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Defense Guide · vs ECO D02
How to Beat the London System
What you're facing: The internet era's favorite opening: one reliable setup against everything — solid, low-theory, and quietly venomous.
The moves you'll see
1. d4 d5 2. Bf4
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Your counter-plans
- Strike with …c5 early and …Qb6 hitting b2 — the London's one tender spot before it castles.
- Copy the setup as Black (…Bf5 systems) and White's edge evaporates into symmetry.
- Delay …e6 until your c8-bishop is developed — locking it in is exactly what London players pray for.
What your opponent is trying to do
- The setup is the strategy: d4, Bf4, e3, c3, Nf3, Nbd2, Bd3, castle — the same wall against nearly anything Black tries.
- Your attacking plan: Ne5, f4 if allowed, and lift a rook via f3–h3 or swing the queen to f3/h5.
- The dark-squared bishop is your soul — meet …Bd6 with Bg3 and never trade it cheaply.
⚠ The trap in this opening: The b2-pawn is genuinely poisoned some moves and genuinely free on others — count the defenders of b2 and c7 every single time.
Rehearse your defense against the computer until the counter-plans are muscle memory — free, in your browser.
♟ Practice Defending Free