"A modern Nimzo-Indian" - free sample from ChessBase Magazine #232
After 4.e3 0-0 5.Bd3 d5 6.a3 Bxc3+ 7.bxc3 dxc4 8.Bxc4 c5 Andrei Volokitin takes Black

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"Recently, there has been a attempt for White to fight for an advantage in the Nimzo-Indian Defence: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Bd3 d5 6.a3. The logical 6...Bxc3+ 7.bxc3 dxc4 8.Bxc4 c5

leads to our starting position. White has obtained the bishop pair, and must choose how to develop their king's knight, i.e. 9.Nf3 or 9.Ne2. This survey serves as a ready-to-use playbook for Black on how to react to both these continuations."

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"According to my analysis, Black has a comfortable game and can play not only for a draw, but ultimately even for victory if White makes routine moves."
The complete training programme from ChessBase Magazine #232 at a glance:

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