Queen's Gambit Declined: Harrwitz Attack (variation 8)

This opening is a solid defense where Black declines the gambit and focuses on developing their pieces efficiently.

In this variation, White aims to control the center with their pawns and pieces, while Black opts for a solid pawn structure and piece development. The move c5 by Black challenges White's central pawn on d4, leading to exchanges in the center. The move Qa5 puts pressure on White's c3 knight and a3 pawn, forcing White to make a decision on how to defend these pieces. Castling kingside by both players allows for the rooks to connect and potentially bring them into the game via the open d-file. The move Qc2 by White prepares for further development and potentially queenside castling. Black can choose to continue with moves like Nc6 or b6, aiming to further develop their pieces and prepare for the middlegame. Overall, this variation leads to a balanced position where both sides have their chances for a successful middlegame plan.