London System
ECO A48 · London System · solid · beginner
The London System (A48) is a solid chess opening in the London System family, played by White. It arises after the moves 1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6. Universal system for White. Easy to learn. Recommended for beginner players.
Moves: 1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6
About this opening
The London System is less an opening than a complete setup: White plays d4, Nf3, Bf4, e3, c3 and Bd3 in almost any order, against virtually any Black defense. The dark-squared bishop develops outside the pawn chain before e3 closes it in, which is the whole point of the system. Plans are easy to learn — control e5, expand on the kingside, keep the structure solid — which makes the London ideal for players who want positional understanding instead of memorized theory. Kamsky and Carlsen have shown it can be a genuine winning attempt even at elite level.