E66 King’s Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line
E66 holds a single named line. It leaves E65 (King’s Indian Defense: Fianchetto Variation, Yugoslav Variation) with 7...Nc6 8.d5. Both kings have castled by the end of the reference line, White on move 6 and Black on move 4. That final move, by the d-pawn, covers c6 and e6, opens a line for the queen on d1 and attacks the knight on c6.
| # | White | Black |
|---|---|---|
| 1 | d4 | Nf6 |
| 2 | c4 | g6 |
| 3 | Nf3 | Bg7 |
| 4 | g3 | O-O |
| 5 | Bg2 | d6 |
| 6 | O-O | c5 |
| 7 | Nc3 | Nc6 |
| 8 | d5 |
Moves only E66 plays
Same as E65 up to 7.Nc3, then:
- 7...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8.
- 8.d5 The d-pawn advances to d5, covering c6 and e6, opening a line for the queen on d1, attacking the knight on c6.
The road to E66
Two of the eight named positions on the way are reached by a move order other than their own.
- 1.d4 … 6.O-Osix earlier stops: A40, A45, A50, E60
- 6...c5E64 Yugoslav System by another order
- 7.Nc3E65 Yugoslav Variation
- 8.d5E66
The position after 8.d5
White has brought out the knight on c3, knight on f3 and bishop on g2; Black the knight on c6, knight on f6 and bishop on g7. Black could capture with Nxd5. Black is to move and has 35 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| A39 | English Opening: Symmetrical Variation, Mecking Variation | four squares: d4, d5, d6, d7 |
| A63 | Benoni Defense: Fianchetto Variation, Hastings Defense | four squares: c4, c6, d7, e7 |
| A89 | Dutch Defense: Leningrad Variation, Matulovic Variation | six squares: d4, c5, d5, f5, c7, f7 |
| E63 | King’s Indian Defense: Fianchetto Variation, Panno Variation | six squares: d4, c5, d5, a6, a7, c7 |
| A88 | Dutch Defense: Leningrad Variation, Warsaw Variation | seven squares: d4, c5, d5, f5, c6, f7, b8 |
| D75 | Neo-Grünfeld Defense: Delayed Exchange Variation | seven squares: c4, d4, d5, c6, d6, f6, b8 |
| A62 | Benoni Defense: Fianchetto Variation | eight squares: e1, f1, g1, h1, c4, c6, e7, b8 |