This dataset is a condensed version of the Lichess database.
It only includes games for which Stockfish evaluations were available.
Currently, the dataset contains the entire year 2023, which consists of >100M games and >2B positions.
Games are stored in a format that is much faster to process than the original PGN data.
In the following, I explain the data format… See the full description on the dataset page:
https://huggingface.co/datasets/mauricett/lichess_sf.