London System — opening family
8 catalogued lines · ECO A48–D02
The shortest catalogued line of the family runs 1. d4 Nf6 2. Nf3 g6 3. Bf4 — the position below. The continuation chips count how many catalogued lines extend this head with each next move; explore the full tree below and play any branch against the engine.
Variations tree of the London System family
Click any move to jump to that position; switch branches at any point with the alternative moves. Test your knowledge plays the shown position against the engine.
Start
Main continuations
All 8 lines
| Name | ECO | Main line length |
|---|---|---|
| London System | A48 | 5 plies |
| London System | A48 | 7 plies |
| London System | A48 | 8 plies |
| London System, with Bd3 | A48 | 9 plies |
| London System, with Be2 | A48 | 9 plies |
| London System: Poisoned Pawn Variation | D02 | 9 plies |
| London System, with Be2 | A48 | 10 plies |
| London System, with Be2 | A48 | 11 plies |