Chessy
Master the London System Against ...e6
By move four you've played the classic London System setup: 1.d4 d5 2.Nf3 Nf6 3.Bf4 e6 4.e3. You've placed your king's bishop outside the pawn chain, kept your options open, and avoided the theory-heavy waters of the Queen's Gambit. Black now has the move — and plenty of choices. Below you'll find an interactive drill that adapts to your play, plus the key statistics from over seven million games that show what really works. Let's walk through White's ideas before you dive in.
Play the Queen's Pawn Game: London System: e6 against the engine
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Now it's your turn: play through the position in the interactive drill below. The engine adapts to your moves, so you'll learn exactly how to handle each of the
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In this London System position, you're aiming for a solid but flexible centre. Your pawn on d4 and e3 support each other, the bishop on f4 is active outside your pawns, and your knight on f3 eyes e5 and g5. You haven't committed your queen's knight yet, which gives you options: you can play Nbd2, c3, or even develop the light-squared bishop to d3 or e2 depending on Black's reply. The engine assessment of +0.21 shows a tiny edge for White — you can call it dead level. That means you're very slightly better, but the opening hasn't forced any advantage yet. You're fighting for a comfortable middlegame where your pieces find natural squares while you watch for Black's typical counterplay along the c-file or with a kingside fianchetto.
Black's Top Replies and How You Should Answer
Black has six popular moves here. Here's what the statistics show with White's winning percentage in each case (draws excluded):- Bd6 (2,552,771 games — the most common). White scores 51.1%. Black immediately challenges your active bishop. You can trade on d6, recapture with the queen, or retreat to g3. The position stays calm.- c5 (1,938,079 games). White scores 50.1%. The engine's favourite. Black strikes at d4 immediately. Your best response is Nbd2, keeping the centre flexible. If Black replies Qb6, you have Rb1 to defend b2. This is the critical tabiya to know.- Be7 (842,032 games). White scores 52.5%. A quieter development — you can castle soon and aim for the standard London setup with c3 and Nbd2.- Nc6 (703,512 games). White scores 54.7% — your best result among the top replies. You can meet this with c3, solidifying the centre and preparing Bd3. The knight on c6 doesn't pressure d4 as effectively as c5 does.- Bb4+ (280,280 games). White scores 57.8% — your best percentage of any major line. You can block with Nbd2, which develops and parries the check at once.- a6 (230,531 games). White scores 52.1%. A waiting move; you continue developing naturally with Bd3 or Nbd2.
The Engine's Preferred Line
Stockfish recommends 4...c5 as Black's strongest continuation, followed by 5.Nbd2 Qb6 6.Rb1. This is a concrete line you should understand. Black's queen goes to b6, attacking b2, and your rook on b1 defends it while keeping your pawn structure intact. Notice White didn't rush to castle or develop the light-squared bishop — the immediate priority is securing the queenside against Black's pressure. The evaluation stays near +0.21: you're still fine. If Black doesn't play c5, your job gets easier, because you can finish development with c3, Bd3, 0-0, and then decide between a kingside attack or a slow squeeze.
Mistakes to Punish and Avoid
Your highest-scoring replies are Bb4+ (57.8%) and Nc6 (54.7%). When Black plays Bb4+, beginners often panic and block with Bd2 or c3 — instead, develop with Nbd2, which covers the check and brings a piece out. Against Nc6, don't chase it with Bb5 or waste time. Play c3, making d4 rock-solid. The biggest mistake White makes in this position is over-pressing. The London is a system, not a forced win. If Black plays accurately, you'll reach a balanced middlegame where your slight space advantage and active bishop give you comfortable chances — but only if you don't ruin your pawn structure or leave the king in the centre too long. Stick to the plan: develop, castle, and choose the right moment to expand with e4 or c4.
Results across 7,559,062 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Bd6 | 2,552,771 | 51.1% |
| c5 | 1,938,079 | 50.1% |
| Be7 | 842,032 | 52.5% |
| Nc6 | 703,512 | 54.7% |
| Bb4+ | 280,280 | 57.8% |
| a6 | 230,531 | 52.1% |
Frequently asked questions
Is the London System good for beginners?
Yes — it's one of the most popular opening systems at club level because it's easy to learn and doesn't require memorising long forcing lines. After 1.d4 d5 2.Nf3 Nf6 3.Bf4 you've already completed a key piece of development, and the setup works against virtually any Black reply. The stats back it up: White scores 52.0% from this position across millions of games.
What is Black's best move against the London System after e3?
The engine prefers 4...c5, challenging your centre immediately. White's best reply is 5.Nbd2, then if Black plays 5...Qb6 you defend with 6.Rb1. The position stays roughly equal (+0.21 to White). Among human players, 4...Bd6 is more common — Black trades off your active bishop.
Should I trade bishops when Black plays Bd6?
It depends on your style, but trading on d6 is perfectly fine. After Bxd6 Qxd6 or Bxd6 cxd6, you keep a solid pawn centre and Black's pawn structure may become a long-term target. White scores 51.1% from this line, so you're not giving up any edge.
How do I deal with Bb4+ in the London System?
This check occurs in about 280,000 games, and White scores an excellent 57.8%. The best response is 5.Nbd2 — you block the check while developing your queen's knight. Don't panic and block with c3 or Bd2 unless you have a specific reason. Nbd2 is simple, thematic, and gets you a good game.