A33 English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense
A33 holds two named lines, all under the name English Opening. It leaves A13 (English Opening: Agincourt Defense) with 2...Nf6 3.Nc3 c5 4.d4 cxd4 5.Nxd4 Nc6. Two captures are made along the reference line, level for the most of the 29 English Opening codes. White, to move in that position, has 38 legal moves, level for the most of the 29 English Opening codes. White’s pieces and pawns attack seven squares in Black’s half, level for the most of the 29 English Opening codes.
| # | White | Black |
|---|---|---|
| 1 | c4 | e6 |
| 2 | Nf3 | Nf6 |
| 3 | Nc3 | c5 |
| 4 | d4 | cxd4 |
| 5 | Nxd4 | Nc6 |
Moves only A33 plays
Same as A14 up to 2.Nf3, then:
- 2...Nf6 The knight leaves g8 for f6, opening a line for the rook on h8.
- 3.Nc3 The knight leaves b1 for c3, opening a line for the rook on a1.
- 3...c5 The c-pawn advances two squares to c5, covering b4 and d4, opening a line for the queen on d8.
- 4.d4 The d-pawn advances two squares to d4, covering c5 and e5, opening a line for the bishop on c1 and the queen on d1.
- 4...cxd4 The c-pawn takes the pawn on d4, covering c3 and e3, opening a line for the bishop on f8, attacking the knight on c3.
- 5.Nxd4 The knight on f3 takes the pawn on d4.
- 5...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8, attacking the knight on d4.
Lines filed under A33
Both share the start 1.c4 e6 2.Nf3 Nf6 3.Nc3 c5 4.d4 and then split two ways at Black’s move 4.
| Name | After the shared start | Plies |
|---|---|---|
| English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense | 4...cxd4 5.Nxd4 Nc6 | 10 |
| English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation | 4...Nc6 5.g3 cxd4 6.Nxd4 Qb6 | 12 |
English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation
- 4...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8.
- 5.g3 The g-pawn advances to g3, covering f4 and h4, opening a line for the bishop on f1.
- 5...cxd4 The c-pawn takes the pawn on d4, covering c3 and e3, opening a line for the bishop on f8, attacking the knight on c3.
- 6.Nxd4 The knight on f3 takes the pawn on d4, attacking the knight on c6.
- 6...Qb6 The queen goes from d8 to b6, attacking the knight on d4.
The road to A33
- 1.c4one earlier stop: A10
- 1...e6A13 Agincourt Defense
- 2.Nf3A13 Agincourt Defense
- 5...Nc6A33
The position after 5...Nc6
White has brought out the knight on c3 and knight on d4; Black the knight on c6 and knight on f6. White has a half-open d-file; Black a half-open c-file. White could capture with Nxc6, Nxe6.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| A32 | English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense | four squares: b1, c3, c6, b8 |
| A17 | English Opening: Anglo-Indian Defense, Hedgehog System | six squares: g1, d2, d4, c6, c7, b8 |
| A28 | English Opening: King’s English Variation, Four Knights Variation | six squares: d2, f3, d4, e5, e6, c7 |
| B45 | Sicilian Defense: Taimanov Variation | six squares: c2, e2, c4, e4, f6, g8 |
| D43 | Semi-Slav Defense | six squares: f3, d4, d5, c6, d7, b8 |
| B14 | Caro-Kann Defense: Panov Attack | seven squares: g1, e2, d4, d5, c6, d7, b8 |
| B88 | Sicilian Defense: Sozin Attack, Leonhardt Variation | seven squares: f1, c2, e2, c4, e4, d6, d7 |