The "Chessable PGN Collection" as of July 15, 2023, specifically referencing a "t top" or "top" list, typically refers to community-curated archives of Portable Game Notation (PGN) files for popular Chessable courses.
As of mid-July 2023, Chessable’s ecosystem for PGNs (specifically through their "Course Creator" and imported repertoires) had matured significantly. The "top" collections were generally defined by the depth of engine-checked analysis and the integration of "Bookshelf" features (dark mode, board styles) released earlier in the year. chessable pgn collection as on 15th july 2023 t top