White's plan
- 01 Support d4 with e3 and c3.
- 02 Place the knight on d2 before choosing e4 or c4.
- 03 Use h3 and Bd3 for a kingside setup.
A48–D02 Flank openings
London System
White builds a dependable d4, Nf3, Bf4 setup and attacks when Black reveals the structure.
Best for
Players who want repeatable development with clear middlegame plans.
Study map
Start with one line, then add nearby branches.
0 started · 0 mastered
01London SystemA48 · 3 movesnew02London SystemA48 · 4 movesnew03London SystemA48 · 4 movesnew04London System: Poisoned Pawn VariationD02 · 5 movesnew
Browse all 4 lines
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Main line3 lines
Poisoned Pawn Variation1 lines
Mix the variations
Practice changing book replies after you know at least 2 lines.
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Black's plan
- 01 Challenge d4 with ...c5.
- 02 Use ...Qb6 to pressure b2.
- 03 Avoid copying moves when an active central break is available.
Position fingerprint
The squares that explain the opening
e5 is White's ideal knight post, d4 anchors the setup, and c5 is Black's main challenge.
Keep the position healthy
Practical habits
- React to Black's setup instead of playing the same moves automatically.
- Prepare the e4 break with enough support.