The author deals with the strategy of the middle game in positions typical for the Queen's Gambit - more precisely, the Exchange Variation with White pawns on e3 and d4 against Black pawns on c6 and d5 - the so-called Carlsbad structure. The book contains 120 examples from practical games, which readers can analyse themselves or go directly to the detailed analysis and explanation in the second part of the book. 3 pictures. Further information about the book and a sample are available at schachversand-ullrich.de.