: Each puzzle entry includes the starting FEN, the move sequence to solve it, the puzzle's rating, and "Themes" tags (e.g., fork, pin, mate in 2).
: These are designed for offline training or for use in external chess software (like Scid vs. PC) where users want to drill tactics that arise from their own opening repertoire. Where to Find the Data Lichess Puzzles By Eco zip
These zip files are typically PGN (Portable Game Notation) collections structured so you can practice tactics specifically related to certain openings: : Each puzzle entry includes the starting FEN,