B52 Sicilian Defense: Moscow Variation, Main Line
B52 holds three named lines, all under the name Sicilian Defense. It leaves B51 (Sicilian Defense: Moscow Variation) with 3...Bd7. That final move, by the bishop, attacks the bishop on b5. Of all other reference positions, the board of B50 (Modern Variations) comes closest, four squares apart.
| # | White | Black |
|---|---|---|
| 1 | e4 | c5 |
| 2 | Nf3 | d6 |
| 3 | Bb5+ | Bd7 |
Lines filed under B52
All three share their first six plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Sicilian Defense: Moscow Variation, Main Line | (the shared start itself) | 6 | |
| Sicilian Defense: Moscow Variation, Sokolsky Variation | 4.Bxd7+ Qxd7 5.c4 | 9 | |
| Sicilian Defense: Moscow Variation, Haag Gambit | 4.Bxd7+ Qxd7 5.O-O Nc6 6.c3 Nf6 7.d4 | 13 | White castled |
Sicilian Defense: Moscow Variation, Sokolsky Variation
- 4.Bxd7+ The bishop on b5 takes the bishop on d7, giving check.
- 4...Qxd7 The queen on d8 takes the bishop on d7, guarding the pawn on b7.
- 5.c4 The c-pawn advances two squares to c4, covering b5 and d5, opening a line for the queen on d1.
Sicilian Defense: Moscow Variation, Haag Gambit
- 4.Bxd7+ The bishop on b5 takes the bishop on d7, giving check.
- 4...Qxd7 The queen on d8 takes the bishop on d7, guarding the pawn on b7.
- 5.O-O White castles kingside, opening a line for the queen on d1, guarding the pawn on g2.
- 5...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8.
- 6.c3 The c-pawn advances to c3, covering b4 and d4, opening a line for the queen on d1.
The road to B52
- 1.e4 … 2.Nf3three earlier stops: B00, B20, B27
- 2...d6B50 Modern Variations
- 3.Bb5+B51 Moscow Variation
- 3...Bd7B52
The position after 3...Bd7
White has brought out the knight on f3 and bishop on b5; Black the bishop on d7. White could capture with Bxd7+. White is to move and has 34 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| B27 | Sicilian Defense | five squares: f1, b5, d6, d7, c8 |
| B20 | Sicilian Defense | seven squares: f1, g1, f3, b5, d6, d7, c8 |
| B28 | Sicilian Defense: O’Kelly Variation | seven squares: f1, b5, a6, d6, a7, d7, c8 |
| B29 | Sicilian Defense: Nimzowitsch Variation | seven squares: f1, b5, d6, f6, d7, c8, g8 |
| B30 | Sicilian Defense: Old Sicilian | seven squares: f1, b5, c6, d6, d7, b8, c8 |
| B31 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | seven squares: c6, d6, g6, d7, g7, b8, c8 |
| B40 | Sicilian Defense: French Variation | seven squares: f1, b5, d6, e6, d7, e7, c8 |