D00-D99

The Orthodox Defense. Black follows the most traditional path of defense, focusing on holding the center at all costs.

The Orthodox Defense with 7.Qc2. White puts pressure on the c-file and prepares to open the center, forcing Black to react accurately.

Theoretical refinements of the 7.Qc2 Orthodox. Both sides engage in a slow, high-level maneuvering game.

The Orthodox Defense with 7.Rc1. White develops the rook to the semi-open file early, anticipating the opening of the queenside.

The Orthodox Defense with 7.Rc1 c6. Both sides build very solid structures, leading to a long and technical positional struggle.

The main line of the 7.Rc1 Orthodox. A classic battleground of the mid-20th century, requiring deep strategic understanding.

The Orthodox Defense with 8.Bd3. White develops the bishop to its most active square before deciding on the final central breakthrough.

The Capablanca Maneuver. Black simplifies the position by trading knights on d5. It is a blueprint for achieving a solid and equal game.

Theoretical extensions of the Capablanca Maneuver. Both sides enter a technical endgame or middle-game with very slight imbalances.

The final theoretical refinement of the Orthodox Defense. It represents the limit of classical strategic play in the Queen's Gambit.