Alongside its latest releases, ChessBase's Summer Specials also include a selection of older Fritz Trainers, such as titles from Daniel King's long-running PowerPlay series and Karsten Müller's endgame courses. This raises an interesting question: can Fritz Trainers that are up to 20 years old still be used on modern computers, and how well have they stood the test of time? Jochen Schwarz, a club player from Bremen, revisited a number of these classic titles and also reveals his personal favourites among these old gems.