Nimzo-Indian 4.Bd2: Tartakower-Duchamp Variation

Some people wonder why White doesn't respond to the Nimzo-Indian pin 3...Bb4 with 4.Bd2, breaking the pin. The plan was tried long ago by several strong players, but was abandoned and has no followers in the professional ranks. Basically, it allows Black to carry out the hypermodern strategy effectively.

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