Open games & French

King's Knight Opening

1.e4 e5 2.Nf3

The King's Knight Opening starts with 1.e4 e5 2.Nf3 and is catalogued under ECO C40, in the open games & french half of the book. The catalog indexes 3 lines inside it, grouped into 3 named variations.

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Current setup

Move ideas

  1. 1.e4

    Claims the center with a pawn and opens lines for the queen and king’s bishop.

    Idea: Build quick development and make early castling possible.

  2. 1e5

    Meets White’s center directly and opens lines for Black’s queen and bishop.

    Idea: Fight for equal central space in a balanced, open position.

  3. 2.Nf3

    Develops the king’s knight and attacks Black’s e5-pawn.

    Idea: Increase central pressure while getting ready to castle.

  4. 2Nc6

    Defends e5 while developing the queen’s knight toward the center.

    Idea: Hold the central pawn and keep several classical setups available.

  5. 3.Bc4

    Develops the bishop onto an active diagonal aimed at f7.

    Idea: Accelerate kingside development and make Black’s weakest early square a target.

  6. 3Bc5

    Develops the bishop to c5, bringing it into the game.

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

  7. 4.b4

    Advances the b-pawn to gain queenside space and control new squares.

    Idea: Prepare a fianchetto or discourage the opponent’s expansion on that wing.

  8. 4Bb6

    Repositions the bishop to b6, where it influences a new part of the board.

    Idea: Improve the piece’s activity and support the next stage of the plan.

  9. 5.b5

    Advances the b-pawn to gain queenside space and control new squares.

    Idea: Create useful wing space while keeping the central structure flexible.

  10. 5Na5

    Repositions the knight to a5, where it influences a new part of the board.

    Idea: Improve the piece’s activity and support the next stage of the plan.

  11. 6.Nxe5

    Captures the pawn on e5 and changes the local pawn or piece balance.

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

  12. 6Nh6

    Develops the knight to h6, bringing it into the game.

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

  13. 7.d4

    Advances to d4 to claim central space and control nearby key squares.

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

  14. 7d6

    Advances to d6 to claim central space and control nearby key squares.

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

  15. 8.Bxh6

    Captures the knight on h6 and changes the local pawn or piece balance.

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

  16. 8dxe5

    Captures the knight on e5 and changes the local pawn or piece balance.

    Idea: Open lines in the center and reshape the center for the next phase.

  17. 9.Bxg7

    Captures the pawn on g7 and changes the local pawn or piece balance.

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

  18. 9Rg8

    Repositions the rook to g8, where it influences a new part of the board.

    Idea: Improve the piece’s activity and support the next stage of the plan.

  19. 10.Bxf7+

    Captures the pawn on f7 and changes the local pawn or piece balance, forcing the king to answer a check.

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

  20. 10Kxf7

    Captures the bishop on f7 and changes the local pawn or piece balance.

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

  21. 11.Bxe5

    Captures the pawn on e5 and changes the local pawn or piece balance.

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

  22. 11Qg5

    Repositions the queen to g5, where it influences a new part of the board.

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

  23. 12.Nd2

    Develops the knight to d2, bringing it into the game.

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

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 King's Knight Opening. Open one to load it on the board and keep exploring from that position.

ECO groups openings by the structures they lead to, so these families tend to share plans with the King's Knight Opening.