Aron Nimzowitsch — chess's great hypermodern prophet, author of 'My System' — created it in the 1920s. Widely considered the most respected reply to 1.d4: control the center with pieces, saddle White with weaknesses.
Built from millions of real games in your rating range — not master theory you'll never see:
d5 — played in 55% of games at club level
Nf6 — played in 9% of games at club level
e6 — played in 9% of games at club level
e5 — played in 9% of games at club level
d6 — played in 3% of games at club level
Every move explained
Nf6: Control e4 with a piece instead of a pawn. That idea sits behind every Indian defense, and it keeps your options wide open.
e6: Flexible and solid — you’re ready for the Nimzo if their knight comes to c3, or the Queen’s Indian if it doesn’t.
Bb4: The Nimzo pin: that knight was about to play e4 — now it can’t move at all. You control the center with pieces, not pawns.
Chess Openings is a free trainer: the bot plays the replies real opponents choose at your level, every move is graded, and your weak spots get retested until they stick.