A52 Indian Defense: Budapest Gambit Accepted, Main Line
A52 holds six named lines, all under the name Indian Defense. It leaves A51 (Indian Defense: Budapest Gambit Accepted) with 3...Ng4. When the reference line ends, White is one pawn up on material. No other Indian Defense code shares this. White, to move in that position, has 33 legal moves, the most of the 8 Indian Defense codes. At six plies, its reference line is the longest of the 8 Indian Defense codes.
| # | White | Black |
|---|---|---|
| 1 | d4 | Nf6 |
| 2 | c4 | e5 |
| 3 | dxe5 | Ng4 |
Moves only A52 plays
Same as A51 up to 2...e5, then:
- 3.dxe5 The d-pawn takes the pawn on e5, covering d6 and f6, opening a line for the queen on d1, attacking the knight on f6.
- 3...Ng4 The knight goes from f6 to g4, opening a line for the queen on d8.
Lines filed under A52
All six share their first six plies, the whole reference line and then split three ways at White’s move 4.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Indian Defense: Budapest Gambit Accepted, Main Line | (the shared start itself) | 6 | White +1 |
| Indian Defense: Budapest Gambit Accepted, Main Line, Adler Variation | 4.Nf3 | 7 | White +1 |
| Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation | 4.e4 | 7 | White +1 |
| Indian Defense: Budapest Gambit Accepted, Main Line, Rubinstein Variation | 4.Bf4 | 7 | White +1 |
| Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Abonyi Variation | 4.e4 Nxe5 | 8 | |
| Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Tartakower Defense | 4.e4 d6 | 8 | White +1 |
The road to A52
- 1.d4 … 2.c4three earlier stops: A40, A45, A50
- 2...e5A51 Budapest Gambit
- 3.dxe5A51 Budapest Gambit Accepted
- 3...Ng4A52
The position after 3...Ng4
Black has brought out the knight on g4; White has not yet moved a knight or bishop. White has a half-open d-file; Black a half-open e-file. White could capture with Qxd7+.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| A20 | English Opening: King’s English Variation | four squares: d2, g4, e5, g8 |
| A10 | English Opening | five squares: d2, g4, e5, e7, g8 |
| A13 | English Opening: Agincourt Defense | five squares: d2, g4, e5, e6, g8 |
| A15 | English Opening: Anglo-Indian Defense | five squares: d2, g4, e5, f6, e7 |
| A50 | Indian Defense: Normal Variation | five squares: d4, g4, e5, f6, e7 |
| A21 | English Opening: King’s English Variation, Reversed Sicilian | six squares: b1, d2, c3, g4, e5, g8 |
| A22 | English Opening: King’s English Variation, Two Knights Variation | six squares: b1, d2, c3, g4, e5, f6 |