About this opening
Bishop's Opening: Calabrese Countergambit is an opening in the Encyclopedia of Chess Openings,
classified under code C23. 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. Bc4 f5.
It belongs to the Bishop's Opening family. Within that family this is a sub-variation (the Calabrese Countergambit line).
The opening sequence in prose form: 1.e4 e5, 2.Bc4 f5. From this position exactly one named continuation is recorded in the encyclopaedia.