D19 Slav Defense: Czech Variation, Dutch Variation
D19 holds three named lines, all under the name Slav Defense. It leaves D18 (Slav Defense: Czech Variation, Classical System) with 6...e6 7.Bxc4 Bb4 8.O-O. Black, to move in that position, has 47 legal moves, the most of the 10 Slav Defense codes. At 15 plies, its reference line is the longest of the 10 Slav Defense codes. Black has three minor pieces off their first squares, level for the most of the 10 Slav Defense codes.
| # | White | Black |
|---|---|---|
| 1 | d4 | d5 |
| 2 | c4 | c6 |
| 3 | Nf3 | Nf6 |
| 4 | Nc3 | dxc4 |
| 5 | a4 | Bf5 |
| 6 | e3 | e6 |
| 7 | Bxc4 | Bb4 |
| 8 | O-O |
Moves only D19 plays
Same as D18 up to 6.e3, then:
- 6...e6 The e-pawn advances to e6, covering d5 and f5, opening a line for the queen on d8 and the bishop on f8.
- 7.Bxc4 The bishop on f1 takes the pawn on c4, opening a line for the rook on h1.
- 7...Bb4 The bishop leaves f8 for b4, opening a line for the rook on h8, attacking the knight on c3, pinning the knight on c3 to its king.
- 8.O-O White castles kingside, opening a line for the queen on d1, guarding the pawn on g2.
Lines filed under D19
All three share their first 15 plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Slav Defense: Czech Variation, Dutch Variation | (the shared start itself) | 15 | White castled |
| Slav Defense: Czech Variation, Classical System, Main Line | 8...O-O 9.Qe2 | 17 | both castled |
| Slav Defense: Czech Variation, Dutch Variation, Sämisch Variation | 8...O-O 9.Qe2 Ne4 10.g4 | 19 | both castled |
Slav Defense: Czech Variation, Classical System, Main Line
- 8...O-O Black castles kingside, opening a line for the queen on d8, guarding the pawn on g7.
- 9.Qe2 The queen goes from d1 to e2, opening a line for the rook on f1, guarding the bishop on c4.
Slav Defense: Czech Variation, Dutch Variation, Sämisch Variation
- 8...O-O Black castles kingside, opening a line for the queen on d8, guarding the pawn on g7.
- 9.Qe2 The queen goes from d1 to e2, opening a line for the rook on f1, guarding the bishop on c4.
- 9...Ne4 The knight goes from f6 to e4, opening a line for the queen on d8, attacking the knight on c3.
- 10.g4 The g-pawn advances two squares to g4, covering f5 and h5, attacking the bishop on f5.
The road to D19
- 1.d4 … 5.a4eight earlier stops: A40, D00, D06, D10, D11, D15, D16
- 5...Bf5D17 Czech Variation
- 6.e3D18 Classical System
- 8.O-OD19
The position after 8.O-O
White has brought out the knight on c3, knight on f3 and bishop on c4; Black the knight on f6, bishop on b4 and bishop on f5. White has a half-open c-file; Black a half-open d-file. Black could capture with Bxc3, Qxd4.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| E54 | Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation | ten squares: a2, a4, c5, f5, c6, c8, e8, f8 … |
| D17 | Slav Defense: Czech Variation | 11 squares: e1, f1, g1, h1, e2, e3, b4, c4 … |
| E57 | Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense | 11 squares: a3, a4, d4, f5, c6, b8, c8, e8 … |
| D27 | Queen’s Gambit Accepted: Classical Defense, Main Line | 12 squares: b1, a2, c3, a4, b4, c5, f5, a6 … |
| D45 | Semi-Slav Defense: Main Line | 12 squares: e1, f1, g1, h1, a2, a4, b4, c4 … |
| D47 | Semi-Slav Defense: Semi-Meran Variation | 12 squares: e1, f1, g1, h1, a2, a4, b4, f5 … |
| E55 | Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation | 12 squares: a2, a4, c5, f5, c6, d7, b8, c8 … |