ECO code: A07
Opening Name: Reti: King's Indian Attack setup with Bg7 and 4.O-O e5
Moves: 1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5
Description: This line arises from the Reti Opening, where White fianchettoes the kingside bishop and castles early, aiming for a flexible and hypermodern setup. By playing 4...e5, Black immediately stakes a strong claim in the center, challenging White’s control and preparing for active piece play. White’s setup is solid and geared towards controlling key central squares from a distance rather than occupying them directly.
Characteristic: The key characteristic of this variation is Black’s early central counterattack with 4...e5 against White’s hypermodern fianchetto structure. White refrains from occupying the center early, instead relying on piece pressure and flexibility.
Attacking or Defensive: For White, this position is generally more positional and flexible, aiming for a strategic buildup rather than immediate attack. Black’s 4...e5 is more aggressive, directly challenging the center and preparing for active piece play.
Center Control: Black actively attacks the center with 4...e5, while White adopts a hypermodern approach by controlling the center from a distance rather than occupying it immediately.
This opening is defined by the position shown on the board below. The moves displayed are a typical sequence that leads to it, but different sequences can reach the same position and still carry the same opening name.