E53 Nimzo-Indian Defense: Normal Variation, Gligoric System
E53 holds three named lines, all under the name Nimzo-Indian Defense. It leaves E48 (Nimzo-Indian Defense: Normal Variation, Classical Defense) with 6.Nf3 c5. That final move, by the c-pawn, covers b4 and d4 and opens a line for the queen on d8. Of all other reference positions, the board of E51 (Normal Variation, Ragozin Variation) comes closest, four squares apart.
| # | White | Black |
|---|---|---|
| 1 | d4 | Nf6 |
| 2 | c4 | e6 |
| 3 | Nc3 | Bb4 |
| 4 | e3 | O-O |
| 5 | Bd3 | d5 |
| 6 | Nf3 | c5 |
Lines filed under E53
All three share their first 12 plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Nimzo-Indian Defense: Normal Variation, Gligoric System | (the shared start itself) | 12 | Black castled |
| Nimzo-Indian Defense: Normal Variation, Gligoric System | 7.O-O Nbd7 | 14 | both castled |
| Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres Variation | 7.O-O b6 | 14 | both castled |
Nimzo-Indian Defense: Normal Variation, Gligoric System
- 7.O-O White castles kingside, opening a line for the queen on d1, guarding the pawn on g2.
- 7...Nbd7 The knight leaves b8 for d7, opening a line for the rook on a8.
Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres Variation
- 7.O-O White castles kingside, opening a line for the queen on d1, guarding the pawn on g2.
- 7...b6 The b-pawn advances to b6, covering a5 and c5, opening a line for the bishop on c8.
The road to E53
- 1.d4 … 4...O-Osix earlier stops: A40, A45, A50, E20, E40, E46
- 5.Bd3E47 Normal Variation
- 5...d5E48 Classical Defense
- 6...c5E53
The position after 6...c5
White has brought out the knight on c3, knight on f3 and bishop on d3; Black the knight on f6 and bishop on b4. White could capture with Bxh7+, cxd5, dxc5. White is to move and has 36 legal moves.
Codes that branch off from E53
The reference lines of two other codes leave E53 from the position after 6...c5, each with its own moves.
| Code | Moves | Reference line |
|---|---|---|
| E54 | 7.O-O dxc4 8.Bxc4 | Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation |
| E56 | 7.O-O Nc6 | Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense |
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| E52 | Nimzo-Indian Defense: Normal Variation, Schlechter Defense | four squares: c5, b6, b7, c7 |
| E47 | Nimzo-Indian Defense: Normal Variation | six squares: g1, f3, c5, d5, c7, d7 |
| E50 | Nimzo-Indian Defense | six squares: f1, d3, c5, d5, c7, d7 |
| D55 | Queen’s Gambit Declined: Modern Variation, Normal Line | eight squares: c1, f1, d3, b4, c5, g5, c7, e7 |
| E46 | Nimzo-Indian Defense: Normal Variation | eight squares: f1, g1, d3, f3, c5, d5, c7, d7 |
| D40 | Queen’s Gambit Declined: Semi-Tarrasch Defense | nine squares: f1, e2, d3, e3, b4, e8, f8, g8 … |
| D45 | Semi-Slav Defense: Main Line | nine squares: f1, d3, b4, c5, c6, e8, f8, g8 … |
Where lines continue from here
Eight named lines filed under other codes pass through the position after 6...c5. Besides the codes above, they belong to E55, E57, E58, E59.