---
license: cc0-1.0
configs:
- config_name: default
  data_files:
  - split: train
    path: data/**/train-*
tags:
- chess
- chess960
- lichess
- game
- games
- tabular
pretty_name: Rated Chess960 Games
size_categories:
- 10M<n<100M
---

> [!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.