The Kieseritzky Gambit, Berlin Defense, de Riviere Variation is a variation of the King's Gambit Accepted, catalogued as ECO C39. The line runs 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Nxg4 d5, reaching the position shown below after 12 half-moves.
Both sides have pawns in the centre (White on e4, Black on d5), and one pawn capture is available, so the structure has not settled yet. Development is level at one minor pieces each. It is White to move after six moves. Black has doubled pawns on the f-file; Black’s f- and h-files pawns are isolated.
On the King's Gambit Accepted generally: A romantic opening where White sacrifices a pawn for rapid development and attacking chances.
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The Kieseritzky Gambit, Berlin Defense, de Riviere Variation goes 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Nxg4 d5. It is a variation of the King's Gambit Accepted and is catalogued as ECO C39.
The Kieseritzky Gambit, Berlin Defense, de Riviere Variation is ECO C39. ECO codes group openings by their move order, so nearby codes cover closely related lines of the King's Gambit Accepted.
Stockfish evaluates the position after 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Nxg4 d5 at -0.02 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.
Both sides have pawns in the centre (White on e4, Black on d5), and one pawn capture is available, so the structure has not settled yet. Development is level at one minor pieces each. It is White to move. Black has doubled pawns on the f-file; Black’s f- and h-files pawns are isolated.