1.d4 - Controls the center.
1...d5 - Classical response.
2.Bf4 - London System! White develops the bishop early.
2...Nf6 - Black develops naturally.
3.e3 - White supports d4 and prepares to develop.
3...c5 - Black challenges the center.
4.c3 - White solidifies the center.
4...Nc6 - Black develops the knight.
5.Nd2 - White prepares Ndf3 or Nb3.
White's plans: Play Ngf3, Bd3, O-O. Build slowly and look for e4 breaks.
Black's plans: Develop ...Bg4 or ...Bf5. Castle and play ...e6 or ...e5.
Watch the moves to understand the opening sequence. Use the controls to replay or auto-play the variation.