B57 Sicilian Defense: Classical Variation, Sozin Attack
B57 holds three named lines, all under the name Sicilian Defense. It leaves B56 (Sicilian Defense: Classical Variation) with 6.Bc4. That final move, by the bishop, opens a line for the rook on h1. Of all other reference positions, the board of B58 (Classical Variation) comes closest, two squares apart.
| # | White | Black |
|---|---|---|
| 1 | e4 | c5 |
| 2 | Nf3 | d6 |
| 3 | d4 | cxd4 |
| 4 | Nxd4 | Nf6 |
| 5 | Nc3 | Nc6 |
| 6 | Bc4 |
Lines filed under B57
All three share the start 1.e4 c5 2.Nf3 and then split two ways at Black’s move 2.
| Name | After the shared start | Plies |
|---|---|---|
| Sicilian Defense: Classical Variation, Sozin Attack | 2...d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 | 11 |
| Sicilian Defense: Classical Variation, Anti-Sozin Variation | 2...Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 Qb6 | 12 |
| Sicilian Defense: Magnus Smith Trap | 2...Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 g6 7.Nxc6 bxc6 8.e5 | 15 |
Sicilian Defense: Classical Variation, Anti-Sozin Variation
- 2...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8.
- 3.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.
- 3...cxd4 The c-pawn takes the pawn on d4, covering c3 and e3.
- 4.Nxd4 The knight on f3 takes the pawn on d4, opening a line for the queen on d1, attacking the knight on c6.
- 4...Nf6 The knight leaves g8 for f6, opening a line for the rook on h8.
Sicilian Defense: Magnus Smith Trap
- 2...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8.
- 3.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.
- 3...cxd4 The c-pawn takes the pawn on d4, covering c3 and e3.
- 4.Nxd4 The knight on f3 takes the pawn on d4, opening a line for the queen on d1, attacking the knight on c6.
- 4...Nf6 The knight leaves g8 for f6, opening a line for the rook on h8.
The road to B57
- 1.e4 … 4.Nxd4six earlier stops: B00, B20, B27, B50
- 4...Nf6B54 Main Line
- 5...Nc6B56 Classical Variation
- 6.Bc4B57
The position after 6.Bc4
White has brought out the knight on c3, knight on d4 and bishop on c4; Black the knight on c6 and knight on f6. White has a half-open d-file; Black a half-open c-file. Black could capture with Nxd4, Nxe4. Black is to move and has 34 legal moves.
Codes that branch off from B57
The reference lines of one other code leave B57 from the position after 6.Bc4, each with its own moves.
| Code | Moves | Reference line |
|---|---|---|
| B88 | 6...e6 | Sicilian Defense: Sozin Attack, Leonhardt Variation |
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| B60 | Sicilian Defense: Richter-Rauzer Variation | four squares: c1, f1, c4, g5 |
| B86 | Sicilian Defense: Sozin Attack | four squares: c6, e6, e7, b8 |
| B89 | Sicilian Defense: Sozin Attack, Main Line | four squares: c1, e3, e6, e7 |
| B33 | Sicilian Defense: Open | six squares: b1, f1, c3, c4, d6, d7 |
| B59 | Sicilian Defense: Boleslavsky Variation | six squares: e2, b3, c4, d4, e5, e7 |
| B62 | Sicilian Defense: Richter-Rauzer Variation | six squares: c1, f1, c4, g5, e6, e7 |
| B70 | Sicilian Defense: Dragon Variation | six squares: f1, c4, c6, g6, g7, b8 |
Where lines continue from here
Five named lines filed under other codes pass through the position after 6.Bc4. Besides the codes above, they belong to B89.