation | six squares: d1, a2, c2, a3, c6, b8 |