Library/Openings/Bishop's Opening/Calabrese Countergambit/Jaenisch Variation ECO C23
Opening· 5 plies

Bishop's Opening: Calabrese Countergambit, Jaenisch Variation

An entry in the Encyclopedia of Chess Openings (ECO C23), reached after 5 half-moves: 1. e4 e5 2. Bc4 f5 3. d3.

Bishop's Opening: Calabrese Countergambit, Jaenisch Variation ECO C23
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Black rook
Black knight
Black bishop
Black queen
Black king
Black bishop
Black knight
Black rook
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
White bishop
White pawn
White pawn
White pawn
White pawn
White pawn
White pawn
White pawn
White pawn
White rook
White knight
White bishop
White queen
White king
White knight
White rook
5/5
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  3. 2.
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End of this line

No further variations branch from this position in our database. To explore neighbouring ideas:

About this opening

Bishop's Opening: Calabrese Countergambit, Jaenisch Variation 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 5 half-moves from the starting position, with the move sequence 1. e4 e5 2. Bc4 f5 3. d3.

It belongs to the Bishop's Opening family. Within that family this is a level-2 branch (the Calabrese Countergambit → Jaenisch Variation line). The immediate parent line is Bishop's Opening: Calabrese Countergambit, transitioned via 3.d3.

The opening sequence in prose form: 1.e4 e5, 2.Bc4 f5, 3.d3. 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.