This dataset contains the Lichess database of 7+ billion chess games, but in a format queryable using Aix, with the aixchess extension for DuckDB.
Three compression levels (Low, Medium, and High) are offered for the chess game encoding, enabling a trade-off between decoding speed and size. The Parquet files themselves are all zstd-compressed at level 19.
Generated using pgn-to-aix.
See my blog post for more details.
Example DuckDB commands:
INSTALL… See the full description on the dataset page:
https://huggingface.co/datasets/thomasd1/aix-lichess-database.
