Nimzo-Indian Defense: Normal Variation, Hübner Deferred

A solid and flexible chess opening for Black, focusing on controlling the center and creating imbalances in pawn structure.

The opening in question is a popular and well-respected choice that offers Black a solid and flexible setup against White's 1.d4. In this opening, Black aims to control the center with their pieces, rather than pawns, and create imbalances in the pawn structure that can be exploited later in the game. The key feature of this variation is the delayed development of Black's c5 pawn, which allows for more flexibility in the pawn structure.

White's pawn on e3 supports the d4 pawn and prepares for the development of the light-squared bishop, while Black's Bb4 pins the Nc3, exerting pressure on the center. Black's c5 pawn break is a key idea in this opening, as it challenges White's central pawn duo and can lead to various pawn structures depending on how White responds.

The variation is named after the German Grandmaster who contributed significantly to the theory of this line. This variation is known for its flexibility, as Black can choose between different pawn structures and plans depending on White's play.

In general, the opening leads to rich and complex middlegames, where both sides have chances for active play and imbalances to exploit. The variation in question is no exception, offering Black a solid foundation for counterplay and strategic battles.