The Kieseritzky Gambit, Paulsen Defense Deferred 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. Bc4 d5 7. exd5 Bg7, reaching the position shown below after 14 half-moves.
White holds the centre with pawns on d5. Development is level at two minor pieces each. It is White to move after seven moves. White has doubled pawns on the d-file; Black has doubled pawns on the f-file; the e-file file is fully open.
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, Paulsen Defense Deferred goes 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bg7. It is a variation of the King's Gambit Accepted and is catalogued as ECO C39.
The Kieseritzky Gambit, Paulsen Defense Deferred 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. Bc4 d5 7. exd5 Bg7 at -0.44 at depth 18, which is a slight pull for Black, within normal opening margins. 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 d5. Development is level at two minor pieces each. It is White to move. White has doubled pawns on the d-file; Black has doubled pawns on the f-file; the e-file file is fully open.