| --- |
| license: cc0-1.0 |
| pretty_name: Lichess Standard Rated Games |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: data/**/train-* |
| tags: |
| - chess |
| - games |
| - game |
| - lichess |
| - tabular |
| size_categories: |
| - 1B<n<10B |
| --- |
| |
| > [!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](https://lichess.org), updated monthly from the [database dumps](https://database.lichess.org/#standard_games). |
|
|
| This version of the data is meant for data analysis. If you need PGN files you can find those [here](https://database.lichess.org/#standard_games). That said, once you have a subset of interest, it is trivial to convert it back to PGN as shown in the [Dataset Usage](#dataset-usage) section. |
|
|
| This dataset is hive-partitioned into multiple parquet files on two keys: `year` and `month`: |
|
|
| ```bash |
| . |
| ├── data |
| │ └── year=2015 |
| │ ├── month=01 |
| │ │ ├── train-00000-of-00003.parquet |
| │ │ ├── train-00001-of-00003.parquet |
| │ │ └── train-00002-of-00003.parquet |
| │ ├── month=02 |
| │ │ ├── train-00000-of-00003.parquet |
| │ │ ├── train-00001-of-00003.parquet |
| │ │ └── train-00002-of-00003.parquet |
| │ ├── ... |
| ``` |
|
|
| ### Dataset Usage |
|
|
| <!-- Using the `datasets` library: |
|
|
| ```python |
| from datasets import load_dataset |
| dset = load_dataset("Lichess/chess-evaluations", split="train") |
| ``` |
| Using the `polars` library: |
|
|
| Using DuckDB: |
|
|
| Using `python-chess`: --> |
|
|
|
|
| ## Dataset Details |
|
|
| ### Dataset Sample |
|
|
| <!-- One row of the dataset looks like this: |
|
|
| ```python |
| { |
| "Event":, |
| "Site":, |
| } |
| ``` --> |
|
|
| ### Dataset Fields |
|
|
| <!-- Every row of the dataset contains the following fields: |
|
|
| - **`Event`**: `string`, |
| - **`Site`**: `string`, --> |
|
|
| ### Notes |
|
|
| - About 6% of the games include Stockfish analysis evaluations: [%eval 2.35] (235 centipawn advantage), [%eval #-4] (getting mated in 4), always from White's point of view. |
|
|
| - The WhiteElo and BlackElo tags contain Glicko2 ratings. |
|
|
| - The `movetext` column contains clock information as PGN %clk comments since April 2017. |
|
|
| - The schema doesn't include the `Date` header, typically part of the [Seven Tag Roster](https://en.wikipedia.org/wiki/Portable_Game_Notation#Seven_Tag_Roster) as we deemed the `UTCDate` field to be enough. |
|
|
| - A future version of the data will include the addition of a `UCI` column containing the corresponding moves in [UCI format](https://en.wikipedia.org/wiki/Universal_Chess_Interface). |
