About this opening
King's Gambit Declined: Norwalde Variation, Bücker Gambit 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 9 half-moves from the
starting position, with the move sequence 1. e4 e5 2. f4 Qf6 3. Nc3 Qxf4 4. Nf3 Bb4 5. Bc4.
The opening sequence in prose form: 1.e4 e5, 2.f4 Qf6, 3.Nc3 Qxf4, 4.Nf3 Bb4, 5.Bc4. 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.