E51 Nimzo-Indian Defense: Normal Variation, Ragozin Variation
E51 holds five named lines, all under the name Nimzo-Indian Defense. It leaves E50 (Nimzo-Indian Defense) with 5...d5. With five named lines it is the third-largest code of the 40 Nimzo-Indian Defense codes. That final move, by the d-pawn, covers c4 and e4 and opens a line for the bishop on c8 and the queen on d8.
| # | White | Black |
|---|---|---|
| 1 | d4 | Nf6 |
| 2 | c4 | e6 |
| 3 | Nc3 | Bb4 |
| 4 | e3 | O-O |
| 5 | Nf3 | d5 |
Lines filed under E51
All five share the start 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O and then split two ways at White’s move 5.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Nimzo-Indian Defense: Normal Variation, Ragozin Variation | 5.Nf3 d5 | 10 | Black castled |
| Nimzo-Indian Defense: Normal Variation, Sämisch Deferred | 5.Nf3 d5 6.a3 | 11 | Black castled |
| Nimzo-Indian Defense: Normal Variation, Ragozin Variation | 5.Nf3 d5 6.Bd2 Nc6 | 12 | Black castled |
| Nimzo-Indian Defense: Normal Variation, Ragozin Variation | 5.Nf3 d5 6.Bd2 Nc6 7.a3 | 13 | Black castled |
| Nimzo-Indian Defense: Ragozin Variation | 5.Bd3 d5 6.Nf3 Nc6 7.O-O dxc4 | 14 | Black +1, both castled |
The road to E51
- 1.d4 … 4.e3five earlier stops: A40, A45, A50, E20, E40
- 4...O-OE46 Normal Variation
- 5.Nf3E50 Nimzo-Indian Defense
- 5...d5E51
The position after 5...d5
White has brought out the knight on c3 and knight on f3; Black the knight on f6 and bishop on b4. White could capture with cxd5. White is to move and has 28 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| D55 | Queen’s Gambit Declined: Modern Variation, Normal Line | four squares: c1, b4, g5, e7 |
| E46 | Nimzo-Indian Defense: Normal Variation | four squares: g1, f3, d5, d7 |
| E48 | Nimzo-Indian Defense: Normal Variation, Classical Defense | four squares: f1, g1, d3, f3 |
| E52 | Nimzo-Indian Defense: Normal Variation, Schlechter Defense | four squares: f1, d3, b6, b7 |
| E53 | Nimzo-Indian Defense: Normal Variation, Gligoric System | four squares: f1, d3, c5, c7 |
| D38 | Queen’s Gambit Declined: Ragozin Defense | six squares: e2, e3, e8, f8, g8, h8 |
| D60 | Queen’s Gambit Declined: Orthodox Defense | six squares: c1, b4, g5, d7, e7, b8 |