Because the legitimate product is large and expensive, many pirates repackage the files and share "Monster Links" on torrent sites or forums. These are illegal downloads. They often contain broken files, malware, or missing interactive content.

Pick a weakness. Is it the Sicilian Defense? Watch the "Sicilian Structures" trainer. Is it rook endgames? Watch both Karsten Müller and Adrian Mikhalchishin’s endgame courses.

ChessBase occasionally sells this bundle directly on their website (usually during Black Friday, Christmas, or their annual "Big Sale"). It is a legitimate, single-user license. You get a unique download link and a serial number to unlock the videos.