B53 Sicilian Defense: Chekhover Variation
B53 holds two named lines, all under the name Sicilian Defense. It leaves B50 (Sicilian Defense) with 4.Qxd4. White’s pieces and pawns attack 13 squares in Black’s half, the second-highest count of the 80 Sicilian Defense codes. That final move, by the queen, guards the pawn on e4.
| # | White | Black |
|---|---|---|
| 1 | e4 | c5 |
| 2 | Nf3 | d6 |
| 3 | d4 | cxd4 |
| 4 | Qxd4 |
Lines filed under B53
Both share their first seven plies, the whole reference line.
| Name | After the shared start | Plies |
|---|---|---|
| Sicilian Defense: Chekhover Variation | (the shared start itself) | 7 |
| Sicilian Defense: Chekhover Variation, Zaitsev Defense | 4...Nc6 5.Bb5 Qd7 | 10 |
Sicilian Defense: Chekhover Variation, Zaitsev Defense
- 4...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8, attacking the queen on d4.
- 5.Bb5 The bishop leaves f1 for b5, opening a line for the rook on h1, attacking the knight on c6, pinning the knight on c6 to its king.
- 5...Qd7 The queen goes from d8 to d7.
The road to B53
- 1.e4 … 2...d6four earlier stops: B00, B20, B27, B50
- 3.d4B50 Sicilian Defense
- 3...cxd4B50 Sicilian Defense
- 4.Qxd4B53
The position after 4.Qxd4
White has brought out the knight on f3; Black has not yet moved a knight or bishop. White has a half-open d-file; Black a half-open c-file. Black is to move and has 28 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| B27 | Sicilian Defense | six squares: d1, d2, d4, c5, d6, d7 |
| B51 | Sicilian Defense: Moscow Variation | six squares: d1, f1, d2, d4, b5, c5 |
| C41 | Philidor Defense | six squares: d1, d2, d4, e5, c7, e7 |
| A41 | Queen’s Pawn Game | seven squares: d1, g1, e2, f3, d4, e4, c7 |
| B04 | Alekhine Defense: Modern Variation | seven squares: d1, d4, e4, d5, e5, c7, g8 |
| B07 | King’s Pawn Game: Maróczy Defense | seven squares: d1, g1, f3, d4, e5, c7, e7 |
| B12 | Caro-Kann Defense | seven squares: d1, g1, f3, d4, c6, d6, d7 |