B13 Caro-Kann Defense: Exchange Variation
B13 holds 15 named lines, all under the name Caro-Kann Defense. It leaves B12 (Caro-Kann Defense) with 3.exd5. When the reference line ends, White is one pawn up on material. No other Caro-Kann Defense code shares this. With 15 named lines it is the third-largest code of the 10 Caro-Kann Defense codes. Black’s pieces and pawns attack two squares in White’s half, the fourth-lowest count of the 10 Caro-Kann Defense codes.
| # | White | Black |
|---|---|---|
| 1 | e4 | c6 |
| 2 | d4 | d5 |
| 3 | exd5 |
The move that completes B13
The reference line of B14 plays all of these moves and continues beyond them; B13 is the position reached at 3.exd5.
- 3.exd5 The e-pawn takes the pawn on d5, covering c6 and e6.
Lines filed under B13
All 15 share their first five plies, the whole reference line.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| Caro-Kann Defense: Exchange Variation | (the shared start itself) | 5 | White +1 |
| Caro-Kann Defense: Exchange Variation | 3...cxd5 | 6 | |
| Caro-Kann Defense: Exchange Variation | 3...cxd5 4.Bf4 | 7 | |
| Caro-Kann Defense: Exchange Variation, Bulla Attack | 3...cxd5 4.g4 | 7 | |
| Caro-Kann Defense: Panov Attack | 3...cxd5 4.c4 | 7 | |
| Caro-Kann Defense: Exchange Variation | 3...cxd5 4.Nf3 Nc6 | 8 | |
| Caro-Kann Defense: Panov Attack | 3...cxd5 4.c4 Nf6 5.Nc3 | 9 | |
| Caro-Kann Defense: Panov Attack, Gunderam Attack | 3...cxd5 4.c4 Nf6 5.c5 | 9 | |
| Caro-Kann Defense: Panov Attack, Modern Defense | 3...cxd5 4.c4 Nf6 5.Nc3 Nc6 | 10 | |
| Caro-Kann Defense: Exchange Variation, Rubinstein Variation | 3...cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 | 11 | |
| Caro-Kann Defense: Panov Attack, Modern Defense, Carlsbad Line | 3...cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6 | 12 | |
| Caro-Kann Defense: Panov Attack, Modern Defense, Czerniak Line | 3...cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qa5 | 12 | |
| Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line | 3...cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Nf3 Bg4 | 12 | |
| Caro-Kann Defense: Panov Attack, Modern Defense, Reifir-Spielmann Line | 3...cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qb6 | 12 | |
| Caro-Kann Defense: Panov-Botvinnik, Herzog Defense | 3...cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 dxc4 7.d5 Na5 | 14 | Black +1 |
The road to B13
- 1.e4 … 1...c6two earlier stops: B00, B10
- 2.d4B12 Caro-Kann Defense
- 2...d5B12 Caro-Kann Defense
- 3.exd5B13
The position after 3.exd5
White has a half-open e-file; Black a half-open d-file. Black could capture with Qxd5, cxd5. Undefended and attacked: the pawn on d5. Black is to move and has 30 legal moves.
Codes that branch off from B13
The reference lines of one other code leave B13 from the position after 5.Nc3, each with its own moves.
| Code | Moves | Reference line |
|---|---|---|
| B14 | 5...e6 | Caro-Kann Defense: Panov Attack |
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| B15 | Caro-Kann Defense | four squares: b1, c3, e4, d5 |
| C01 | French Defense: Exchange Variation | four squares: c6, e6, c7, e7 |
| D00 | Queen’s Pawn Game | four squares: e2, d5, c6, c7 |
| D10 | Slav Defense | four squares: c2, e2, c4, d5 |
| A40 | Queen’s Pawn Game | five squares: e2, d5, c6, c7, d7 |
| A41 | Queen’s Pawn Game | five squares: e2, d5, c6, d6, c7 |
| A43 | Benoni Defense: Old Benoni | five squares: e2, c5, d5, c6, d7 |
Where lines continue from here
Seven named lines filed under other codes pass through the position after 3.exd5. All of them belong to the codes listed above.
Other move orders
- Caro-Kann Defense: Panov Attack, Modern Defense is also reached inside B14 Caro-Kann Defense: Panov Attack, whose order is 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nc6 5.Nc3 Nf6.