1.d4 Nf6 2.Bf4 - London System.
2...g6 - King's Indian setup by Black.
3.e3 - Standard London move.
3...Bg7 - Black fianchettoes the bishop.
4.Nf3 - White develops naturally.
4...d6 - Black completes the KID setup.
White's plans: Play h3 to prevent ...Bg4. Castle and build with c3, Nbd2.
Black's plans: Play ...O-O, ...Nbd7, ...e5 or ...c5 to challenge the center.
Watch the moves to understand the opening sequence. Use the controls to replay or auto-play the variation.