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Chess Opening Theory/1. d4/1...d5/2. e4/2...dxe4/3. Nc3/3...Bf5

< Chess Opening Theory | 1. d4 | 1...d5 | 2. e4 | 2...dxe4 | 3. Nc3
Blackmar-Diemer Gambit (BDG)
a b c d e f g h
8a8 black rookb8 black knightc8 black kingd8 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 kinge5 black kingf5 black bishopg5 black kingh5 black king5
4a4 black kingb4 black kingc4 black kingd4 white pawne4 black pawnf4 black kingg4 black kingh4 black king4
3a3 black kingb3 black kingc3 white knightd3 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 black kingc1 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)

rn1qkbnr/ppp1pppp/8/5b2/3Pp3/2N5/PPP2PPP/R1BQKBNR w

Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 Bf5

Blackmar-Diemer Gambit (BDG): Zeller Defense

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3. Bf5

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Bf5 defends the pawn on e4 and develops the queenside bishop, with intentions of keeping the pawn as it is a thorn to White who can't play Nf3 or Bd3, otherwise the knight/bishop will be taken by the pawn.

Responses

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White usually responds with 3. f3?!, which attacks the e4 pawn albeit blocking the development of the knight to f3, which can be rectified after exd3. A rare option that is preferred by computers is g4, kicking the bishop away with the intention of creating a pawn storm with h4 and h5, forcing Black to play defensively.

Other than that, other options can block pieces from developing, get kicked away by pawns, or just do nothing.

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 dxe4 3. Nc3 Bf5
    4 5 6 7 8
    Queen Attack f3 exf3 Qxf3
    Bc8?!    		 Be3
    Nf6    		 O-O-O e6 d5
    Nxd5    		 =
    Pawn Storm g4 Bg6 h4
    h6    		 h5 Bh7 Bg2
    Nf6    		 g5 hxg5 ⩱

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References

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