B78 Sicilian Defense: Dragon Variation, Yugoslav Attack
B78 holds four named lines, all under the name Sicilian Defense. It leaves B77 (Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line) with 10.O-O-O. At 19 plies, its reference line is the third-longest of the 80 Sicilian Defense codes. Queenside castling appears in four of its lines, first in Sicilian Defense: Dragon Variation, Yugoslav Attack. Its deepest line, Sicilian Defense: Dragon Variation, Yugoslav Attack, Topalov Variation, runs to 12.Bxd4, the third-longest of the 80 Sicilian Defense codes.
| # | White | Black |
|---|---|---|
| 1 | e4 | c5 |
| 2 | Nf3 | d6 |
| 3 | d4 | cxd4 |
| 4 | Nxd4 | Nf6 |
| 5 | Nc3 | g6 |
| 6 | Be3 | Bg7 |
| 7 | f3 | O-O |
| 8 | Qd2 | Nc6 |
| 9 | Bc4 | Bd7 |
| 10 | O-O-O |
Moves only B78 plays
Same as B79 up to 9...Bd7, then:
- 10.O-O-O White castles queenside, opening a line for the rook on h1, guarding the pawn on b2.
Lines filed under B78
All four share their first 19 plies, the whole reference line and then split two ways at Black’s move 10.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Sicilian Defense: Dragon Variation, Yugoslav Attack | (the shared start itself) | 19 | both castled |
| Sicilian Defense: Dragon Variation, Yugoslav Attack, Chinese Dragon | 10...Rb8 | 20 | both castled |
| Sicilian Defense: Dragon Variation, Yugoslav Attack, Old Line | 10...Rc8 | 20 | both castled |
| Sicilian Defense: Dragon Variation, Yugoslav Attack, Topalov Variation | 10...Rc8 11.Bb3 Nxd4 12.Bxd4 | 23 | both castled |
Sicilian Defense: Dragon Variation, Yugoslav Attack, Chinese Dragon
- 10...Rb8 The rook goes from a8 to b8, guarding the pawn on b7.
Sicilian Defense: Dragon Variation, Yugoslav Attack, Old Line
- 10...Rc8 The rook goes from a8 to c8.
Sicilian Defense: Dragon Variation, Yugoslav Attack, Topalov Variation
- 10...Rc8 The rook goes from a8 to c8.
- 11.Bb3 The bishop goes from c4 to b3, pinning the pawn on f7 to its king.
- 11...Nxd4 The knight on c6 takes the knight on d4, opening a line for the bishop on d7 and the rook on c8, attacking the bishop on b3.
- 12.Bxd4 The bishop on e3 takes the knight on d4, opening a line for the queen on d2, attacking the knight on f6.
The road to B78
The position after 10.O-O-O
White has brought out the knight on c3, knight on d4, bishop on c4 and bishop on e3; Black the knight on c6, knight on f6, bishop on d7 and bishop on g7. 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 38 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| B76 | Sicilian Defense: Dragon Variation, Yugoslav Attack | 11 squares: a1, c1, d1, e1, f1, d2, c4, c6 … |
| B64 | Sicilian Defense: Richter-Rauzer Variation, Classical Variation | 12 squares: f1, e3, f3, c4, f4, g5, e6, g6 … |
| E79 | King’s Indian Defense: Four Pawns Attack, Exchange Variation | 12 squares: a1, c1, d1, e1, c2, d2, e2, f3 … |
| E83 | King’s Indian Defense: Sämisch Variation, Yates Defense | 13 squares: a1, c1, d1, e1, f1, g1, c2, d2 … |
| B35 | Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation | 14 squares: a1, c1, d1, e1, d2, f2, f3, d6 … |
| B65 | Sicilian Defense: Richter-Rauzer Variation, Rauzer Attack | 14 squares: f1, e3, f3, c4, d4, f4, g5, c6 … |
| B74 | Sicilian Defense: Dragon Variation, Classical Variation, Normal Line | 15 squares: a1, c1, d1, f1, g1, h1, d2, e2 … |
Where lines continue from here
One named line filed under other codes passes through the position after 10.O-O-O. It belongs to B79.