Old Indian Defense: Tartakower-Indian

Chess has many openings, each with their own strengths and weaknesses. In the opening known as Old Indian Defense, White plays their pawn to d4 on the second move. This move is played in order to take control of the center of the board, which is a key position in any game of chess. By controlling the center, White can gain an advantage and dictate the tempo of the game. The d4 move also prepares for the development of White's other pieces and opens up space for their queen and bishop to move. In sum, this move sets White up for a powerful game if played correctly.

In response to White's opening move of d4, Black plays their knight to f6. This move mirrors White's control of the center of the board and aims to contest it. Additionally, the knight on f6 attacks White's pawn on e4, which is a critical square in the center. By placing their knight on f6, Black is preparing to develop their other pieces and protect their own pawns. The move also sets the stage for Black's typical response to the Old Indian Defense, which involves placing their bishop on g4 to pin White's knight on f3.

After Black's move of Nf6, White responds by playing c4. This move continues White's aim of controlling the center of the board and prepares to develop their knight to c3 and bishop to the square of d3 or e2. This will allow White to attack Black's knight on f6 which is an important piece in Black's defense. Additionally, the c4 pawn move opens up lines for the queen and bishop to move and control important squares on the board. By controlling the center and preparing for further development, White is setting themselves up for a strong and dynamic game.

In the Old Indian Defense: Tartakower-Indian, Black responds to White's c4 move with d6. This move supports Black's knight on f6 and prepares for the pawn on e7 to be developed to e6, which will allow the bishop to be developed and defend Black's central pawns. d6 also prepares for Black to control the center of the board with pawns on d6 and e6. Moreover, this move can create space for the queen to be developed to e7, which can support tactical play and put pressure on White's central pawns. By playing d6, Black is laying the groundwork for a solid defense while also keeping an eye on opportunities for attack.

After Black's move of d6, White aims to continue their development by playing Nf3. This move prepares for the knight to be developed to g5, where it can put pressure on Black's pawn structure. The knight on f3 also eyeing control over the d4 square and helps support White's central pawn. Additionally, Nf3 prepares for the bishop to be developed to e3 or g5, which can be used to disrupt Black's king position. By developing their pieces quickly and efficiently, White is setting themselves up for a dynamic game with potential for rapid mobilization and attack.

With White's third move of Nf3, Black can respond by playing Bg4. This move pins White's knight on f3 and threatens to capture it if it moves. In the Old Indian Defense: Tartakower-Indian, this move is frequently used to pressure White's center and disrupt their pawn structure. The bishop on g4 also eyes the h3 pawn, which can be useful for harassment later on in the game. Moreover, Bg4 typically supports Black's plan of controlling the center of the board with pawns on d6 and e5. By playing Bg4, Black is setting up for a strategic game with potential for tactical opportunities.