ecocodes
Volume E · Indian defenses‹ E89E91 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

E90 King’s Indian Defense: Normal Variation, Rare Defenses

E90 holds three named lines, all under the name King’s Indian Defense. It leaves E70 (King’s Indian Defense: Normal Variation) with 5.Nf3. Lines of nine other codes continue from its position, the fourth-widest spread of the 39 King’s Indian Defense codes. That final move, by the knight, opens a line for the rook on h1.

Score sheet
#WhiteBlack
1d4Nf6
2c4g6
3Nc3Bg7
4e4d6
5Nf3

Lines filed under E90

All three share their first nine plies, the whole reference line.

NameAfter the shared startPliesAt the end
King’s Indian Defense: Normal Variation, Rare Defenses(the shared start itself)9
King’s Indian Defense: Larsen Variation5...O-O 6.Be311Black castled
King’s Indian Defense: Zinnowitz Variation5...O-O 6.Bg511Black castled

King’s Indian Defense: Larsen Variation

  1. 5...O-O Black castles kingside, opening a line for the queen on d8, guarding the bishop on g7.
  2. 6.Be3 The bishop leaves c1 for e3, opening a line for the rook on a1 and the queen on d1.

King’s Indian Defense: Zinnowitz Variation

  1. 5...O-O Black castles kingside, opening a line for the queen on d8, guarding the bishop on g7.
  2. 6.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.

The road to E90

  1. 1.d4 … 3...Bg7five earlier stops: A40, A45, A50, E60, E61
  2. 4.e4E70 Normal Variation
  3. 4...d6E70 Normal Variation
  4. 5.Nf3E90

The position after 5.Nf3

White has brought out the knight on c3 and knight on f3; Black the knight on f6 and bishop on g7. Black could capture with Nxe4. Black is to move and has 34 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed22Moves spent on pawns32Pawns on d4, e4, d5, e520Squares attacked in the other half73not castlednot castled

Codes that branch off from E90

The reference lines of one other code leave E90 from the position after 5.Nf3, each with its own moves.

CodeMovesReference line
E915...O-O 6.Be2King’s Indian Defense: Orthodox Variation

Closest boards in other codes

CodeLineDiffers on
E80King’s Indian Defense: Sämisch Variationthree squares: g1, f2, f3
A42Modern Defense: Averbakh Systemfour squares: g1, f3, f6, g8
B08Pirc Defense: Classical Variationfour squares: c2, c4, g7, f8
D94Grünfeld Defense: Three Knights Variation, Burille Variationfour squares: e3, e4, d5, d6
E62King’s Indian Defense: Fianchetto Variation, Delayed Fianchettofour squares: e2, g2, g3, e4
E71King’s Indian Defense: Makogonov Variationfour squares: g1, h2, f3, h3
E72King’s Indian Defense: Normal Variation, Deferred Fianchettofour squares: g1, g2, f3, g3

Where lines continue from here

Besides the codes above, they belong to E92, E93, E94, E95, E96, E97, E98, E99.

Volume E

  1. 00
  2. 01
  3. 02
  4. 03
  5. 04
  6. 05
  7. 06
  8. 07
  9. 08
  10. 09
  11. 10
  12. 11
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  96. 95
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  98. 97
  99. 98
  100. 99

Open this line in the finderAll King’s Indian Defense codes