Blackmar-Diemer Gambit Declined: Brombacher Countergambit

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c5

ECO D00

The Blackmar-Diemer Gambit Declined: Brombacher Countergambit is a chess opening reached after 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c5, catalogued under code D00 in the Encyclopaedia of Chess Openings (ECO).

The defining move c5 is chosen by Black on move 4.

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