B54 Sicilian Defense: Dragon Variation, Accelerated Dragon
B54 holds four named lines, all under the name Sicilian Defense. It leaves B50 (Sicilian Defense) with 4.Nxd4 g6. That final move, by the g-pawn, covers f5 and h5 and opens a line for the bishop on f8. Of all other reference positions, the board of B70 (Dragon Variation) comes closest, four squares apart.
| # | White | Black |
|---|---|---|
| 1 | e4 | c5 |
| 2 | Nf3 | d6 |
| 3 | d4 | cxd4 |
| 4 | Nxd4 | g6 |
Lines filed under B54
All four share the start 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 and then split two ways at Black’s move 4.
| Name | After the shared start | Plies |
|---|---|---|
| Sicilian Defense: Dragon Variation, Accelerated Dragon | 4...g6 | 8 |
| Sicilian Defense: Modern Variations, Main Line | 4...Nf6 | 8 |
| Sicilian Defense: Modern Variations, Ginsberg Gambit | 4...Nf6 5.Bc4 | 9 |
| Sicilian Defense: Prins Variation | 4...Nf6 5.f3 | 9 |
Sicilian Defense: Modern Variations, Main Line
- 4...Nf6 The knight leaves g8 for f6, opening a line for the rook on h8.
Sicilian Defense: Modern Variations, Ginsberg Gambit
- 4...Nf6 The knight leaves g8 for f6, opening a line for the rook on h8.
- 5.Bc4 The bishop leaves f1 for c4, opening a line for the rook on h1.
Sicilian Defense: Prins Variation
- 4...Nf6 The knight leaves g8 for f6, opening a line for the rook on h8.
- 5.f3 The f-pawn advances to f3, covering e4 and g4.
The road to B54
- 1.e4 … 2...d6four earlier stops: B00, B20, B27, B50
- 3.d4B50 Sicilian Defense
- 3...cxd4B50 Sicilian Defense
- 4...g6B54
The position after 4...g6
White has brought out the knight on d4; Black has not yet moved a knight or bishop. White has a half-open d-file; Black a half-open c-file. White is to move and has 42 legal moves.
Codes that branch off from B54
The reference lines of four other codes leave B54 from two of its named positions; “From” gives the last part of that position’s name.
| Code | From | Moves | Reference line |
|---|---|---|---|
| B55 | Prins Variation | 5...e5 6.Bb5+ | Sicilian Defense: Prins Variation, Venice Attack |
| B56 | Main Line | 5.Nc3 Nc6 | Sicilian Defense: Classical Variation |
| B70 | Main Line | 5.Nc3 g6 | Sicilian Defense: Dragon Variation |
| B90 | Main Line | 5.Nc3 a6 | Sicilian Defense: Najdorf Variation |
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| B34 | Sicilian Defense: Accelerated Dragon, Exchange Variation | five squares: d4, c6, d6, d7, b8 |
| B53 | Sicilian Defense: Chekhover Variation | five squares: d1, f3, d4, g6, g7 |
| B06 | Modern Defense | six squares: g1, d2, d4, d6, c7, d7 |
| B36 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | six squares: c2, c4, c6, d6, d7, b8 |
| B71 | Sicilian Defense: Dragon Variation, Levenfish Variation | six squares: b1, f2, c3, f4, f6, g8 |
| B72 | Sicilian Defense: Dragon Variation | six squares: b1, c1, c3, e3, f6, g8 |
| A41 | Queen’s Pawn Game | seven squares: g1, e2, d4, e4, g6, c7, g7 |