E93 King’s Indian Defense: Petrosian Variation, Normal Defense
E93 holds two named lines, all under the name King’s Indian Defense. It leaves E92 (King’s Indian Defense: Petrosian Variation) with 7...Nbd7. Its deepest line, King’s Indian Defense: Petrosian Variation, Keres Defense, runs to 11.h4, the fifth-longest of the 39 King’s Indian Defense codes. That final move, by the knight, opens a line for the rook on a8.
| # | White | Black |
|---|---|---|
| 1 | d4 | Nf6 |
| 2 | c4 | g6 |
| 3 | Nc3 | Bg7 |
| 4 | e4 | d6 |
| 5 | Nf3 | O-O |
| 6 | Be2 | e5 |
| 7 | d5 | Nbd7 |
Moves only E93 plays
Same as E92 up to 6...e5, then:
- 7.d5 The d-pawn advances to d5, covering c6 and e6, opening a line for the queen on d1.
- 7...Nbd7 The knight leaves b8 for d7, opening a line for the rook on a8.
Lines filed under E93
Both share their first 14 plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| King’s Indian Defense: Petrosian Variation, Normal Defense | (the shared start itself) | 14 | Black castled |
| King’s Indian Defense: Petrosian Variation, Keres Defense | 8.Bg5 h6 9.Bh4 g5 10.Bg3 Nh5 11.h4 | 21 | Black castled |
King’s Indian Defense: Petrosian Variation, Keres Defense
- 8.Bg5 The bishop leaves c1 for g5, opening a line for the rook on a1 and the queen on d1, attacking the knight on f6.
- 8...h6 The h-pawn advances to h6, covering g5, attacking the bishop on g5.
- 9.Bh4 The bishop goes from g5 to h4, attacking the knight on f6.
- 9...g5 The g-pawn advances to g5, covering f4 and h4, attacking the bishop on h4.
- 10.Bg3 The bishop goes from h4 to g3.
The road to E93
- 1.d4 … 6.Be2nine earlier stops: A40, A45, A50, E60, E61, E70, E90, E91
- 6...e5E92 Orthodox Variation
- 7.d5E92 Petrosian Variation
- 7...Nbd7E93
The position after 7...Nbd7
White has brought out the knight on c3, knight on f3 and bishop on e2; Black the knight on d7, knight on f6 and bishop on g7. White could capture with Nxe5. White is to move and has 37 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| E95 | King’s Indian Defense: Orthodox Variation | five squares: e1, g1, h1, d4, d5 |
| A72 | Benoni Defense: Classical Variation | six squares: c4, c5, e5, c7, d7, b8 |
| E91 | King’s Indian Defense: Orthodox Variation | six squares: d4, d5, e5, d7, e7, b8 |
| E98 | King’s Indian Defense: Orthodox Variation, Classical System | seven squares: e1, f1, g1, h1, f3, d7, e7 |
| E67 | King’s Indian Defense: Fianchetto Variation, Debrecen Defense | eight squares: e2, g2, g3, d4, e4, d5, e5, e7 |
| E94 | King’s Indian Defense: Orthodox Variation | eight squares: e1, f1, g1, h1, d4, d5, d7, b8 |
| E97 | King’s Indian Defense: Orthodox Variation, Aronin-Taimanov Defense | eight squares: e1, f1, g1, h1, d4, d5, c6, d7 |