About this opening
Danish Gambit is an opening in the Encyclopedia of Chess Openings,
classified under code C21. 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 5 half-moves from the
starting position, with the move sequence 1. e4 e5 2. d4 exd4 3. c3.
The opening sequence in prose form: 1.e4 e5, 2.d4 exd4, 3.c3. 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.