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.Bb5

    Develops the bishop and pressures the knight that helps defend e5.

    Idea: Create long-term pressure on Black’s center before deciding whether to exchange.

  6. 3a6

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

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

  7. 4.Ba4

    Repositions the bishop to a4, where it influences a new part of the board.

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

  8. 4Nf6

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

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

  9. 5.O-O

    Tucks the king away and activates the rook in a single move.

    Idea: Finish kingside development so the central pieces can coordinate safely.

  10. 5Be7

    Develops the bishop to e7, bringing it into the game.

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

  11. 6.Re1

    Repositions the rook to e1, where it influences a new part of the board.

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

  12. 6b5

    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.

  13. 7.Bb3

    Repositions the bishop to b3, where it influences a new part of the board.

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

  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.c3

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

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

  16. 8O-O

    Tucks the king away and activates the rook in a single move.

    Idea: Finish kingside development so the central pieces can coordinate safely.

  17. 9.h3

    Advances the h-pawn to gain kingside edge space and control new squares.

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

  18. 9Na5

    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.

  19. 10.Bc2

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

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

  20. 10c5

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

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

  21. 11.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.

  22. 11Nc6

    Repositions the knight to c6, where it influences a new part of the board.

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

Book continuations

Waiting for Lichess game popularity.

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.