Chessable does not provide raw, external PGN downloads for its proprietary courses to protect intellectual property. However, purchasing the course gives you access to their interactive MoveTrainer technology, which functions as a living, trainable PGN.
If you are looking to download standard calculation files to load into a chess GUI (like ChessBase, Fritz, or Lichess), use these methods: Download Calculation Workbook for Tournament Players pgn
A video course and training pack curated to teach players a concrete calculation formula similar to strong Grandmasters. Chessable does not provide raw, external PGN downloads
Websites like Modern Chess often include standalone PGN downloads with the purchase of their calculation and endgame courses. Websites like Modern Chess often include standalone PGN
1. Calculation: A Workbook for Tournament Players (CM Azel Chua)
If you want to create your own workbook, you can download a master tournament file from a database and use software like ChessBase to run a tactical analysis that isolates critical calculation moments.
2. Chess Calculation Workbook / Grandmaster Training Camp (GM Sam Shankland)