King's Indian Defense: Averbakh Variation, Geller Defense

A solid and flexible chess opening for Black, focusing on counterplay and pawn breaks in the center and on the queenside.

The opening is a popular and dynamic choice that offers Black a solid and flexible setup against White's classical pawn center. In this variation, Black allows White to establish a strong pawn center with pawns on d4, e4, and c4, while focusing on counterplay and pawn breaks in the center and on the queenside.

White's development is straightforward, with the knight on c3, the bishop on e2, and the dark-squared bishop on g5, pinning the f6-knight and exerting pressure on the d6-pawn. Black's setup is characterized by the fianchettoed bishop on g7, the knight on f6, and the pawn structure with pawns on d6 and g6.

Black's main plan in this opening is to prepare and execute the pawn break with ...e5 or ...c5, challenging White's central pawn structure and creating counterplay. The specific defense, with the knight on d7, supports the ...e5 pawn break and adds extra protection to the f6-knight.

White's main plan is to maintain the central pawn structure and exploit the space advantage, while also looking for opportunities to create weaknesses in Black's position. Both sides have chances for active play, making this opening a popular choice for players seeking a rich and complex middlegame.