Grünfeld Defense: Three Knights Variation, Hungarian Attack

The first move, 1. d4, is a standard opening move in chess. White moves the d-pawn two spaces forward to control the center of the board and open lines for pieces to move out. This move aims to establish a strong pawn structure and restrict Black's options. By controlling the center, White has greater flexibility in terms of piece placement and can create opportunities to attack Black's weaknesses. The move is also a preparatory move for setting up the Grünfeld Defense: Three Knights Variation, Hungarian Attack.

After the move 1. d4 by White, Black plays Nf6. This move challenges White's control over the center of the board and aims to contest the d4 square. It also develops the knight and prepares to castle. Playing Nf6 is a very flexible move for Black, as it sets up several different possible defenses. For example, it can lead into the Indian defenses (King's Indian Defense, Queen's Indian Defense, etc.), or into the Grünfeld Defense, which is a very aggressive counterattacking opening.

Once Black has played Nf6, White wants to play c4 in order to further challenge Black's control of the d4 square and to increase their own control over the center. This move also opens up lines for White's queen and bishop, which can then choose different diagonals to be developed. By playing c4, White further establishes a strong pawn structure and creates opportunities for development on both sides of the board. This move can also lead into several other different openings, such as the Queen's Gambit and the Benoni Defense.

In the Grünfeld Defense: Three Knights Variation, Hungarian Attack, Black's most popular response to the move 2.c4 is to play g6. This move prepares for the development of the bishop to g7 and creates a strong pawn chain. The move also sets up the possibility of a fianchetto structure on the king's side. By playing g6, Black is also preparing to challenge White's control over the center of the board in a more indirect way. This move can also lead to various strategic and tactical ramifications, such as the formation of a solid pawn structure or the creation of positional weaknesses that White can exploit.

After the moves 1. d4 Nf6 2. c4 g6, White typically wants to play Nc3, in order to further develop their pieces and control the central squares. By developing the knight, White aims to put pressure on Black's pawn on d5 and make it more difficult for Black to develop their own pieces. This move also sets up the potential for a Three Knights Variation, in which White continues with Nf3. By playing Nc3, White is preparing their pieces for future attacks against Black's defenses and controlling the board to their advantage. Additionally, the knight on c3 can provide support to White's queen and establish possible tactical opportunities later in the game.

After the moves 1. d4 Nf6 2. c4 g6 3. Nc3, Black often chooses to respond with d5 to immediately challenge White's control over the center of the board. By playing d5, Black aims to break up White's pawn structure and create direct counterplay of their own. This move also prepares the development of Black's bishop to g7 and provides a central pawn that can be used to defend against future attacks. Additionally, playing d5 is a common response to White's Three Knights Variation, as it allows Black to establish pieces and counterattack with greater strength.

In the Grünfeld Defense: Three Knights Variation, Hungarian Attack, after Black responds to 3.Nc3 with d5, White usually wants to play Nf3. This move aims to continue developing White's pieces and control the central squares of the board. By placing the knight on f3, White prepares for potential future attacks while simultaneously preventing Black from immediately capturing the e4 pawn. The move also supports White's pawn on d4 and introduces the possibility of a discovered attack, since the knight can put pressure on Black's queen. Additionally, playing Nf3 sets up various follow-up moves, such as offering a pawn exchange on d5 or attacking Black's defenses with f3.

After the moves 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3, Black usually responds by playing Bg7. This move aims to complete Black's fianchetto development and put pressure on the center of the board. By developing the bishop to g7, Black prepares to castle on the kingside and also puts pressure on the pawn on d4. The bishop on g7 also supports the pawn on e5, which can be an important defender in certain variations of the Grünfeld Defense. Additionally, playing Bg7 allows Black to prepare for future attacks or counterattacks on either side of the board.

After the moves 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7, White usually plays Bf4, which attacks the knight on g7 and puts pressure on Black's control over the center of the board. Additionally, the bishop on f4 pins Black's knight on f6, making it more difficult for Black to quickly develop their pieces. By placing the bishop on f4, White also frees up the c1-square for their queen and allows the possibility of bringing the rook to d1. The move also prepares for future castling and offers potential tactical opportunities, such as sacrificing the bishop to create an open file for the rook. In sum, Bf4 is a useful move for White in terms of exerting pressure and setting up strategic possibilities.