Chess Middlegame III, part of the Chess King Learn series, offers a comprehensive course by GM Alexander Kalinin focusing on middlegame strategies and tactics. The program covers various openings including Sicilian defense, Scandinavian defense, Grünfeld defense, Queen's Gambit Accepted, Reti opening, and more. It acts as a coach, providing tasks, hints, and explanations to enhance your chess skills. With interactive theoretical lessons and a structured table of contents, the program caters to players of all levels. It also tracks player ratings, offers a test mode, allows bookmarking of exercises, and works offline. The free version includes lessons on Petrov defense, Ruy Lopez, Scandinavian defense, Sicilian defense, Queen's gambit accepted, Grünfeld defense, Queen's pawn opening, Réti opening, and King's fianchetto opening.