King's Indian Defence
The King's Indian Defence is a common chess opening. It is defined by the following moves:
1. d4 Nf6
2. c4 g6
Black intends to follow up with 3...Bg7 and 4...d6. White's major third move options are 3.Nc3, 3.Nf3 or 3.g3, with both the King's... Wikipedia