The Nimzo-Indian Defense: Normal Variation, Schlechter Defense is a classic opening where Black aims for a solid but flexible pawn structure and piece development. The position after 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O d5 displays these strategies, with Black poised to exchange in the center and exert pressure on White's pawns.
Best Moves
The Strategic ♙cxd5
The move ♙cxd5 is a thematic capture that addresses the imbalance in pawn structures. By exchanging on d5, White facilitates the opening of the c1-h6 diagonal and tries to loosen Black's central grip. This move can lead to central breakthroughs with ideas like ♘Ne5, aiming at the weak Black squares, bolstering central pressure and creating tactical opportunities.
The Prophylactic ♙a3
This move, ♙a3, forces the bishop on b4 to decide its fate, as delaying this decision could allow Black to increase their stranglehold on the center. It supports White's potential to hold the bishop pair and limits Black's option to double White's pawns on the c-file.
Important Alternatives
The Flexible ♕Qe2
Playing ♕Qe2 aims at supporting a potential advance of the pawn to e4 in the future, while also getting the queen off the initial rank. This maintains flexibility in pawn structure and leaves Black guessing whether d4 will be reinforced or whether e4 might be part of White's plans.
The Aggressive ♘Ne5
♘Ne5 plan to exert immediate pressure on Black's position, particularly on the pinned pawn on d5. This is an active choice with tactical motives, aiming to achieve initiative by threatening the well-placed f6-knight or preparing pawn advances.
Critical Mistakes
The Misguided ♘Ng5
♘Ng5 appears to aim for tactical shots on f7 and h7 but doesn't deal with center tensions or threaten the well-placed bishop on b4. It underestimates Black's potential central break and development upon captures or pawn advances. The move doesn't harmonize with White's other pieces, leading to potential weaknesses upon simplifications.
The Unwise ♗Bb1
This backward bishop move, ♗Bb1, is overly passive, relinquishing any small central edge White has with no concrete plan. It doesn't contribute to White's development or tactical threats and only serves to lose time, enabling Black efficient deployment and central control.
Conclusion
The Nimzo-Indian Defense: Normal Variation, Schlechter Defense provides a rich position for both sides to explore their strategic aims. For White, the central space control and piece activity must be the focus, while Black targets counterplay and pawn structure balance. Accurate central play and consideration of tactical opportunities guide the outcome in this complex and instructional battleground.