E99 King’s Indian Defense: Orthodox Variation, Classical System, Traditional Line
E99 holds two named lines, all under the name King’s Indian Defense. It leaves E98 (King’s Indian Defense: Orthodox Variation, Classical System) with 9...Nd7 10.f3 f5. At 20 plies, its reference line is the longest of the 39 King’s Indian Defense codes. Its deepest line, King’s Indian Defense: Orthodox Variation, Classical System, Benko Attack, runs to 11.g4, the fifth-longest of the 39 King’s Indian Defense codes. Both kings have castled by the end of the reference line, White on move 7 and Black on move 5.
| # | White | Black |
|---|---|---|
| 1 | d4 | Nf6 |
| 2 | c4 | g6 |
| 3 | Nc3 | Bg7 |
| 4 | e4 | d6 |
| 5 | Nf3 | O-O |
| 6 | Be2 | e5 |
| 7 | O-O | Nc6 |
| 8 | d5 | Ne7 |
| 9 | Ne1 | Nd7 |
| 10 | f3 | f5 |
Moves only E99 plays
Same as E98 up to 9.Ne1, then:
- 9...Nd7 The knight goes from f6 to d7, opening a line for the bishop on g7.
- 10.f3 The f-pawn advances to f3, covering e4 and g4, opening a line for the rook on f1.
- 10...f5 The f-pawn advances two squares to f5, covering e4 and g4, opening a line for the rook on f8.
Lines filed under E99
Both share their first 20 plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| King’s Indian Defense: Orthodox Variation, Classical System, Traditional Line | (the shared start itself) | 20 | both castled |
| King’s Indian Defense: Orthodox Variation, Classical System, Benko Attack | 11.g4 | 21 | both castled |
King’s Indian Defense: Orthodox Variation, Classical System, Benko Attack
- 11.g4 The g-pawn advances two squares to g4, covering f5 and h5.
The road to E99
The position after 10...f5
White has brought out the knight on c3, knight on e1 and bishop on e2; Black the knight on d7, knight on e7 and bishop on g7. White could capture with exf5. White is to move and has 32 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| E93 | King’s Indian Defense: Petrosian Variation, Normal Defense | ten squares: e1, f1, g1, h1, f2, f3, f5, f6 … |
| E95 | King’s Indian Defense: Orthodox Variation | ten squares: e1, f1, f2, f3, d4, d5, f5, f6 … |
| E94 | King’s Indian Defense: Orthodox Variation | 11 squares: e1, f2, f3, d4, d5, f5, f6, d7 … |
| E97 | King’s Indian Defense: Orthodox Variation, Aronin-Taimanov Defense | 11 squares: e1, f2, f3, d4, d5, f5, c6, f6 … |
| E68 | King’s Indian Defense: Fianchetto Variation, Classical Variation | 12 squares: e1, e2, f2, g2, f3, g3, d4, d5 … |
| A73 | Benoni Defense: Classical Variation, Main Line | 13 squares: e1, f2, f3, c4, c5, e5, f5, f6 … |
| E87 | King’s Indian Defense: Sämisch Variation, Closed Variation | 13 squares: c1, e1, f1, g1, h1, e2, e3, f5 … |