Kostya Kavutskiy is the latest "Fritz Trainer" to join the ChessBase team of authors. An International Master, renowned FIDE trainer and chess author, he made his ChessBase debut with the video course "Mastering Calculation" and has already followed it up with "The Fundamentals of Positional Play". Jochen Schwarz, a club player from Bremen and a connoisseur of the FritzTrainer series, took a close look at both courses and also examined how they compare with similar courses by established authors such as Robert Ris and Ivan Sokolov.