English Opening: King's English Variation, Troger Defense

In the English Opening: King's English Variation, Troger Defense, White starts the game with the move c4. This move controls the d5 square and prepares to develop the knight to c3. It also creates a pawn chain with the d4 square as its base, which can provide a strong central control. The English Opening is a flexible opening as it allows White to choose from a variety of setups depending on Black's response. The idea is to maintain a control of the center and create a favorable position for White's pieces.

Black plays e5 in response to White's c4 to immediately start putting pressure on the center of the board. By playing e5, Black gains control of the d4 square and challenges White's pawn chain. It also creates opportunities for the development of the knight on f6 and potentially the bishop on c5. This move can also help Black equalize the position by grabbing space and restricting White's options. However, playing e5 early can also sometimes lead to weaknesses in Black's pawn structure if not carefully played.

White plays Nc3 as a developing move to bring one of the knights into the game. Nc3 controls the d5 square, which is a key central square on the board. By playing Nc3, White also prepares to castle kingside and connect the rooks. The knight on c3 can potentially support the advance of pawns on e4 or d4 in the future. Furthermore, Nc3 also allows White to potentially play d4 and challenge Black's pawn center control.

In the English Opening: King's English Variation, Troger Defense, Black decides to develop their knight on c6 in response to White's Nc3 move. Black's knight on c6 supports the pawn on d5 and prepares to control the d4 square. Additionally, it allows Black to gain space in the center of the board and can support the advance of pawns on either d4 or b6. The knight on c6 can also potentially threaten White's pawn on e5 or support the bishop on g4 attacking the knight on f3. In sum, by playing Nc6, Black continues to develop their pieces and prepares for future tactical opportunities.

White plays g3 in the English Opening after developing both knights to prepare their bishop to fianchetto on g2. The move g3 also helps to control the f4 square, reducing Black's knight's options. Additionally, it provides support for a future pawn play on f4, which can help to gain central space. By playing g3, White also prepares to castle kingside, further securing the safety of their king. Finally, g3 can also prevent potential knight forks on White's pieces, making it easier for their queen and bishop to operate. In sum, g3 is an important move in opening preparation in the English Opening.

Black plays d6 in the English Opening as a flexible move to control the center and prepare for the development of their light-squared bishop. d6 also creates an escape square for the knight on c6 in case of future tactical maneuvers by White. Additionally, it supports the pawn on e5 and prepares to potentially advance it further. d6 can also help Black create a pawn triangle with the pawns on e5, d6, and c5, which can provide a stable pawn structure. By playing d6, Black also keeps their options open and prevents potential attacks on their position by White's bishop on g2.

In the English Opening: King's English Variation, Troger Defense, the move Bg2 allows White to fianchetto their bishop on the long diagonal with the intention of controlling the a1-h8 diagonal and potentially target Black's weak squares on the queenside. Bg2 also helps to support the pawn chain on d4 and e5 and provides more support to castle kingside. Furthermore, Bg2 can also prepare for tactics involving the exchange of a knight on f3 and winning a pawn on e5. By playing Bg2, White takes advantage of the weakened dark squares in Black's position and can potentially threaten their king's safety if left unattended. In sum, Bg2 is an essential move in the English Opening as it allows White to create a solid dynamic position.

Black plays Be6 in the English Opening to develop their light-squared bishop and put more pressure on the central squares. Be6 also eyes the knight on c3, which can be captured to double White's pawns if White chooses to recapture with the b-pawn. Also, Be6 supports the pawn on d6, increasing its solidity and controlling the e5 square. Additionally, the bishop on e6 exerts pressure along the diagonal b1-h7, potentially limiting White's options and attacking weak spots in White's position. In sum, by playing Be6, Black continues to develop their pieces and prepares their position for any future tactics and attacks.