A11 English Opening: Caro-Kann Defensive System
Also filed here: Réti Opening.
A11 holds 12 named lines from two openings, most of them (11) under Réti Opening. It leaves A10 (English Opening) with 1...c6. Lines filed under A14 and D45 reach one of its named positions by a different move order. With 12 named lines it is the fifth-largest code of the 29 English Opening codes.
| # | White | Black |
|---|---|---|
| 1 | c4 | c6 |
Moves only A11 plays
Same as A10 up to 1.c4, then:
- 1...c6 The c-pawn advances to c6, covering b5 and d5, opening a line for the queen on d8.
Lines filed under A11
They begin with two different first moves.
| Name | After the shared start | Plies | At the end |
|---|---|---|---|
| English Opening: Caro-Kann Defensive System | 1.c4 c6 | 2 | |
| Réti Opening: Anglo-Slav Variation, Gurevich System | 1.c4 c6 2.Nf3 d5 3.e3 | 5 | |
| Réti Opening: Anglo-Slav Variation, Gurevich System | 1.c4 c6 2.Nf3 d5 3.e3 Nf6 4.Qc2 | 7 | |
| Réti Opening: Anglo-Slav Variation, with g3 | 1.c4 c6 2.Nf3 d5 3.g3 Nf6 4.Bg2 | 7 | |
| Réti Opening: Anglo-Slav Variation, with g3 | 1.c4 c6 2.Nf3 d5 3.g3 Nf6 4.b3 g6 | 8 | |
| Réti Opening: Anglo-Slav Variation, with g3 | 1.c4 c6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4 | 8 | Black +1 |
| Réti Opening: Anglo-Slav Variation, with g3 | 1.c4 c6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Bf5 | 8 | |
| Réti Opening: Anglo-Slav Variation, Gurevich System | 1.c4 c6 2.Nf3 d5 3.e3 Nf6 4.Nc3 Nbd7 5.Qc2 | 9 | |
| Réti Opening: Anglo-Slav Variation, Gurevich System | 1.c4 c6 2.Nf3 d5 3.e3 Nf6 4.Nc3 Nbd7 5.b3 e5 | 10 | |
| Réti Opening: Anglo-Slav Variation, Gurevich System | 1.c4 c6 2.Nf3 d5 3.e3 Nf6 4.Nc3 e6 5.b3 Bd6 | 10 | |
| Réti Opening: Anglo-Slav Variation, with g3 | 1.c4 c6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Bf5 5.O-O e6 6.d3 | 11 | White castled |
| Réti Opening: Anglo-Slav Variation, with g3 | 1.Nf3 Nf6 2.g3 d5 3.Bg2 c6 4.O-O Bf5 5.d3 h6 6.c4 e6 | 12 | White castled |
The road to A11
- 1.c4A10 English Opening
- 1...c6A11
The position after 1...c6
White is to move and has 22 legal moves.
Closest boards in other codes
| Code | Line | Differs on |
|---|---|---|
| A30 | English Opening: Symmetrical Variation | two squares: c5, c6 |
| A13 | English Opening: Agincourt Defense | four squares: c6, e6, c7, e7 |
| A15 | English Opening: Anglo-Indian Defense | four squares: c6, f6, c7, g8 |
| A20 | English Opening: King’s English Variation | four squares: e5, c6, c7, e7 |
| A34 | English Opening: Symmetrical Variation, Normal Variation | four squares: b1, c3, c5, c6 |
| B10 | Caro-Kann Defense | four squares: c2, e2, c4, e4 |
| D10 | Slav Defense | four squares: d2, d4, d5, d7 |
Other move orders
- Réti Opening: Anglo-Slav Variation, Gurevich System is also reached inside D45 Semi-Slav Defense: Normal Variation, whose order is 1.Nf3 d5 2.e3 Nf6 3.c4 c6 4.Nc3 e6 5.b3 Bd6.
- Réti Opening: Anglo-Slav Variation, with g3 is also reached inside A14 Réti Opening: Anglo-Slav Variation, whose order is 1.Nf3 d5 2.c4 c6 3.g3 Nf6 4.Bg2.