Flank openings

English Opening

1.c4

The English Opening starts with 1.c4 and is catalogued under ECO A10, in the flank openings half of the book. The catalog indexes 175 lines inside it, grouped into 127 named variations.

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Current setup

Move ideas

  1. 1.c4

    Controls d5 from the flank without occupying the center immediately.

    Idea: Pressure the center from the side and keep the pawn structure flexible.

  2. 1e5

    Advances to e5 to claim central space and control nearby key squares.

    Idea: Give the pieces room to develop behind a durable central foothold.

  3. 2.Nc3

    Develops the knight to c3, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  4. 2Nf6

    Develops the knight to f6, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  5. 3.Nf3

    Develops the knight to f3, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  6. 3Nc6

    Develops the knight to c6, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  7. 4.e3

    Advances to e3 to claim central space and control nearby key squares.

    Idea: Give the pieces room to develop behind a durable central foothold.

  8. 4Bb4

    Develops the bishop to b4, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  9. 5.Qc2

    Repositions the queen to c2, where it influences a new part of the board.

    Idea: Coordinate threats carefully while avoiding unnecessary tempi against the queen.

  10. 5Bxc3

    Captures the knight on c3 and changes the local pawn or piece balance.

    Idea: Remove an active defender and improve the moving piece’s influence.

Book continuations

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0 moves
This is the end of the indexed line.

Named variations

Each line below is an indexed entry under English Opening. Open one to load it on the board and keep exploring from that position.

103 more named lines sit inside this family — the tree above walks all of them.

ECO groups openings by the structures they lead to, so these families tend to share plans with the English Opening.