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, and the position after those moves has 1 playable continuation to walk from here.

Opening repertoire map

Root edges show how often each move is played around your Elo. Use the arrow on a position to reveal the next replies.

Current position
Scotch Game: Haxo Gambit
Popularity by Elo
Share of Lichess blitz, rapid, and classical games that continued with each move.
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h

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.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.

  6. 3exd4

    Captures the pawn on d4 and changes the local pawn or piece balance.

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

  7. 4.Bc4

    Develops the bishop to c4, bringing it into the game.

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

  8. 4Bc5

    Develops the bishop to c5, 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. 5Nf6

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

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

  11. 6.e5

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

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

  12. 6d5

    Advances to d5 to claim central space and control nearby key squares.

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

  13. 7.exf6

    Captures the knight on f6 and changes the local pawn or piece balance.

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

  14. 7dxc4

    Captures the bishop on c4 and changes the local pawn or piece balance.

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

Book continuations

Waiting for Lichess game popularity.

1 move

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.