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Chess Opening Theory/1. d4/1...Nf6/2. Bf4/2...e6/3. e3/3...d5/4. Nd2/4...c5

London System Main Line with Black ...e6 and ...c5

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London System Main Line with Black ...e6 and ...c5
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Position in Forsyth-Edwards Notation (FEN)

rnbqkbnr/pp3ppp/4pn2/2pp4/3P1B2/4P3/PPPN1PPP/R2QKBNR w

Moves: 1. d4 Nf6 2. Bf4 e6 3. e3 d5 4. Nd2 c5


After 1. d4 Nf6 2. Bf4 e6 3. e3 d5 4. Nd2 c5, Black opts for a setup reminiscent of the Queen's Gambit Declined (QGD). This approach aims for a solid yet flexible structure, central and queenside counterplay, and harmonious development of pieces:

  1. Solid Central Pawn Structure: With ...e6 and ...d5, Black sets up a strong pawn chain in the center, often making it difficult for White to easily break through.
  2. Challenging White's Center: The move ...c5 directly targets White's central d4 pawn. This pawn break aims to destabilize White's pawn center and create counterplay on the queenside.
  3. Development and King Safety: Black can continue with natural developing moves such as ...Nc6 and ...Bd6, exchanging off White's active dark-squared bishop if possible. Following up with ...O-O ensures the king's safety.
  4. Activating the Light-Squared Bishop: One of Black's challenges in the QGD setup is the passive light-squared bishop on c8. Black can consider plans such as ...b6 and ...Ba6, or even a timely ...e5 pawn break, to free this bishop.
  5. Queenside Counterplay: Using the semi-open c-file, Black can look to increase pressure on the queenside. Rooks can be quickly deployed to the c-file, and pieces like the knight on b8 can be developed to c6, supporting the ...c5 break and increasing pressure on d4.
  6. Central Breaks: Depending on White's setup, Black can consider the ...e5 break in the center, especially if the opportunity arises where the d4 pawn can be targeted.

Theory table

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

1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nd2 c5

5
Main Line with Black ...e6 and ...c5 c3 =

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References

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Bibliography

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Wikipedia has related information at London System


v · t · e
Chess openings quick reference
1. e4
1...e5 · Open
2. Nf3
With 2...Nc6:
Four knights: (
)
Italian game: (
)
Spanish game: (
)

With other 2nd moves:
2. Other

1...c5 · Sicilian
2... Nf3 · Open Sicilian
With 2...Nc6:

With 2...d6:

With 2...e6:

With other 2nd moves:
Anti-Sicilians
1... other
Caro-Kann
French
Other


1. d4
1...d5 · Closed
2. c4
2. Nc3
2. other
1...Nf6 · Indian
2. c4
With 2...e6:

With 2...g6:

With other 2nd moves for Black:
2. Nf3
2. other
1... other
Flank
Unorthodox
出典: Chess Opening Theory/1. d4/1...Nf6/2. Bf4/2...e6/3. e3/3...d5/4. Nd2/4...c5

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