Chess Opening Theory/1. Nf3/1...d5/2. g3

2. g3 - King's Indian Attack
White is most likely aiming to establish a King's Indian Attack. The idea is very similar to that of the King's Indian Defence as played by Black. The extra tempo enables White to take a more aggressive approach to the system.

Theory table
.


 * 1. Nf3 d5 2. g3