D86 Grünfeld Defense: Exchange Variation, Classical Variation
D86 holds five named lines, all under the name Grünfeld Defense. It leaves D85 (Grünfeld Defense: Exchange Variation) with 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4. Black’s pieces and pawns attack three squares in White’s half, level for the fewest of the 20 Grünfeld Defense codes. White’s pieces and pawns attack 11 squares in Black’s half, the fourth-highest count of the 20 Grünfeld Defense codes. With five named lines it is the fifth-largest code of the 20 Grünfeld Defense codes.
| # | White | Black |
|---|---|---|
| 1 | d4 | Nf6 |
| 2 | c4 | g6 |
| 3 | Nc3 | d5 |
| 4 | cxd5 | Nxd5 |
| 5 | e4 | Nxc3 |
| 6 | bxc3 | Bg7 |
| 7 | Bc4 |
The move that completes D86
The reference line of D87 plays all of these moves and continues beyond them; D86 is the position reached at 7.Bc4.
- 7.Bc4 The bishop leaves f1 for c4.
Lines filed under D86
All five share their first 13 plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Grünfeld Defense: Exchange Variation, Classical Variation | (the shared start itself) | 13 | |
| Grünfeld Defense: Exchange Variation, Larsen Variation | 7...O-O 8.Ne2 Qd7 | 16 | Black castled |
| Grünfeld Defense: Exchange Variation, Simagin’s Improved Variation | 7...O-O 8.Ne2 Nc6 | 16 | Black castled |
| Grünfeld Defense: Exchange Variation, Simagin’s Lesser Variation | 7...O-O 8.Ne2 b6 | 16 | Black castled |
| Grünfeld Defense: Exchange Variation, Larsen Variation | 7...O-O 8.Ne2 Qd7 9.O-O b6 | 18 | both castled |
The road to D86
- 1.d4 … 3.Nc3five earlier stops: A40, A45, A50, E60, E61
- 3...d5D80 Grünfeld Defense
- 4...Nxd5D85 Exchange Variation
- 7.Bc4D86
The position after 7.Bc4
White has brought out the bishop on c4; Black the bishop on g7. White has a half-open b-file; Black a half-open d-file. Black could capture with Bxd4, Qxd4. Black is to move and has 35 legal moves.
Codes that branch off from D86
The reference lines of three other codes leave D86 from the position after 7.Bc4, each with its own moves.
| Code | Moves | Reference line |
|---|---|---|
| D87 | 7...c5 8.Ne2 O-O | Grünfeld Defense: Exchange Variation, Spassky Variation |
| D88 | 7...c5 8.Ne2 Nc6 9.Be3 O-O 10.O-O cxd4 11.cxd4 | Grünfeld Defense: Exchange Variation, Spassky Variation |
| D89 | 7...c5 8.Ne2 Nc6 9.Be3 O-O 10.O-O Bg4 11.f3 Na5 12.Bd3 cxd4 13.cxd4 Be6 | Grünfeld Defense: Exchange Variation, Spassky Variation |
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| A42 | Modern Defense: Averbakh System | six squares: f1, b2, c3, c4, d6, g8 |
| E70 | King’s Indian Defense: Normal Variation | six squares: f1, b2, c3, c4, f6, d7 |
| E73 | King’s Indian Defense: Normal Variation, Standard Development | six squares: b2, e2, c3, c4, d6, f6 |
| E71 | King’s Indian Defense: Makogonov Variation | eight squares: f1, b2, h2, c3, h3, c4, d6, f6 |
| E72 | King’s Indian Defense: Normal Variation, Deferred Fianchetto | eight squares: f1, b2, g2, c3, g3, c4, d6, f6 |
| E76 | King’s Indian Defense: Four Pawns Attack | eight squares: f1, b2, f2, c3, c4, f4, d6, f6 |
| E80 | King’s Indian Defense: Sämisch Variation | eight squares: f1, b2, f2, c3, f3, c4, d6, f6 |
Where lines continue from here
Five named lines filed under other codes pass through the position after 7.Bc4. All of them belong to the codes listed above.