Library/Openings/Petrov's Defense/Modern Attack/Bardeleben Variation ECO C43
Opening· 12 plies

Petrov's Defense: Modern Attack, Bardeleben Variation

An entry in the Encyclopedia of Chess Openings (ECO C43), reached after 12 half-moves: 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 Nc5 6. Nxd4 Nc6.

Petrov's Defense: Modern Attack, Bardeleben Variation ECO C43
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Black rook
Black bishop
Black queen
Black king
Black bishop
Black rook
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black knight
Black knight
White pawn
White knight
White pawn
White pawn
White pawn
White queen
White pawn
White pawn
White pawn
White rook
White knight
White bishop
White king
White bishop
White rook
12/12
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  5. 3.
  7. 4.
  9. 5.
  11. 6.
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End of this line

No further variations branch from this position in our database. To explore neighbouring ideas:

About this opening

Petrov's Defense: Modern Attack, Bardeleben Variation is an opening in the Encyclopedia of Chess Openings, classified under code C43. ECO group C (C00–C99) covers open games (1.e4 e5) and the French Defence, including the Ruy Lopez, Italian, Scotch and King's Gambit. This particular variation is reached after 12 half-moves from the starting position, with the move sequence 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 Nc5 6. Nxd4 Nc6.

It belongs to the Petrov's Defense family. Within that family this is a level-2 branch (the Modern Attack → Bardeleben Variation line). The immediate parent line is Petrov's Defense: Modern Attack, transitioned via 6…Nc6.

The opening sequence in prose form: 1.e4 e5, 2.Nf3 Nf6, 3.d4 exd4, 4.e5 Ne4, 5.Qe2 Nc5, 6.Nxd4 Nc6. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.