lichess
Datasets
All datasets matching “lichess”standard-chess-games
[!CAUTION]
This dataset is still a work in progress and some breaking changes might occur.
Lichess Rated Standard Chess Games Dataset
Dataset Description
6,771,826,271 standard rated games, played on lichess.org, updated monthly from the database dumps.
This version of the data is meant for data analysis. If you need PGN files you can find those here. That said, once you have a subset of interest, it is trivial to convert it back to PGN as shown in the Dataset Usage… See the full description on the dataset page: https://huggingface.co/datasets/Lichess/standard-chess-games.lichess-elo-binned-2021-and-2024lichess_elo_binnedaix-lichess-database
Aix-compatible Lichess database
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.lichess-uci
Dataset Card for Lichess.org UCI Dataset
Description
The Lichess.org database has been converted to UCI format and uploaded here.
This dataset groups games according to the year and month (yyyymm format) the games took place.
Dataset Structure
Each record in the dataset has the following structure:
{
"Site": "abcd1234",
"Event": "Rated Blitz game",
"White": "player1",
"Black": "player2",
"Result": "1-0",
"UTCDate": "2023-05-21",
"UTCTime":… See the full description on the dataset page: https://huggingface.co/datasets/austindavis/lichess-uci.chess-position-evaluations
Dataset Card for the Lichess Evaluations dataset
Dataset Description
394,669,566 chess positions evaluated with Stockfish at various depths and node count. Produced by, and for, the Lichess analysis board, running various flavours of Stockfish within user browsers. This version of the dataset is a de-normalized version of the original dataset and contains 957,860,115 rows.
This dataset is updated monthly, and was last updated on July 8th, 2026.… See the full description on the dataset page: https://huggingface.co/datasets/Lichess/chess-position-evaluations.