English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation

A chess opening that leads to a balanced position with chances for both sides, often resulting in a complex middlegame.

The opening begins with a symmetrical pawn structure, where both players have a pawn on the c-file and aim to control the central squares. The Anti-Benoni Variation is a response to Black's attempt to play the Benoni Defense, which is characterized by a pawn on d6 and a fianchettoed kingside bishop. In this variation, White avoids the typical pawn push to d5, instead opting for a more flexible pawn structure.

The Geller Variation, named after the Soviet Grandmaster Efim Geller, is a specific line within the Anti-Benoni Variation. It features an early exchange of pawns on d4, followed by the development of both knights and the fianchetto of White's kingside bishop. This leads to a position with chances for both sides, as White has a slight lead in development and more central control, while Black has a solid pawn structure and potential counterplay on the queenside.

In this opening, both players must be cautious about pawn breaks and piece exchanges, as they can significantly alter the balance of the position. Proper handling of the opening can lead to a complex middlegame with opportunities for both tactical and strategic play. It is essential for players to be familiar with the typical plans and ideas in this opening to navigate the resulting positions effectively.