E46 Nimzo-Indian Defense: Normal Variation
E46 holds three named lines, all under the name Nimzo-Indian Defense. It leaves E40 (Nimzo-Indian Defense: Rubinstein System) with 4...O-O. Lines of 15 other codes continue from its position, the third-widest spread of the 40 Nimzo-Indian Defense codes. Of all other reference positions, the board of E47 (Normal Variation) comes closest, two squares apart.
| # | White | Black |
|---|---|---|
| 1 | d4 | Nf6 |
| 2 | c4 | e6 |
| 3 | Nc3 | Bb4 |
| 4 | e3 | O-O |
The move that completes E46
The reference line of E28 plays all of these moves and continues beyond them; E46 is the position reached at 4...O-O.
- 4...O-O Black castles kingside, opening a line for the queen on d8, guarding the pawn on g7.
Lines filed under E46
All three share their first eight plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Nimzo-Indian Defense: Normal Variation | (the shared start itself) | 8 | Black castled |
| Nimzo-Indian Defense: Reshevsky Variation | 5.Ne2 | 9 | Black castled |
| Nimzo-Indian Defense: Simagin Variation | 5.Ne2 d5 6.a3 Bd6 | 12 | Black castled |
Nimzo-Indian Defense: Reshevsky Variation
- 5.Ne2 The knight leaves g1 for e2, opening a line for the rook on h1.
Nimzo-Indian Defense: Simagin Variation
- 5.Ne2 The knight leaves g1 for e2, opening a line for the rook on h1.
- 5...d5 The d-pawn advances two squares to d5, covering c4 and e4, opening a line for the bishop on c8 and the queen on d8.
- 6.a3 The a-pawn advances to a3, covering b4, opening a line for the rook on a1, attacking the bishop on b4.
- 6...Bd6 The bishop goes from b4 to d6.
The road to E46
- 1.d4 … 3.Nc3three earlier stops: A40, A45, A50
- 3...Bb4E20 Nimzo-Indian Defense
- 4.e3E40 Rubinstein System
- 4...O-OE46
The position after 4...O-O
White has brought out the knight on c3; Black the knight on f6 and bishop on b4. White is to move and has 30 legal moves.
Codes that branch off from E46
The reference lines of three other codes leave E46 from the position after 4...O-O, each with its own moves.
| Code | Moves | Reference line |
|---|---|---|
| E28 | 5.a3 Bxc3+ 6.bxc3 | Nimzo-Indian Defense: Sämisch Variation |
| E47 | 5.Bd3 | Nimzo-Indian Defense: Normal Variation |
| E50 | 5.Nf3 | Nimzo-Indian Defense |
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| E48 | Nimzo-Indian Defense: Normal Variation, Classical Defense | four squares: f1, d3, d5, d7 |
| E51 | Nimzo-Indian Defense: Normal Variation, Ragozin Variation | four squares: g1, f3, d5, d7 |
| E20 | Nimzo-Indian Defense | six squares: e2, e3, e8, f8, g8, h8 |
| E41 | Nimzo-Indian Defense: Rubinstein System | six squares: c5, c7, e8, f8, g8, h8 |
| E43 | Nimzo-Indian Defense: St. Petersburg Variation | six squares: b6, b7, e8, f8, g8, h8 |
| D54 | Queen’s Gambit Declined: Neo-Orthodox Variation | seven squares: a1, c1, b4, d5, g5, d7, e7 |
| E27 | Nimzo-Indian Defense: Sämisch Variation | seven squares: a2, b2, e2, a3, c3, e3, b4 |
Where lines continue from here
Besides the codes above, they belong to E43, E48, E49, E51, E52, E53, E54, E55, E56, E57, E58, E59.