Nimzowitsch Defense: Scandinavian Variation, Bogoljubov Variation, Richter Gambit

The move e4 in the Nimzowitsch Defense aims to control the center of the board and open lines for the white pieces. By controlling the center, white can potentially gain an advantage in piece mobility and attacking options. However, playing e4 also weakens the d4 square, which can be exploited by black in certain variations of the opening. It's important for white to carefully consider the potential risks and rewards of playing e4 before making the move.

Black's move Nc6 in response to e4 aims to control the d4 square, which is typically a target for white's pieces in the opening. It also develops the knight to a good square and prepares for potential pawn exchanges in the center with d5. Additionally, playing Nc6 allows black to avoid some of the highly theoretical lines that can arise from more common opening moves such as e5 or c5. However, playing Nc6 also means that black must be prepared to defend against potential attacks on the d5 square and be flexible in their plans depending on how the opening develops.

White's move d4 in the Nimzowitsch Defense aims to further control the center and gain space on the board. By playing d4, white also threatens to open lines for their queen and bishop, potentially putting pressure on black's position. This move also prevents black from playing a pawn to d5 without immediately trading pawns, which allows white to potentially gain a tempo by recapturing with a piece. However, playing d4 can also allow black to trade pawns and equalize the position, so white must be prepared for different possible outcomes of the opening.

In the Nimzowitsch Defense: Scandinavian Variation, Bogoljubov Variation, Richter Gambit, Black's move d5 responds to White's move d4 by challenging White's central control and contesting space on the board. This move also opens lines for Black's bishop and queen, potentially putting pressure on White's position. However, it also means that Black will have at least one pawn that is not protected by another pawn, which can make that pawn a target for White. Black must be prepared to defend and potentially sacrifice this pawn in order to maintain their position and counterattack White's position.

White's move Nc3 in response to Black's d5 aims to put pressure on Black's pawn and potentially disrupt their development. This move also prepares for potential exchanges in the center and develops the knight to a more active square. Additionally, playing Nc3 allows White to potentially threaten the b5 square and create weaknesses in Black's position. However, White must also be careful not to overextend their position and leave their own pawns vulnerable to attack. Playing Nc3 requires careful consideration of both short-term and long-term goals in the opening.

Black's move dxe4 in response to White's Nc3 offers the pawn on e4 as a sacrifice in order to gain control of the center and develop pieces. This move also opens lines for the bishop and queen and puts pressure on White's position. By capturing on e4, Black also gains a tempo as White will need to recapture the pawn with another piece, giving Black an opportunity to continue developing their position. However, playing dxe4 also means that Black will have an isolated pawn on d5, which could become a target for White in the middle game. Black must be prepared to defend this pawn and use it as a source of counterplay when possible.

In the Nimzowitsch Defense: Scandinavian Variation, Bogoljubov Variation, Richter Gambit, White's move d5 in response to Black's dxe4 aims to undermine Black's control of the center and gain space on the board. This move also attempts to force Black to move their knight or block it with a pawn, disrupting their development. Additionally, playing d5 prepares for potential pawn advances on the queenside and puts pressure on Black's pieces. However, capturing on d5 with the knight can also lead to an awkward position if the knight is later attacked, and leaving an isolated pawn on d5 can also become a weakness if not carefully protected. Playing d5 requires careful consideration of both short-term and long-term goals in the opening.

Black's move Nb8 in response to White's d5 aims to protect their knight while preparing to kick White's pawn with a future move of a6. This move also allows Black to potentially reroute the knight to a more active square later in the game. By moving the knight away, Black also frees up space to potentially move their c-pawn and allow their queen and bishop to enter the game. However, playing Nb8 also means that Black's knight is temporarily out of play and may need several moves to become active again. Black must be prepared to defend against any threats in the interim and use their other pieces effectively until their knight is back in the game.

White's move f3 in response to Black's Nb8 aims to gain control of the e4 square and restrict Black's options. This move also prevents Black from playing a future pawn push to g4 with their knight and prepares for potential pawn exchanges in the center. Additionally, playing f3 can help secure the king's position in preparation for the middle game and prevent any unwanted back rank weaknesses. However, playing f3 also means that White's f-pawn is now weakened and can become a target for Black's pieces in the future. White must be prepared to defend against any counterattacks and plan their next moves carefully based on the evolving position of the game.