About this opening
King's Gambit Declined: Panteldakis Countergambit 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 4 half-moves from the
starting position, with the move sequence 1. e4 e5 2. f4 f5.
The opening sequence in prose form: 1.e4 e5, 2.f4 f5. From this position exactly one named continuation is recorded in the encyclopaedia.