D28 Queen’s Gambit Accepted: Classical Defense, Alekhine System
D28 holds three named lines, all under the name Queen’s Gambit. It leaves D27 (Queen’s Gambit Accepted: Classical Defense, Main Line) with 7.Qe2. Its deepest line, Queen’s Gambit Accepted: Classical, Flohr Variation, runs to 13...Qc7, the second-longest of the 44 Queen’s Gambit codes. That final move, by the queen, opens a line for the rook on f1 and guards the bishop on c4.
| # | White | Black |
|---|---|---|
| 1 | d4 | d5 |
| 2 | c4 | dxc4 |
| 3 | Nf3 | Nf6 |
| 4 | e3 | e6 |
| 5 | Bxc4 | c5 |
| 6 | O-O | a6 |
| 7 | Qe2 |
Lines filed under D28
All three share their first 13 plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Queen’s Gambit Accepted: Classical Defense, Alekhine System | (the shared start itself) | 13 | White castled |
| Queen’s Gambit Accepted: Classical Defense, Alekhine System | 7...b5 | 14 | White castled |
| Queen’s Gambit Accepted: Classical, Flohr Variation | 7...b5 8.Bb3 Nc6 9.Rd1 c4 10.Bc2 Nb4 11.Nc3 Nxc2 12.Qxc2 Bb7 13.d5 Qc7 | 26 | White castled |
Queen’s Gambit Accepted: Classical Defense, Alekhine System
- 7...b5 The b-pawn advances two squares to b5, covering a4 and c4, opening a line for the bishop on c8, attacking the bishop on c4.
Queen’s Gambit Accepted: Classical, Flohr Variation
- 7...b5 The b-pawn advances two squares to b5, covering a4 and c4, opening a line for the bishop on c8, attacking the bishop on c4.
- 8.Bb3 The bishop goes from c4 to b3, opening a line for the queen on e2.
- 8...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8.
- 9.Rd1 The rook goes from f1 to d1.
- 9...c4 The c-pawn advances to c4, covering b3 and d3, opening a line for the bishop on f8, attacking the bishop on b3.
The road to D28
- 1.d4 … 5...c5nine earlier stops: A40, D00, D06, D20, D21, D23, D25, D26
- 6.O-OD26 Normal Line
- 6...a6D27 Main Line
- 7.Qe2D28
The position after 7.Qe2
White has brought out the knight on f3 and bishop on c4; Black the knight on f6. White has a half-open c-file; Black a half-open d-file. Black could capture with Qxd4, cxd4. Black is to move and has 32 legal moves.
Codes that branch off from D28
The reference lines of one other code leave D28 from the position after 7...b5, each with its own moves.
| Code | Moves | Reference line |
|---|---|---|
| D29 | 8.Bb3 Bb7 | Queen’s Gambit Accepted: Classical Defense, Alekhine System, Main Line |
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| D26 | Queen’s Gambit Accepted: Normal Variation, Traditional System | 11 squares: d1, e1, f1, g1, h1, e2, c4, c5 … |
| E54 | Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation | 11 squares: b1, d1, e2, c3, b4, a6, a7, e8 … |
| A31 | English Opening: Symmetrical Variation, Anti-Benoni Variation | 13 squares: d1, e1, f1, g1, h1, e2, e3, c4 … |
| D05 | Queen’s Pawn Game: Colle System | 13 squares: d1, e1, f1, g1, h1, c2, e2, c4 … |
| D25 | Queen’s Gambit Accepted: Normal Variation | 13 squares: d1, e1, f1, g1, h1, e2, c4, c5 … |
| D40 | Queen’s Gambit Declined: Semi-Tarrasch Defense | 13 squares: b1, d1, e1, f1, g1, h1, e2, c3 … |
| D41 | Queen’s Gambit Declined: Semi-Tarrasch Defense | 13 squares: b1, d1, e1, f1, g1, h1, e2, c3 … |
Where lines continue from here
Three named lines filed under other codes pass through the position after 7.Qe2. All of them belong to the codes listed above.