Queen's Indian Defense: Fianchetto Variation, Sämisch Variation

The opening move d4, played by White, is a classic pawn move that controls the central squares of the board. By placing his pawn on d4, White aims to establish a strong pawn chain and gain control over the center of the board. The move also allows White to open up lines for his queen and bishop. It is an aggressive move that puts pressure on Black's position right from the start. The Queen's Indian Defense is a popular response to this opening move, and the Fianchetto and Sämisch Variations offer interesting lines of play for both sides.

The move Nf6, played by Black, develops the knight and prepares to challenge White's control over the center of the board. By placing the knight on f6, Black attacks the pawn on e4, which is currently defended only by White's pawn on d4. The knight also eyes the d5 square and prepares to potentially spring into action on the queenside or kingside. This move is a flexible response that allows Black to maintain the ability to choose from a variety of opening variations.

The move c4, played by White, is known as the Queen's Pawn Opening and is a strong attempt to control the center of the board. By advancing the pawn on c4, White aims to gain additional space and support his pawn on d4. This prepares a potential advance to d5, which would put great pressure on Black's position. The move also allows White's queen's bishop to enter the game via the c1-h6 diagonal. It is a popular opening move that attracts attention from strong players on both sides of the board.

In the Queen's Indian Defense: Fianchetto Variation, Sämisch Variation, the move e6, played by Black, aims to control the d5 square and prevent White from establishing a pawn on that square. This move also helps to provide support for Black's pawn on d5, which can become a strong central pawn if properly defended. By playing e6, Black also prepares to develop his pieces, particularly the light-squared bishop which can be placed on the long diagonal to control central squares. Finally, e6 creates a solid pawn structure which is flexible and can be used to launch counterattacks later in the game.

The move Nf3, played by White in response to e6, is a natural development move that prepares to castle kingside and also indirectly supports White's pawn on d4. By placing the knight on f3, White also prepares to control the e5 square and potentially put pressure on Black's pawn on d5. This move is particularly effective in the Queen's Indian Defense, as it helps to establish a strong pawn center and prepares for a variety of different lines of play. It is a flexible move that allows White to adapt to Black's responses.

The move b6, played by Black in response to Nf3, is a preparatory move that aims to develop Black's bishop on the long diagonal. This move allows the bishop to control important central squares and also helps to protect Black's pawn on e6. By placing the pawn on the b6 square, Black also prepares to fianchetto the bishop on b7, which can be a powerful attacking piece in the middle game. Finally, b6 helps to prevent White from putting pressure on the d5 square with a pawn on e4, as Black would be able to respond with the move d5. It is a flexible and versatile move that offers a range of strategic options for Black.

In the Queen's Indian Defense: Fianchetto Variation, Sämisch Variation, the move g3, played by White, is a key element of the Fianchetto system. By placing the pawn on g3, White prepares to fianchetto his king's bishop on g2, which provides strong control over the long diagonal from a2 to g8. The bishop on g2 also helps to cover important squares in the center of the board and allows for quick castling on the kingside. Additionally, g3 serves as a flexible defensive move, as it prepares to reinforce White's pawn structure on the kingside and provides a safe haven for the king. It is a solid and popular move that allows White to develop his pieces harmoniously and build a strong position.

The move Bb7, played by Black in response to g3, is a key element of the Fianchetto system. By placing the bishop on b7, Black completes his own pawn structure and provides strong control over the long diagonal from b7 to h1. The bishop on b7 also helps to cover important squares in the center of the board and supports Black's pawn on d5. Additionally, Bb7 serves as a flexible attacking move, as it prepares to put pressure on White's pawn structure on the kingside and potentially target the pawn on c4. It is a solid and popular move that allows Black to develop his pieces harmoniously and build a strong position while putting pressure on White's position.

The move Bg2, played by White, is the final piece of the Fianchetto system in the Queen's Indian Defense. By placing the bishop on g2, White completes his own pawn structure and provides strong control over the long diagonal from a2 to g8. The bishop on g2 also helps to cover important squares in the center of the board and allows for quick castling on the kingside. Additionally, Bg2 prepares to castle kingside and reinforces White's pawn structure on the kingside. It is a strong and flexible move that allows White to develop his pieces harmoniously and establish a solid position while putting pressure on Black's position as well.

In the Queen's Indian Defense: Fianchetto Variation, Sämisch Variation, the move c5 played by Black, aims to gain more space in the center of the board and prevent White's pawn on d4 from exerting too much control. This move also prepares to open lines for Black's queen's bishop to become more active in the game. By playing c5, Black also gains the ability to potentially capture White's pawn on d4 with the knight or pawn, which can lead to a favorable exchange of material. Additionally, c5 can be used to launch counterattacks on the queenside and disrupt White's pawn structure. It is a tactical and aggressive move that offers many strategic options for Black.