Nimzo Indian Middlegame (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 / 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3) Chess Puzzles

“Nimzo Indian middlegame” is not a single officially defined variation, but usually means the middlegame arising after 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4. Its defining features are the bishop pin on c3, pressure against e4, and White’s possible doubled c-pawns after Bxc3+.