Reti: KIA, 2...c5, 3.Bg2 Nc6 4.O-O e6 5.d3 Nf6 6.Nbd2 Be7

Opening Name: Reti: King's Indian Attack (KIA) Formation, 2...c5, 3.Bg2 Nc6 4.O-O e6 5.d3 Nf6 6.Nbd2 Be7

Moves: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. O-O e6 5. d3 Nf6 6. Nbd2 Be7

Description: This line arises from the Reti Opening with a King's Indian Attack setup for White. White fianchettoes the kingside bishop early (Bg2) and castles quickly, aiming for a solid and flexible position. The move 2...c5 from Black challenges the center and attempts to gain space on the queenside. Both sides develop naturally with minor pieces supporting central control.

Characteristic: The position is characterized by a flexible pawn structure where White delays committing to a central pawn advance, focusing instead on piece development and king safety. Black’s early ...c5 and ...e6 moves indicate a classical approach to contesting the center and preparing to develop the light-squared bishop.

Attacking or Defensive: As White, this setup is primarily positional and flexible, allowing for both attacking and defensive plans depending on how the center evolves. White tends to build up quietly before striking. Black’s play is somewhat defensive yet active, challenging the center early and developing pieces to natural squares.

Center Control: This opening does not involve an immediate direct attack on the center by White. Instead, White controls the center indirectly with pieces and pawns on d3 and e4 (often prepared later). Black contests the center more directly with pawns on d5 and c5. Overall, White’s strategy is to pressure the center gradually rather than confront it head-on in the opening moves.