The London System is a chess opening that allows players to develop their pieces in a solid and flexible manner. It typically begins with the moves 1.d4 and 2.Nf3, followed by 3.Bf4. This setup is favored by many players because it can be played against various defenses and does not require extensive memorization of theory. One of the key features of the London System is its pawn structure, which often includes pawns on d4 and e3. This structure provides a strong foundation for launching attacks while maintaining a solid defense. The system is popular among club players and is often used in amateur tournaments due to its straightforward approach.