B47 Sicilian Defense: Taimanov Variation, Bastrikov Variation
B47 holds two named lines, all under the name Sicilian Defense. It leaves B45 (Sicilian Defense: Taimanov Variation) with 5...Qc7. Of all other reference positions, the board of B48 (Taimanov Variation, Bastrikov Variation, English Attack) comes closest, two squares apart. When it ends, White has two minor pieces out and Black one, and neither king has castled.
| # | White | Black |
|---|---|---|
| 1 | e4 | c5 |
| 2 | Nf3 | e6 |
| 3 | d4 | cxd4 |
| 4 | Nxd4 | Nc6 |
| 5 | Nc3 | Qc7 |
The move that completes B47
The reference line of B48 plays all of these moves and continues beyond them; B47 is the position reached at 5...Qc7.
- 5...Qc7 The queen goes from d8 to c7.
Lines filed under B47
Both share their first ten plies, the whole reference line.
| Name | After the shared start | Plies |
|---|---|---|
| Sicilian Defense: Taimanov Variation, Bastrikov Variation | (the shared start itself) | 10 |
| Sicilian Defense: Taimanov Variation, Bastrikov Variation, Ponomariov Gambit | 6.Ndb5 Qb8 7.Be3 a6 8.Bb6 | 15 |
Sicilian Defense: Taimanov Variation, Bastrikov Variation, Ponomariov Gambit
- 6.Ndb5 The knight goes from d4 to b5, opening a line for the queen on d1, attacking the queen on c7.
- 6...Qb8 The queen goes from c7 to b8, guarding the rook on a8.
- 7.Be3 The bishop leaves c1 for e3, opening a line for the rook on a1 and the queen on d1.
- 7...a6 The a-pawn advances to a6, covering b5, opening a line for the rook on a8, attacking the knight on b5.
- 8.Bb6 The bishop goes from e3 to b6.
The road to B47
- 1.e4 … 4.Nxd4five earlier stops: B00, B20, B27, B40
- 4...Nc6B44 Taimanov Variation
- 5.Nc3B45 Taimanov Variation
- 5...Qc7B47
The position after 5...Qc7
White has brought out the knight on c3 and knight on d4; Black the knight on c6. White has a half-open d-file; Black a half-open c-file. White could capture with Nxc6, Nxe6. White is to move and has 43 legal moves.
Codes that branch off from B47
The reference lines of one other code leave B47 from the position after 5...Qc7, each with its own moves.
| Code | Moves | Reference line |
|---|---|---|
| B48 | 6.Be3 | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack |
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| B44 | Sicilian Defense: Taimanov Variation | four squares: b1, c3, c7, d8 |
| B46 | Sicilian Defense: Taimanov Variation | four squares: a6, a7, c7, d8 |
| C45 | Scotch Game | five squares: b1, c3, e6, c7, d8 |
| B43 | Sicilian Defense: Kan Variation, Knight Variation | six squares: a6, c6, a7, c7, b8, d8 |
| B49 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | six squares: c1, f1, e2, e3, a6, a7 |
| C46 | Three Knights Opening | seven squares: d2, f3, d4, e5, e6, c7, d8 |
| A33 | English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense | eight squares: c2, e2, c4, e4, f6, c7, d8, g8 |
Where lines continue from here
Five named lines filed under other codes pass through the position after 5...Qc7. Besides the codes above, they belong to B49, B85.