Chess Opening Theory/1. d4/1...Nf6/2. Bf4/2...e6/3. e3/3...d5/4. Nd2/4...c5/5. c3/5...Nc6/6. Ngf3

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

In essence, after '''1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nd2 c5 5. c3 Nc6 6. Nf3''', White's strategy revolves around leveraging the solid pyramidal pawn structure, maximizing piece activity, particularly with the knight on e5, and creating scenarios where Black might inadvertently weaken their own king's safety. White has several strategic goals:


 * 1) Pyramidal Pawn Structure: The pawns on c3, d4, and e3 form a sturdy pyramid structure. This structure provides a strong central presence and serves as a foundation for White's piece activity. It not only bolsters the center but also supports the plans of advancing the central or kingside pawns.
 * 2) Knight to e5: With the knight developed to f3, White often aims to plant it on the e5 square, a key central outpost. The move Nf3 supports this idea, and the pyramidal structure aids in maintaining the knight's dominance on e5.
 * 3) Bishop Considerations: White's dark-squared bishop on f4 is a crucial piece. The option of capturing on d6, while tactically possible, often helps Black to harmonize development after ...Qxd6 or ...exd6. As a strategic alternative, retreating the bishop to g3 keeps the tension and presents Black with the dilemma of opening the h-file if they decide to capture on g3.
 * 4) Supporting the e5 Knight: In scenarios where the bishop is retreated to g3, White has the added benefit of supporting the knight on e5 with the pawn move f4. This enhances the stability of the knight on e5, making it a central bulwark.
 * 5) Central Pawn Wedge: If Black decides to challenge the knight on e5 prematurely and captures, White can recapture with the d-pawn. This results in a powerful central pawn wedge with pawns on e5 and e4, giving White more space and control in the center.
 * 6) Proactive Play Against the Black King: By maintaining tension and giving Black the option to open files, especially the h-file, White employs a strategy where Black might inadvertently expose their king. Creating potential vulnerabilities around the opponent's monarch can lead to tactical opportunities.