Spanish for Conquerors - A strategic white repertoire with 6.d3

The Spanish is the most popular reply to 1.e4 e5. If White chooses the main variations, it is a great disadvantage that Black can determine the course of the game: White is threatened by the sharp Marshall Gambit, but also positional variations such as the Breyer or Chigorin system. With 6.d3 we deprive Black of the luxury of being able to choose his own favorite variation in the Spanish!