The Nimzo-Indian trades the bishop for the c3-knight to wreck White's pawns or control e4. Strategically rich and rock-solid — a staple of elite repertoires.
Openings / E20–E59
Nimzo-Indian Defense
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 — pin the knight, fight for control.