Nimzo-Indian Defense Fischer Variation Chess Puzzles

The nimzo-indian defense fischer variation is a specific Nimzo-Indian Defense line associated with the Fischer approach to the position after Black’s early ...Bb4. I don’t know the exact, universally agreed move order that uniquely defines this Fischer sub-variation in all sources, so I can’t safely give a precise “play these exact moves” sequence. What is consistent is that it arises from the Nimzo structure where Black pins on b4 and aims to control central dark squares while deciding how to meet White’s central expansion.