1d4Nf62c4e63Nc3Bb4The Nimzo-Indian is a hypermodern opening that attempts to control the center with minor pieces, rather than pawns. It was pioneered by Aron Nimzowitsch, who the opening is named after. The opening is considered to be one of the best responses to the d4, c4, Nc3 setup and has been played by almost every top Grandmaster at some point.
The Nimzo-Indian features many ideas and unique characteristics, the most important of which are the pawn breaks. Of the breaks, the two most common are d5 and c5, which makes them featured in almost every line. Another common idea is playing b6 and Bb7 to develops black's light-squared bishop to b7 in order to control the center.