E42 Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation
E42 holds three named lines, all under the name Nimzo-Indian Defense. It leaves E41 (Nimzo-Indian Defense: Rubinstein System) with 5.Ne2. That final move, by the knight, opens a line for the rook on h1. Of all other reference positions, the board of E40 (Rubinstein System) comes closest, four squares apart.
| # | White | Black |
|---|---|---|
| 1 | d4 | Nf6 |
| 2 | c4 | e6 |
| 3 | Nc3 | Bb4 |
| 4 | e3 | c5 |
| 5 | Ne2 |
Lines filed under E42
All three share their first nine plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation | (the shared start itself) | 9 | |
| Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Main Line | 5...cxd4 6.exd4 O-O 7.a3 | 13 | Black castled |
| Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Sherbakov Attack | 5...cxd4 6.exd4 O-O 7.c5 | 13 | Black castled |
Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Main Line
- 5...cxd4 The c-pawn takes the pawn on d4, covering c3 and e3, opening a line for the bishop on b4, attacking the knight on c3.
- 6.exd4 The e-pawn takes the pawn on d4, covering c5 and e5, opening a line for the bishop on c1.
- 6...O-O Black castles kingside, opening a line for the queen on d8, guarding the pawn on g7.
- 7.a3 The a-pawn advances to a3, covering b4, opening a line for the rook on a1, attacking the bishop on b4.
Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Sherbakov Attack
- 5...cxd4 The c-pawn takes the pawn on d4, covering c3 and e3, opening a line for the bishop on b4, attacking the knight on c3.
- 6.exd4 The e-pawn takes the pawn on d4, covering c5 and e5, opening a line for the bishop on c1.
- 6...O-O Black castles kingside, opening a line for the queen on d8, guarding the pawn on g7.
- 7.c5 The c-pawn advances to c5, covering b6 and d6.
The road to E42
- 1.d4 … 3...Bb4four earlier stops: A40, A45, A50, E20
- 4.e3E40 Rubinstein System
- 4...c5E41 Rubinstein System
- 5.Ne2E42
The position after 5.Ne2
White has brought out the knight on c3 and knight on e2; Black the knight on f6 and bishop on b4. Black could capture with Bxc3+, cxd4. Black is to move and has 31 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| E44 | Nimzo-Indian Defense: St. Petersburg Variation | four squares: c5, b6, b7, c7 |
| E20 | Nimzo-Indian Defense | five squares: g1, e2, e3, c5, c7 |
| E21 | Nimzo-Indian Defense: Three Knights Variation | five squares: e2, e3, f3, c5, c7 |
| E38 | Nimzo-Indian Defense: Classical Variation, Berlin Variation | five squares: d1, g1, c2, e2, e3 |
| E43 | Nimzo-Indian Defense: St. Petersburg Variation | six squares: g1, e2, c5, b6, b7, c7 |
| E45 | Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation | six squares: c5, a6, b6, b7, c7, c8 |
| D38 | Queen’s Gambit Declined: Ragozin Defense | seven squares: e2, e3, f3, c5, d5, c7, d7 |