ECO code: A07
Opening Name: Reti: King's Indian Attack (KIA) 4.O-O Bf5 5.d3 e6
Moves: 1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. O-O Bf5 5. d3 e6
Description: This line arises from the Reti Opening, characterized by White’s flexible development and kingside fianchetto with Bg2. White castles early with 4.O-O, prioritizing safety and rapid development. Black responds actively by developing the dark-squared bishop to f5 before closing the center with e6. White’s move 5.d3 supports the center solidly without immediate confrontation.
Characteristic of the Moves: The move Bf5 by Black is a thematic developing move, aiming to exert pressure on White’s central squares and maintain active piece play before committing the pawn structure. White’s d3 is a hallmark of the King's Indian Attack setup, reinforcing control over e4 and maintaining a flexible pawn structure.
Attacking or Defensive: As White, this setup is primarily positional and flexible, allowing for a potential kingside attack later but initially focusing on solid development and central control. Black’s setup is solid and somewhat defensive, aiming to counter White’s plans by securing the center and developing pieces actively.
Center Control: This opening does not involve an immediate clash for the center but instead features a strategic, restrained approach where White controls key central squares indirectly with pieces, while Black sets up a solid pawn structure to contest central influence later.
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.