Queen's Gambit Declined: Barmen Variation

In chess, White starts the game by playing 1.e4 or 1.d4, depending on their preference. The move 1.d4 aims to control the center of the board with a pawn, and allows the queen's bishop and the king's knight to move freely. By playing d4, White puts pressure on Black's position and threatens to capture the pawn on d5. This move is an important part of various openings, including the Queen's Gambit Declined: Barmen Variation, where the game continues with Nf6, e6, Nbd7.

After white plays 1. d4, Black responds with Nf6. This move aims to control the center of the board and develop the knight, while also preparing the pawn on e6. By placing a knight in the center, Black has more control over the board and can exert pressure on White's position. The knight on f6 can also become an important attacker or defender in the game. Lastly, playing Nf6 can also prevent White from playing certain pawn moves that would otherwise limit Black's mobility.

After Black plays Nf6 in response to d4, White can play c4 to immediately challenge Black's control over the central d5 square. This move expands White's control over the center and frees up the c1 Bishop, which can now be developed to an active square. The pawn on c4 also supports White's own pawn on d5, making it more difficult for Black to capture it. This move is part of important openings, such as the Queens Gambit, and can set the stage for further pawn and piece development.

In the Queen's Gambit Declined: Barmen Variation, after 1. d4 Nf6 2. c4, Black can respond with e6. This move prepares to control the central d5 square with a pawn, and also frees up the bishop on f8 to potentially develop to an active square. e6 can also allow the Queen's knight to be developed to e7, where it supports the central pawn and puts pressure on White's position. In sum, e6 is a solid move that can help Black to exchange pieces and simplify the position, and it is a common response to c4 in many chess openings.

After the moves 1. d4 Nf6 2. c4 e6 in chess, White can respond with Nf3. This move develops a knight and further controls the central squares on the board. Additionally, by developing the Knight to f3, White keeps the path open for the light-squared Bishop on c1 to be deployed actively, and supports the pawn on d4. Nf3 also prepares the pawn on g2 to be moved and allows the King to safely castle on the kingside. Thus, the move Nf3 in this position is a flexible and logical choice and sets the stage for further development in the opening.

After the moves 1. d4 Nf6 2. c4 e6 3. Nf3 in chess, Black can respond with d5. This move immediately challenges White's control over the central squares on the board and aims to block the diagonal of White's bishop on c1. By playing d5, Black creates a stronger pawn structure and opens up lines of play for the light-squared bishop on c8 and Queen’s knight on b8. Additionally, the pawn on d5 can become a strong attacker or defender in later stages of the game. In sum, this move is a solid and common response by Black to Nf3 in many chess openings.

In the Queen's Gambit Declined: Barmen Variation, after the moves 1. d4 Nf6 2. c4 e6 3. Nf3 d5, White can respond with Nc3 in chess. This move develops a knight and centralizes the piece while also supporting the pawn on d4. Additionally, Nc3 prepares for the central pawns to advance and puts pressure on Black's position. This move also sets up a potential attack on the Black knight on d5 if it is not properly defended. In sum, Nc3 is a logical and flexible move that sets the stage for further development in the opening and is a common response for White in this variation.

After the moves 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3, Black can respond with Nbd7 in chess. This move develops a knight and prepares to control the central squares on the board. Additionally, Nbd7 allows Black to prepare for future pawn advances on the queenside or kingside. This move also supports the pawn on c5 and helps to prevent the White knight from attacking it. Furthermore, the Knight on d7 might be repositioned to a better square on the board later in the game. In sum, Nbd7 is a solid move that is part of the repertoire for many Black players and prepares for further development in the opening.