Capturing at c3 too early in the Nimzo Indian

The below chess diagram is an example of a theoretical opening mistake by Black with significant practical implications.

Specifically in this Nimzo Indian Defense Black captured the c3 Knight with his f8 Bishop without any provocation which is OK only after White has placed his King's Knight on f3.

Why is this important? Capturing the c3 Knight is part of a long term blockade strategy for Black where he intends to construct an unbreakable pawn barrier comprised of the c5,d6, and e5 pawns and fight like hell to keep the position closed.



A natural enemy to this is the White f4 pawn which seeks to open files and diagonals that will favor the c1 Bishop which is currently quite immobile and immured by his own pawns.

Note that in the diagram, the White Knight developed to the e2 square staying out of the way of the f2 pawn which will advance in an attempt to liberate the Queen's Bishop aimed at the Black Kingside. This may not seem like a big deal,but remember Black has no dark squared Bishop to oppose White's.

Black gave up that piece to produce a rigid, blocking pawn structure and give White weak doubled c pawns.