| license: cc0-1.0 | |
| configs: | |
| - config_name: default | |
| data_files: | |
| - split: train | |
| path: data/**/train-* | |
| > [!CAUTION] | |
| > This dataset is still a work in progress and some breaking changes might occur. | |
| ## Note | |
| The `FEN` column has 961 unique values instead of the expected 960, because some rematches were [recorded with invalid castling rights in their starting FEN](https://github.com/lichess-org/database/issues/54) in November 2023. | |