D21 Queen’s Gambit Accepted: Normal Variation
D21 holds six named lines, all under the name Queen’s Gambit. It leaves D20 (Queen’s Gambit Accepted) with 3.Nf3. When the reference line ends, Black is one pawn up on material. That final move, by the knight, opens a line for the rook on h1.
| # | White | Black |
|---|---|---|
| 1 | d4 | d5 |
| 2 | c4 | dxc4 |
| 3 | Nf3 |
Lines filed under D21
All six share their first five plies, the whole reference line and then split five ways at Black’s move 3.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Queen’s Gambit Accepted: Normal Variation | (the shared start itself) | 5 | Black +1 |
| Queen’s Gambit Accepted: Godes Variation | 3...Nd7 | 6 | Black +1 |
| Queen’s Gambit Accepted: Gunsberg Defense | 3...c5 | 6 | Black +1 |
| Queen’s Gambit Accepted: Rosenthal Variation | 3...e6 | 6 | Black +1 |
| Queen’s Gambit Accepted: Slav Gambit | 3...b5 | 6 | Black +1 |
| Queen’s Gambit Accepted: Alekhine Defense, Borisenko-Furman Variation | 3...a6 4.e4 | 7 | Black +1 |
The road to D21
- 1.d4 … 1...d5two earlier stops: A40, D00
- 2.c4D06 Queen’s Gambit
- 2...dxc4D20 Queen’s Gambit Accepted
- 3.Nf3D21
The position after 3.Nf3
White has brought out the knight on f3; Black has not yet moved a knight or bishop. White has a half-open c-file; Black a half-open d-file. Black could capture with Qxd4. Black is to move and has 30 legal moves.
Codes that branch off from D21
The reference lines of two other codes leave D21 from the position after 3.Nf3, each with its own moves.
| Code | Moves | Reference line |
|---|---|---|
| D22 | 3...a6 | Queen’s Gambit Accepted: Alekhine Defense |
| D23 | 3...Nf6 | Queen’s Gambit Accepted |
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| D02 | Queen’s Pawn Game: Zukertort Variation | three squares: c2, c4, d5 |
| A09 | Réti Opening | four squares: d2, c4, d4, d5 |
| D06 | Queen’s Gambit | four squares: g1, f3, c4, d5 |
| D11 | Slav Defense: Modern Line | four squares: c4, d5, c6, c7 |
| D24 | Queen’s Gambit Accepted: Showalter Variation | four squares: b1, c3, f6, g8 |
| D25 | Queen’s Gambit Accepted: Normal Variation | four squares: e2, e3, f6, g8 |
| A04 | Zukertort Opening | five squares: c2, d2, c4, d4, d7 |
Where lines continue from here
Thirty-seven named lines filed under other codes pass through the position after 3.Nf3. Besides the codes above, they belong to D24, D25, D26, D27, D28, D29.