Blackmar–Diemer Gambit

The Blackmar–Diemer Gambit (or BDG) is a chess opening characterized by the moves:

1. d4 d5
2. e4 dxe4
3. Nc3
Blackmar–Diemer Gambit
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8
8
77
66
55
44
33
22
11
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Moves1.d4 d5 2.e4 dxe4 3.Nc3
ECOD00
Named afterArmand Blackmar
Emil Josef Diemer
ParentQueen's Pawn Game
Synonym(s)BDG

where White intends to follow up with f3, usually on the fourth move. White obtains a tempo and a half-open f-file in return for a pawn, and as with most gambits, White aims to achieve rapid development and active posting of their pieces in order to rapidly build up an attack at the cost of the gambit pawn. It is one of the few gambits available to White after 1.d4.

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