Open games & French

Petrov's Defense

1.e4 e5 2.Nf3 Nf6

The Petrov's Defense starts with 1.e4 e5 2.Nf3 Nf6 and is catalogued under ECO C42, in the open games & french half of the book. The catalog indexes 50 lines inside it, grouped into 43 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. 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.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.

  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.Nxc6

    Captures the knight on c6 and changes the local pawn or piece balance.

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

  8. 4dxc6

    Captures the knight on c6 and changes the local pawn or piece balance.

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

  9. 5.d3

    Advances to d3 to claim central space and control nearby key squares.

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

  10. 5Bc5

    Develops the bishop to c5, 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 Petrov's Defense. Open one to load it on the board and keep exploring from that position.

19 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 Petrov's Defense.