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Chess Opening Theory/1. d4/1...d5/2. e4

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Blackmar-Diemer Gambit (BDG)
a b c d e f g h
8a8 black rookb8 black knightc8 black bishopd8 black queene8 black kingf8 black bishopg8 black knighth8 black rook8
7a7 black pawnb7 black pawnc7 black pawnd7 black kinge7 black pawnf7 black pawng7 black pawnh7 black pawn7
6a6 black kingb6 black kingc6 black kingd6 black kinge6 black kingf6 black kingg6 black kingh6 black king6
5a5 black kingb5 black kingc5 black kingd5 black pawne5 black kingf5 black kingg5 black kingh5 black king5
4a4 black kingb4 black kingc4 black kingd4 white pawne4 white pawnf4 black kingg4 black kingh4 black king4
3a3 black kingb3 black kingc3 black kingd3 black kinge3 black kingf3 black kingg3 black kingh3 black king3
2a2 white pawnb2 white pawnc2 white pawnd2 black kinge2 black kingf2 white pawng2 white pawnh2 white pawn2
1a1 white rookb1 white knightc1 white bishopd1 white queene1 white kingf1 white bishopg1 white knighth1 white rook1
a b c d e f g h
Position in Forsyth-Edwards Notation (FEN)

rnbqkbnr/ppp1pppp/8/3p4/3PP3/8/PPP2PPP/RNBQKBNR b

Moves: 1. d4 d5 2. e4

Blackmar-Diemer Gambit 2. e4

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2. e4

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White offers their e4 pawn in exchange for quick development and open lines. At the professional level this move is considered somewhat suspect, but Black must be careful if they choose to take the pawn as there are many traps in this opening. 2 ...dxe4, accepting the pawn, is the Blackmar-Diemer Gambit. Black has three ways to decline the gambit.

  • e6 transposes to the French Defence
  • c6 transposes to the Caro-Kann Defence
  • Nc6 transposes to the Nimzowitsch Defence
  • c5 is a largely unexplored countergambit.

Theory table

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For explanation of theory tables, see theory table and for notation, see algebraic notation..

1. d4 d5 2. e4

2 3
...
dxe4		 Nc3
e5		 =
French Defence
(by transposition)		 ...
e6		 =
Caro-Kann Defence
(by transposition)		 ...
c6		 =
Nimzowitsch Defence
(by transposition)		 ...
Nc6		 =
...
c5		 =

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References

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Wikipedia has related information at Blackmar-Diemer Gambit

  • Nunn's Chess Openings. 1999. John Nunn (Editor), Graham Burgess, John Emms, Joe Gallagher. ISBN 1-8574-4221-0.
  • Modern Chess Openings: MCO-14. 1999. Nick de Firmian, Walter Korn. ISBN 0-8129-3084-3.
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