Nimzo-Indian Defense: Normal Variation, Schlechter Defense

The first move, d4, is a classic opening move that controls the center and enables white to free the bishop on c1 and the queen. It also prepares for the eventual development of the knight on c3. The move d4 is a sound and aggressive choice in the opening and sets the stage for a dynamic and tactical game.

Black's move Nf6 is a flexible and common response to d4. It aims to attack white's control of the center, and prepares to challenge the pawn on e4 or the pawn on c4. The knight on f6 also helps to develop Black's pieces and support possible future attacks on the center or the queen's side. By developing a minor piece, Black puts pressure on white's position from the very first move.

White's move c4 is a strong and aggressive response to Black's Nf6. It reinforces White's control of the center and increases the pressure on Black's position. The pawn on c4 also frees up the c1-square for the development of White's knight and allows for future expansion on the queen's side. Additionally, the move c4 inhibits Black's natural developing move of …d5, which can lead to a cramped position for Black. In sum, c4 is a key move in many openings and sets the stage for a lively game.

In the Nimzo-Indian Defense: Normal Variation, Schlechter Defense, Black's move e6 is a reasonable and flexible response to c4. By controlling the d5-square, Black restricts White's pawn breaks and develops the bishop on c8 to support a future ...d5 push. The move e6 also prepares for castling and frees up the queen's bishop. Additionally, the pawn on e6 prevents White's potential attack with pawn advances like f4 or g4. In sum, e6 is a solid developing move that prepares for future central pawn breaks and maintains a solid position.

White's move Nc3 is a developing move that aims to reinforce the control of the center and prepare for future pawn breaks. By placing a knight on the c3-square, White supports the pawn on d4 and prepares to develop the bishop. The knight on c3 also controls the d5-square, which can limit Black's pawn break options. Additionally, the move Nc3 prepares for the eventual castling of the king and supports future tactical operations like Nb5. In sum, Nc3 is a common and effective move in many openings.

Black's move Bb4 is a strategic move aimed at targeting White's knight on c3. By pinning the knight, Black puts pressure on White's center and prepares for the eventual capture of the knight. Moreover, the bishop on b4 controls the d2-square, which can limit the development of White's other knight. Additionally, the move Bb4 puts White in a difficult dilemma as to whether to protect the knight or to allow it to be captured, which can result in a loss of tempo for White. In sum, Bb4 is an active move that creates immediate pressure on White's position.

In the Nimzo-Indian Defense: Normal Variation, Schlechter Defense, White's move e3 is a solid defensive move that prepares for the development of the bishop on c1. The pawn on e3 also supports the pawn on d4, which can help defend against potential attacks from Black's pieces. Additionally, the move e3 prepares for future pawn advances like f4 or d5, which can expand White's position and limit Black's options. The pawn on e3 also clears the way for the queen side knight to be developed. In sum, e3 is a useful move that strengthens White's position and prepares for future attacking opportunities.

Black's move O-O is a standard developing move that helps activate the king and connect the rooks. By castling kingside, Black also prepares to shift the focus of the game to the center and the queenside. Moreover, castling kingside can improve the safety of Black's king and prepare for potential tactical operations in future attacks. In sum, O-O is a critical move in the opening phase of the game that helps Black establish a solid and stable position.

White's move Bd3 is a standard developing move that prepares for the eventual control of the center. By placing the bishop on d3, White eyes the c2-pawn and prepares to expand in the center with c4 or d5. Moreover, Bd3 supports the pawn on e3, which can increase the control of the d4-square and establish a solid position. Additionally, the bishop on d3 is well positioned to support future tactical operations in the center or on the queenside. In sum, Bd3 is a flexible move that sets the stage for dynamic and tactical situations.

In the Nimzo-Indian Defense: Normal Variation, Schlechter Defense, Black's move d5 is a key central pawn break that aims to undermine White's control of the center. By pushing the pawn to d5, Black opens lines of attack for the bishop on c8 and gains space in the center. Moreover, the pawn on d5 puts pressure on the knight on c3, cramps White's position and gains control of the square e4. Additionally, the move d5 can free up Black's pieces and disrupt White's position by forcing an exchange or weakening the pawn structure. In sum, d5 is a dynamic move that sets the stage for a complex and tactical game.

White's move Nf3 is a natural developing move that prepares to put more pressure on the d5-pawn with a future e4 push. Moreover, by developing the knight, White frees up the dark-squared bishop and prepares for future tactical operations on the queenside or the center. Additionally, Nf3 helps White solidify control over the d4-square and prepares to support the pawn on e3. The move Nf3 also prepares for a potential exchange of knights and can improve the control over the center. In sum, Nf3 is a useful move that strengthens White's position and prepares for future attacking opportunities.

Black's move b6 is a flexible developing move that aims to prepare for the development of the bishop on b7 and target the c5-square. By developing the bishop to b7, Black establishes a strong diagonal and activates the piece. Additionally, the move b6 can help support the future pawn push of ...c5, which can challenge White's control of the center and add complexity to the game. Moreover, b6 can prevent future tactical operations by controlling the diagonal a8-h1. In sum, the move b6 is a useful move that supports Black's plans and prepares for future attacking opportunities.