Library/Openings/King's Gambit Declined/Petrov's Defense ECO C30
Opening· 4 plies

King's Gambit Declined: Petrov's Defense

An entry in the Encyclopedia of Chess Openings (ECO C30), reached after 4 half-moves: 1. e4 e5 2. f4 Nf6.

King's Gambit Declined: Petrov's Defense ECO C30
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Black rook
Black knight
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 pawn
White pawn
White pawn
White pawn
White pawn
White pawn
White pawn
White pawn
White pawn
White rook
White knight
White bishop
White queen
White king
White bishop
White knight
White rook
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End of this line

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About this opening

King's Gambit Declined: Petrov's Defense is an opening in the Encyclopedia of Chess Openings, classified under code C30. 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 4 half-moves from the starting position, with the move sequence 1. e4 e5 2. f4 Nf6.

The opening sequence in prose form: 1.e4 e5, 2.f4 Nf6. 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.