Chess Opening Theory/1. d4/1...Nf6/2. Bf4/2...e6/3. e3/3...d5/4. Nd2/4...c5/5. c3

= London System Main Line - Pyramidal Structure c3-d4-e3 =

In the London System following the moves '''1. d4 Nf6 2. Bf4 e6 3. e3 d5 4. Nd2 c5 5. c3''', White's strategy centers around a few key ideas:


 * 1) Pyramidal Pawn Structure: The setup with pawns on c3, d4, and e3 creates a robust and characteristic pyramidal pawn structure for White. This structure solidifies the center, supporting both central and queenside operations.
 * 2) Defending the Queenside Pawn: With an early c3, White strengthens the d4 pawn and also prepares to safeguard the b2 pawn. Black's ...Qb6 often targets this pawn, but the advance of the c3 pawn, combined with other pieces, can neutralize such threats effectively.
 * 3) Active Dark-Squared Bishop: Even though Black may emulate a Queen's Gambit Declined approach, White's dark-squared bishop on f4 remains a dynamic asset. Its active posture grants White a potential advantage, especially in endgame scenarios where its influence can become pronounced.
 * 4) Reacting to ...c4 Advance: Should Black choose to push ...c4, White's plan typically involves a timely e4 pawn break, often preceded by retreating the light-squared bishop to c2, ensuring the center remains fluid and active.
 * 5) Countering ...Qb6: The c3 pawn move not only solidifies the center but also provides White the tactical resource of answering ...Qb6 with Qb3. This counter not only defends potential threats but can also lead to queen exchanges that favor White due to the active piece placement.

In essence, White's strategy in this line of the London System combines a sturdy pawn structure with active piece play, seeking to challenge Black's plans while also creating threats of their own.

Theory table
. '''1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nd2 c5 5. c3'''