ECO code: A07
Opening Name: Reti: King's Indian Attack (KIA) 4.O-O Bf5
Moves: 1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. O-O Bf5
Description: This line arises from the Reti Opening, characterized by White's flexible knight development and fianchettoed bishop on g2. White’s setup with Nf3, g3, and Bg2 aims for strong control of the central and long diagonal squares without committing pawns immediately. Black responds solidly with ...d5 and ...c6, establishing a classical pawn center and supporting the development of the light-squared bishop with ...Bf5.
Characteristic of the move 4...Bf5: By developing the bishop to f5 early, Black actively challenges White's dark squares and puts pressure on the central e4-square. This move also prepares for flexible pawn breaks and supports Black’s central and queenside structure.
Attacking or Defensive: For White, this system is typically more positional and flexible than overtly attacking, aiming to build up pressure gradually rather than direct confrontation. Black’s 4...Bf5 is somewhat more active, seeking to contest key squares and develop smoothly, so it can be seen as a balanced and slightly proactive response rather than purely defensive.
Center Control: White does not immediately occupy the center with pawns but exerts influence over central squares, especially e4 and d5, through piece play and fianchettoed bishop. Black, on the other hand, establishes a solid pawn presence in the center with ...d5 and ...c6, aiming for firm central control.
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.
Practice puzzles and train your tactics with real positions from games that used the Reti: KIA 4.O-O Bf5, and sharpen your opening mastery.
Puzzle 1 of 2 - Move #9 black