London System: How to Play It
The setup that plays itself — and the reason so many club players stop improving.
The main line
The London System begins 1.d4 and 2.Bf4. Here is the position after the opening moves, and the moves themselves — play through them on a board before you read the plans, because everything below refers back to this structure.
| 1. | d4 | d5 |
| 2. | Bf4 |
The moves, one at a time
- White d4 — grabs a second central square and supports a knight coming to f3 or c3
- Black d5 — the mirror image, contesting the centre with a pawn rather than from a distance
- White Bf4 — gets the bishop outside the pawn chain before e3 shuts it in
The idea in one paragraph
The London is not an attempt to prove an advantage. It is a system for reaching a good middlegame with almost no memorisation, and the whole point is that you get your setup regardless of what Black does. That is also its trap — you can play it on autopilot for years without learning anything.
The four plans that win games
These are not variations to memorise. They are the recurring plans — learn what you are trying to achieve and the moves become much easier to find.
Get the bishop out before e3
The move order matters more than anything else in the London. Play Bf4 before e3, or your bishop ends up locked behind its own pawn and the whole system loses its point.
The Ne5 clamp
Nbd2, Ngf3, Ne5 supported by f4 is the London's main attacking idea. From e5 the knight eyes d7, f7 and g6, and it is very hard to dislodge without weakening something.
Attack with h4 when Black plays …g6
If Black fianchettoes, the h-pawn is your best piece. h4–h5 gets at the g6 square and the fianchetto structure has no good answer to it once your bishop is on f4 pointing at the same diagonal.
Know the c4 break
The London is not just passive. When Black commits to …c5, meeting it with c3 and later dxc5 followed by a well-timed c4 turns the pyramid into a genuine central initiative.
The pawn structure
A pyramid: pawns on d4, e3, c3 with the bishop outside the chain on f4. Solid, flexible, and almost impossible to refute directly.
Structure outlasts everything else in the opening. Pieces get traded and plans change, but the pawns decide which squares exist and which do not — and that is what you are really choosing when you choose an opening.
Mistakes that lose games
Do not allow …Qb6 for free
…Qb6 hits b2 and d4 at once. The answers are Qc1, Nc3 (if b2 is defended), or in some lines simply Qb3 offering a trade. Have one picked before it happens, because it happens constantly.
The bishop is not safe on f4 forever
…Nh5 chases it. Retreat to g3 and if …Nxg3 hxg3, the open h-file is a genuine asset, not damage. Many London players panic at this and misplace the bishop instead.
Beware the early …c5 and …Qb6 combination
Black hits both weak points at once. Meeting it with dxc5 Qxb2 and then Nbd2 trapping ideas is a real line — know it rather than discovering it at the board.
A game worth studying
Kamsky's London games from 2010 onward — the modern demonstration that the system is a serious weapon, not a beginner's crutch.
The other side of this opening
This page is written for the player playing the London System. For the opposite view — the plans, the traps and the structures from the other side of the board — read How to beat the London System.
Practise it on a live board
Reading an opening guide gets you about a third of the way. The rest comes from playing the structure until the plans are automatic. The Grandmaster Gains Academy has 197 interactive lessons and a full engine, and you can play the London System against it right now, free, in your browser.
Play the London System against the engine
Free, in the browser, no sign-up. Then have every move rated afterwards so you can see exactly where the plan went wrong.
♔ Play free nowRelated openings
- How to play the Queen's Gambit
- How to beat the Queen's Gambit
- How to play the King's Indian Defense
- How to beat the King's Indian Defense
- How to play the Dutch Defense
- How to beat the Dutch Defense
Teaching this opening?
Coaches use Grandmaster Gains to set positions, track which students actually practise, and show parents a rating that means something. See the trainer classroom or book private coaching.
Common questions
Is the London System good for beginners?
It is good for anyone willing to learn its plans rather than its moves. The London is not an attempt to prove an advantage The plans on this page are the same at 800 rating and at 2400 — only the accuracy changes..
What is the main idea of the London System?
The London is not an attempt to prove an advantage. It is a system for reaching a good middlegame with almost no memorisation, and the whole point is that you get your setup regardless of what Black does. That is also its trap — you can play it on autopilot for years without learning anything.
What is the most common mistake in the London System?
Do not allow …Qb6 for free. …Qb6 hits b2 and d4 at once. The answers are Qc1, Nc3 (if b2 is defended), or in some lines simply Qb3 offering a trade. Have one picked before it happens, because it happens constantly.
How much theory do I need to play the London System?
Less than you think, provided you learn the structure instead of the moves. Start with the main line on this page and the first of the four plans — get the bishop out before e3. That is enough to play the opening reasonably from your very next game.