The Classical, Svenonius Variation is a variation of the King's Gambit Declined, catalogued as ECO C30. The line runs 1. e4 e5 2. Bc4 Nc6 3. Nc3 Nf6 4. d3 Bc5 5. f4 d6 6. Nf3 Bg4 7. h3 Bxf3 8. Qxf3 exf4, reaching the position shown below after 16 half-moves.
White holds the centre with pawns on e4. Development is level at three minor pieces each, and Black is up a pawn of material. It is White to move after eight moves. Black has doubled pawns on the f-file; White has the bishop pair.
On the King's Gambit Declined generally: Black declines the gambit pawn, leading to solid and strategic middlegame positions.
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The Classical, Svenonius Variation goes 1. e4 e5 2. Bc4 Nc6 3. Nc3 Nf6 4. d3 Bc5 5. f4 d6 6. Nf3 Bg4 7. h3 Bxf3 8. Qxf3 exf4. It is a variation of the King's Gambit Declined and is catalogued as ECO C30.
The Classical, Svenonius Variation is ECO C30. ECO codes group openings by their move order, so nearby codes cover closely related lines of the King's Gambit Declined.
Stockfish evaluates the position after 1. e4 e5 2. Bc4 Nc6 3. Nc3 Nf6 4. d3 Bc5 5. f4 d6 6. Nf3 Bg4 7. h3 Bxf3 8. Qxf3 exf4 at -0.06 at depth 18, which is balanced. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
White holds the centre with pawns on e4. Development is level at three minor pieces each, and Black is up a pawn of material. It is White to move. Black has doubled pawns on the f-file; White has the bishop pair.