Philidor Defense: Philidor Countergambit, del Rio Attack

One of the main objectives of playing 1.e4 is to gain control over the center of the board. By occupying the e5-square, White hopes to place a pawn there in the near future and exert more control over central squares. The move 2.Nf3 also prepares for the pawn push to d4, which will further solidify White's central control. This aggressive strategy can create a strong attacking position and put Black on the defensive.

Playing e5 is a common response to White's opening move, 1.e4. By controlling the central d4 and f4 squares, Black aims to establish a strong foothold in the center of the board. The pawn on e5 also attacks White's pawn on e4, potentially forcing White to defend it or allowing Black to capture it and gain some material advantage. Additionally, the pawn push opens up diagonals for Black's pieces, opening up the possibility for developing the queen and bishop.

The move 2.Nf3 by White is a natural developing move that supports White's objective of gaining control over the center. The knight attacks Black's e5 pawn while reinforcing White's own pawn on e4. Nf3 also allows for the eventual pawn push to d4, further solidifying White's central control. Additionally, moving the knight early allows White to prepare for various tactics and positional maneuvers, such as the possibility of castling kingside and potentially attacking on the g-file.

In the Philidor Defense: Philidor Countergambit, del Rio Attack, Black plays d6 to support the e5 pawn, reinforcing control over the center. The pawn can now be securely defended by the queen's bishop, allowing for the potential development of the knight to f6. Additionally, d6 prepares for the pawn push to d5, leading to a more dynamic position with multiple pawn chains. The move also helps to prevent any potential knight jumps to e5 by White, which could disrupt Black's central control.

After the moves 1.e4 e5 2.Nf3 d6, White often plays d4, advancing the pawn to the center of the board. This move continues White's strategy of gaining control over central squares, and if Black captures the pawn with exd4, White can recapture with the queen's pawn giving the queen access to central squares and improving the development of the light-squared bishop. The pawn push also opens up lines for White's minor pieces, allowing for further development and potential attacks on Black's position. If Black does not capture the pawn, White will have a strong central pawn chain that restricts the mobility of Black's pieces.

In response to 1.e4 e5 2.Nf3 d6 3.d4, Black can consider playing f5, a counterattacking move that aims to undermine White's center and initiative. By advancing the f-pawn, Black gains additional control over the central e4 square and expands their pawn structure on the kingside. The move also discourages White's knight from the g5-square, which could disrupt Black's kingside pawn structure. However, playing f5 does leave a weakness on e6, which could be targeted by White's pieces, and potentially weaken Black's king position in the long term.

In the Philidor Defense: Philidor Countergambit, del Rio Attack, after 1.e4 e5 2.Nf3 d6 3.d4 f5, White can play dxe5, capturing the pawn in the center while opening up the diagonal for the queen. This move forces Black's hand, as either capturing back with the bishop (exd4) or the pawn (dxe5 dxe5) would give White additional central control. Capturing with the bishop would also expose the queen to attack after Qxd8+ Kxd8, allowing White to gain an advantage in material. The move also highlights the importance of developing pieces over pawns in the opening, as Black's early pawn advances allowed White to capitalize on the resulting weaknesses.

In response to 1.e4 e5 2.Nf3 d6 3.d4 f5 4.dxe5, Black can consider playing fxe4, recapturing the pawn in the center. This move allows Black to challenge White's control over the central d4 and e5 squares, and puts pressure on White to maintain a strong pawn chain. Capturing with the pawn on e4 can also limit the mobility of White's pieces, particularly the queen and knight. However, the move does leave the f5-pawn isolated, potentially exposing it to attack later in the game. The move by Black also creates an open e-file, which could be used by both sides to attack.

After the moves 1.e4 e5 2.Nf3 d6 3.d4 f5 4.dxe5 fxe4, White can consider playing Ng5, attacking the knight on f6 and potentially gaining control over the h6-square. The move may also threaten the pawn on e7, putting pressure on the f8-square and potentially disrupting Black's king-side defense. Additionally, the knight on g5 may be able to jump to f7, forcing Black to make uncomfortable defensive moves. However, White's knight may become overextended and potentially vulnerable to attack from Black's pawns or minor pieces. Capturing the knight on f6 may also force Black's queen to recapture, temporarily moving the queen away from the defense of Black's king-side.

In the Philidor Defense: Philidor Countergambit, del Rio Attack, after 1.e4 e5 2.Nf3 d6 3.d4 f5 4.dxe5 fxe4 5.Ng5, Black can play d5, striking back at White's center and potentially disrupting White's pawn chain. This move also attacks the knight on g5, forcing it to retreat and potentially giving Black control over the f4-square. The move d5 also opens lines for Black's bishop on c8, potentially leading to further pawn moves and allowing Black to ramp up the pressure on White's position. However, the move does leave the e6-pawn weak, potentially exposing Black's king-side defense to tactical threats.

After 1.e4 e5 2.Nf3 d6 3.d4 f5 4.dxe5 fxe4 5.Ng5 d5, White may consider playing e6, breaking open Black's pawn structure and potentially weakening their king-side defense. The move attacks Black's knight on d5, forcing it to move and allowing White to potentially gain control over the e5-square and central d4-square. The move can also expose weaknesses in Black's pawn chain, such as the pawn on e6 becoming an isolated pawn and potentially subject to attack by White's pieces. However, playing e6 also opens up lines for Black's queen, bishop and king rook. This move may also potentially weaken White's pawn structure around their own king, giving Black the chance to have counterattacks.