ECO A48
London System
The position after 1.d4 Nf6 2.Nf3 g6 3.Bf4.
London System
5 half-moves in · no named continuation
8♜
♞
♝
♛
♚
♝
♜
7♟
♟
♟
♟
♟
♟
♟
6
♞
♟
5
4
♙
♗
3
♘
2♙
♙
♙
♙
♙
♙
♙
a1♖
b♘
c
d♕
e♔
f♗
g
h♖
1. d4 Nf6 2. Nf3 g6 3. Bf4
Variations of London System
2 namedLondon System is filed under ECO A48. It is the position after 1.d4 Nf6 2.Nf3 g6 3.Bf4 — 5 half-moves in, with Black to move. Named theory ends here; beyond this the position is yours to work out.