Reti: KIA, 2...c5, 3.Bg2 Nc6 4.O-O e6 5.d3 Nge7 6.Nbd2 b6

Opening Name: Reti: King's Indian Attack (KIA) Variation, 2...c5, 3.Bg2 Nc6 4.O-O e6 5.d3 Nge7 6.Nbd2 b6

Moves: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. O-O e6 5. d3 Nge7 6. Nbd2 b6

FEN: r1bqkb1r/p3nppp/1pn1p3/2pp4/8/3P1NP1/PPPNPPBP/R1BQ1RK1 w kq - 0 7

The Reti Opening with the King's Indian Attack setup is a flexible and hypermodern approach where White delays direct occupation of the center in favor of controlling it from a distance. In this line, Black challenges White's setup actively with ...c5 and ...Nc6, aiming to strike at the center and develop quickly.

Characteristic of the move 6...b6: Black prepares to fianchetto the light-squared bishop to b7, increasing control over the long diagonal and putting pressure on White's central and queenside squares. This is a common thematic move in many d5-c5 pawn structures.

Playing style: White’s setup is generally considered positional and flexible, focusing on solid development and control of key central squares without immediate confrontation. Black’s moves, including 6...b6, are active and somewhat aggressive, aiming to challenge the center and develop pieces to natural squares. Overall, White’s play is more defensive and strategic at this stage, while Black looks to increase tension and contest the center.

Center control: This opening does not feature an immediate direct attack on the center by White. Instead, White controls the center indirectly with pieces and pawns positioned behind it (d3, Nf3), while Black actively challenges the center with pawn breaks like ...c5 and piece pressure. Thus, the battle for the center is dynamic and balanced, with both sides maneuvering for influence rather than immediate occupation.