austindavis/lichess_uci

Dataset Card for Lichess.org Database in UCI format

Dataset Description

Dataset Summary

The Lichess.org database has been converted to UCI format, making it easier to analyze and interpret chess games. The moves configuration captures the sequence of moves using UCI notation, and the headers configuration provides comprehensive metadata for each game, enabling detailed statistical and strategic analysis. The data is subset based on the year and month (yyyymm format) the games took place.

Supported Tasks and Leaderboards

This dataset supports tasks related to chess game analysis, including move prediction, game outcome prediction, performance analysis, and opening strategy evaluation. There are no formal leaderboards associated with this dataset.

Dataset Structure

Data Instances

An example from the moves configuration:

{
  "site": "abcd1234",
  "transcript": "e2e4 e7e5 g1f3 b8c6"
}

An example from the headers configuration:

{
  "event": "Rated Blitz game",
  "site": "abcd1234",
  "white": "player1",
  "black": "player2",
  "result": "1-0",
  "utcdate": "2023-05-21",
  "utctime": "13:45:00",
  "whiteelo": 1500,
  "blackelo": 1400,
  "whiteratingdiff": 10,
  "blackratingdiff": -10,
  "eco": "C50",
  "opening": "Italian Game",
  "timecontrol": "300+0",
  "termination": "Normal"
}

Data Fields

Moves Configuration:

• site: string, unique identifier for the game. Replays can be viewed by navigating to https://lichess.org/<site>
• transcript: string, sequence of moves in UCI format.

Headers Configuration:

• event: string, type of event.
• site: string, unique identifier for the game.
• white: string, white player.
• black: string, black player.
• result: string, game result.
• utcdate: date32, date of the game.
• utctime: time64[us], time of the game.
• whiteelo: int64, ELO rating of the white player.
• blackelo: int64, ELO rating of the black player.
• whiteratingdiff: float64, rating change for the white player.
• blackratingdiff: float64, rating change for the black player.
• eco: string, ECO code of the opening.
• opening: string, name of the opening.
• timecontrol: string, time control format.
• termination: string, reason for game termination.

Data Splits

The dataset is divided into monthly splits based on the year and month (yyyymm format). Each split contains both moves and headers configurations.

Dataset Creation

Curation Rationale

The dataset was curated to facilitate research and analysis that use chess games, providing both move sequences and comprehensive metadata.

Source Data

Initial Data Collection and Normalization

The data was collected from the Lichess.org open database, converted from PGN format to UCI format, and organized into moves and headers configurations.

Who are the source data producers?

The source data comes from games played on Lichess.org, an online platform where users from around the world play chess. This database does not distinguish between human-and bot-played games. However, it's reasonable to assume games played before April 2018 were overwhelmingly played by human players since Lichess.org released its bot api on April 1st, 2018.

Annotations

Annotation process

The annotations include metadata such as player ELO ratings, game outcomes, and dates, which were extracted from the original PGN files and normalized into a structured format.

Who are the annotators?

The annotations were generated by the Lichess.org platform and curated by the dataset creators.

Personal and Sensitive Information

The dataset does not contain any personal or sensitive information.

Considerations for Using the Data

Social Impact of Dataset

The dataset can be used to improve chess engines, develop training tools for players, and conduct research in game theory and artificial intelligence.

Discussion of Biases

The dataset may have biases related to the demographics of Lichess.org users, such as skill level distribution and regional representation.

Other Known Limitations

The dataset is limited to games played on Lichess.org and may not represent the broader chess-playing population.

Additional Information

Dataset Curators

The dataset was curated by the Lichess.org team and contributors.

Licensing Information

The dataset is available under the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license.

Citation Information

If you use this dataset, please cite it as follows:

@misc{lichess_uci,
  author = {Davis, Austin L.},
  title = {Lichess.org Database in UCI format},
  year = {2023},
  howpublished = {\url{https://database.lichess.org/}},
}

Contributions

Thanks to @austinleedavis for adding this dataset.--- language: - en size_categories: - 1B<n<10B source_datasets: - database.lichess.org task_categories: - other paperswithcode_id: lichess_uci pretty_name: Lichess.org Database in UCI format tags: - chess - UCI - Lichess dataset_info: - config_name: 201301-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 20700133 num_examples: 121332 download_size: 6335452 dataset_size: 20700133 - config_name: 201301-moves features: - name: site dtype: string - name: transcript dtype: string splits: - name: train num_bytes: 42454117.656856485 num_examples: 120133 download_size: 992204415449 dataset_size: 1636203333850.0193 - config_name: 201302-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 21155456 num_examples: 123961 download_size: 6487839 dataset_size: 21155456 - config_name: 201303-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 27026323 num_examples: 158635 download_size: 8300668 dataset_size: 27026323 - config_name: 201304-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 27075305 num_examples: 157871 download_size: 8357025 dataset_size: 27075305 - config_name: 201305-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 30787801 num_examples: 179550 download_size: 9499827 dataset_size: 30787801 - config_name: 201306-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 38460608 num_examples: 224679 download_size: 12011278 dataset_size: 38460608 - config_name: 201307-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 50175383 num_examples: 293459 download_size: 15746824 dataset_size: 50175383 - config_name: 201308-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 55757812 num_examples: 325525 download_size: 17532132 dataset_size: 55757812 - config_name: 201309-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 55675760 num_examples: 325098 download_size: 17609637 dataset_size: 55675760 - config_name: 201310-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 70482274 num_examples: 411039 download_size: 22045781 dataset_size: 70482274 - config_name: 201312-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: date32 - name: utctime dtype: time64[us] - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 99283116 num_examples: 578262 download_size: 31618717 dataset_size: 99283116 - config_name: 201409-headers features: - name: event dtype: string - name: site dtype: string - name: white dtype: string - name: black dtype: string - name: result dtype: string - name: utcdate dtype: string - name: utctime dtype: string - name: whiteelo dtype: int64 - name: blackelo dtype: int64 - name: whiteratingdiff dtype: float64 - name: blackratingdiff dtype: float64 - name: eco dtype: string - name: opening dtype: string - name: timecontrol dtype: string - name: termination dtype: string splits: - name: train num_bytes: 189380199 num_examples: 1000056 download_size: 55076845 dataset_size: 189380199 description: '"The dataset contains games from the Lichess.org open database converted from PGN format to UCI format. It is divided into two main configurations: moves and headers. The moves configuration includes a UUID called site and the UCI moves in a column called transcript, while the headers configuration includes metadata such as player ELO ratings, game outcome, and dates. The data is subset based on the year and month (yyyymm format)." ' configs: - config_name: 201301-headers data_files: - split: train path: headers/201301/train-* - config_name: 201301-moves data_files: - split: train path: data/201301-* default: true - config_name: 201302-headers data_files: - split: train path: headers/201302/train-* - config_name: 201302-moves data_files: - split: train path: data/201302-* - config_name: 201303-headers data_files: - split: train path: headers/201303/train-* - config_name: 201303-moves data_files: - split: train path: data/201303-* - config_name: 201304-headers data_files: - split: train path: headers/201304/train-* - config_name: 201304-moves data_files: - split: train path: data/201304-* - config_name: 201305-headers data_files: - split: train path: headers/201305/train-* - config_name: 201305-moves data_files: - split: train path: data/201305-* - config_name: 201306-headers data_files: - split: train path: headers/201306/train-* - config_name: 201306-moves data_files: - split: train path: data/201306-* - config_name: 201307-headers data_files: - split: train path: headers/201307/train-* - config_name: 201307-moves data_files: - split: train path: data/201307-* - config_name: 201308-headers data_files: - split: train path: headers/201308/train-* - config_name: 201308-moves data_files: - split: train path: data/201308-* - config_name: 201309-headers data_files: - split: train path: headers/201309/train-* - config_name: 201309-moves data_files: - split: train path: data/201309-* - config_name: 201310-headers data_files: - split: train path: headers/201310/train-* - config_name: 201310-moves data_files: - split: train path: data/201310-* - config_name: 201311-moves data_files: - split: train path: data/201311-* - config_name: 201312-headers data_files: - split: train path: headers/201312/train-* - config_name: 201312-moves data_files: - split: train path: data/201312-* - config_name: 201401-moves data_files: - split: train path: data/201401-* - config_name: 201402-moves data_files: - split: train path: data/201402-* - config_name: 201403-moves data_files: - split: train path: data/201403-* - config_name: 201404-moves data_files: - split: train path: data/201404-* - config_name: 201405-moves data_files: - split: train path: data/201405-* - config_name: 201406-moves data_files: - split: train path: data/201406-* - config_name: 201407-moves data_files: - split: train path: data/201407-* - config_name: 201408-moves data_files: - split: train path: data/201408-* - config_name: 201409-headers data_files: - split: train path: headers/201409/train-* - config_name: 201409-moves data_files: - split: train path: data/201409-* - config_name: 201410-moves data_files: - split: train path: data/201410-* - config_name: 201411-moves data_files: - split: train path: data/201411-* - config_name: 201412-moves data_files: - split: train path: data/201412-* - config_name: 201501-moves data_files: - split: train path: data/201501-* - config_name: 201502-moves data_files: - split: train path: data/201502-* - config_name: 201503-moves data_files: - split: train path: data/201503-* - config_name: 201504-moves data_files: - split: train path: data/201504-* - config_name: 201505-moves data_files: - split: train path: data/201505-* - config_name: 201506-moves data_files: - split: train path: data/201506-* - config_name: 201507-moves data_files: - split: train path: data/201507-* - config_name: 201508-moves data_files: - split: train path: data/201508-* - config_name: 201509-moves data_files: - split: train path: data/201509-* - config_name: 201510-moves data_files: - split: train path: data/201510-* - config_name: 201511-moves data_files: - split: train path: data/201511-* - config_name: 201512-moves data_files: - split: train path: data/201512-* - config_name: 201601-moves data_files: - split: train path: data/201601-* - config_name: 201602-moves data_files: - split: train path: data/201602-* - config_name: 201603-moves data_files: - split: train path: data/201603-* - config_name: 201604-moves data_files: - split: train path: data/201604-* - config_name: 201605-moves data_files: - split: train path: data/201605-* - config_name: 201606-moves data_files: - split: train path: data/201606-* - config_name: 201607-moves data_files: - split: train path: data/201607-* - config_name: 201608-moves data_files: - split: train path: data/201608-* - config_name: 201609-moves data_files: - split: train path: data/201609-* - config_name: 201610-moves data_files: - split: train path: data/201610-* - config_name: 201611-moves data_files: - split: train path: data/201611-* - config_name: 201612-moves data_files: - split: train path: data/201612-* - config_name: 201701-moves data_files: - split: train path: data/201701-* - config_name: 201702-moves data_files: - split: train path: data/201702-* - config_name: 201703-moves data_files: - split: train path: data/201703-* - config_name: 201704-moves data_files: - split: train path: data/201704-* - config_name: 201705-moves data_files: - split: train path: data/201705-* - config_name: 201706-moves data_files: - split: train path: data/201706-* - config_name: 201707-moves data_files: - split: train path: data/201707-* - config_name: 201708-moves data_files: - split: train path: data/201708-* - config_name: 201709-moves data_files: - split: train path: data/201709-* - config_name: 201710-moves data_files: - split: train path: data/201710-* - config_name: 201711-moves data_files: - split: train path: data/201711-* - config_name: 201712-moves data_files: - split: train path: data/201712-* - config_name: 201801-moves data_files: - split: train path: data/201801-* - config_name: 201802-moves data_files: - split: train path: data/201802-* - config_name: 201803-moves data_files: - split: train path: data/201803-* - config_name: 201804-moves data_files: - split: train path: data/201804-* - config_name: 201805-moves data_files: - split: train path: data/201805-* - config_name: 201806-moves data_files: - split: train path: data/201806-* - config_name: 201807-moves data_files: - split: train path: data/201807-* - config_name: 201808-moves data_files: - split: train path: data/201808-* - config_name: 201809-moves data_files: - split: train path: data/201809-* - config_name: 201810-moves data_files: - split: train path: data/201810-* - config_name: 201811-moves data_files: - split: train path: data/201811-* - config_name: 201812-moves data_files: - split: train path: data/201812-* - config_name: 201901-moves data_files: - split: train path: data/201901-* - config_name: 201902-moves data_files: - split: train path: data/201902-* - config_name: 201903-moves data_files: - split: train path: data/201903-* - config_name: 201904-moves data_files: - split: train path: data/201904-* - config_name: 201905-moves data_files: - split: train path: data/201905-* - config_name: 201906-moves data_files: - split: train path: data/201906-* - config_name: 201907-moves data_files: - split: train path: data/201907-* - config_name: 201908-moves data_files: - split: train path: data/201908-* - config_name: 201909-moves data_files: - split: train path: data/201909-* - config_name: 201910-moves data_files: - split: train path: data/201910-* - config_name: 201911-moves data_files: - split: train path: data/201911-* - config_name: 201912-moves data_files: - split: train path: data/201912-* - config_name: 202001-moves data_files: - split: train path: data/202001-* - config_name: 202002-moves data_files: - split: train path: data/202002-* - config_name: 202003-moves data_files: - split: train path: data/202003-* - config_name: 202004-moves data_files: - split: train path: data/202004-* - config_name: 202005-moves data_files: - split: train path: data/202005-* - config_name: 202006-moves data_files: - split: train path: data/202006-* - config_name: 202007-moves data_files: - split: train path: data/202007-* - config_name: 202008-moves data_files: - split: train path: data/202008-* - config_name: 202009-moves data_files: - split: train path: data/202009-* - config_name: 202010-moves data_files: - split: train path: data/202010-* - config_name: 202011-moves data_files: - split: train path: data/202011-* - config_name: 202012-moves data_files: - split: train path: data/202012-* - config_name: 202101-moves data_files: - split: train path: data/202101-* - config_name: 202102-moves data_files: - split: train path: data/202102-* - config_name: 202103-moves data_files: - split: train path: data/202103-* - config_name: 202104-moves data_files: - split: train path: data/202104-* - config_name: 202105-moves data_files: - split: train path: data/202105-* - config_name: 202106-moves data_files: - split: train path: data/202106-* - config_name: 202107-moves data_files: - split: train path: data/202107-* - config_name: 202108-moves data_files: - split: train path: data/202108-* - config_name: 202109-moves data_files: - split: train path: data/202109-* - config_name: 202110-moves data_files: - split: train path: data/202110-* - config_name: 202111-moves data_files: - split: train path: data/202111-* - config_name: 202112-moves data_files: - split: train path: data/202112-* - config_name: 202201-moves data_files: - split: train path: data/202201-* - config_name: 202202-moves data_files: - split: train path: data/202202-* - config_name: 202203-moves data_files: - split: train path: data/202203-* - config_name: 202204-moves data_files: - split: train path: data/202204-* - config_name: 202205-moves data_files: - split: train path: data/202205-* - config_name: 202206-moves data_files: - split: train path: data/202206-* - config_name: 202207-moves data_files: - split: train path: data/202207-* - config_name: 202208-moves data_files: - split: train path: data/202208-* - config_name: 202209-moves data_files: - split: train path: data/202209-* - config_name: 202210-moves data_files: - split: train path: data/202210-* - config_name: 202211-moves data_files: - split: train path: data/202211-* - config_name: 202212-moves data_files: - split: train path: data/202212-* - config_name: 202301-moves data_files: - split: train path: data/202301-* - config_name: 202302-moves data_files: - split: train path: data/202302-* - config_name: 202303-moves data_files: - split: train path: data/202303-* - config_name: 202304-moves data_files: - split: train path: data/202304-* - config_name: 202305-moves data_files: - split: train path: data/202305-* - config_name: 202306-moves data_files: - split: train path: data/202306-* - config_name: 202307-moves data_files: - split: train path: data/202307-* - config_name: 202308-moves data_files: - split: train path: data/202308-* - config_name: 202309-moves data_files: - split: train path: data/202309-* - config_name: 202310-moves data_files: - split: train path: data/202310-* - config_name: 202311-moves data_files: - split: train path: data/202311-* - config_name: 202312-moves data_files: - split: train path: data/202312-* - config_name: 202401-moves data_files: - split: train path: data/202401-* - config_name: 202402-moves data_files: - split: train path: data/202402-* example: moves: site: xxxxxxx transcript: e2e4 e7e5 g1f3 b8c6 headers: event: Rated Blitz game site: xxxxxxx white: player1 black: player2 result: 1-0 utcdate: '2023-05-21' utctime: '13:45:00' whiteelo: 1500 blackelo: 1400 whiteratingdiff: 10 blackratingdiff: -10 eco: C50 opening: Italian Game timecontrol: 300+0 termination: Normal

Dataset Card for Lichess.org Database in UCI format

Table of Contents

• Table of Contents
• Dataset Description
  • Dataset Summary
  • Supported Tasks and Leaderboards
• Dataset Structure
  • Data Instances
  • Data Fields
  • Data Splits
• Dataset Creation
  • Curation Rationale
  • Source Data
  • Annotations
  • Personal and Sensitive Information
• Considerations for Using the Data
  • Social Impact of Dataset
  • Discussion of Biases
  • Other Known Limitations
• Additional Information
  • Dataset Curators
  • Licensing Information
  • Citation Information
  • Contributions

Dataset Description

Dataset Summary

The Lichess.org database has been converted to UCI format, making it easier to analyze and interpret chess games. The moves configuration captures the sequence of moves using UCI notation, and the headers configuration provides comprehensive metadata for each game, enabling detailed statistical and strategic analysis. The data is subset based on the year and month (yyyymm format) the games took place.

Supported Tasks and Leaderboards

This dataset supports tasks related to chess game analysis, including move prediction, game outcome prediction, performance analysis, and opening strategy evaluation. There are no formal leaderboards associated with this dataset.

Dataset Structure

Data Instances

An example from the moves configuration:

{
  "site": "abcd1234",
  "transcript": "e2e4 e7e5 g1f3 b8c6"
}

An example from the headers configuration:

{
  "event": "Rated Blitz game",
  "site": "abcd1234",
  "white": "player1",
  "black": "player2",
  "result": "1-0",
  "utcdate": "2023-05-21",
  "utctime": "13:45:00",
  "whiteelo": 1500,
  "blackelo": 1400,
  "whiteratingdiff": 10,
  "blackratingdiff": -10,
  "eco": "C50",
  "opening": "Italian Game",
  "timecontrol": "300+0",
  "termination": "Normal"
}

Data Fields

Moves Configuration:

• site: string, unique identifier for the game. Replays can be viewed by navigating to https://lichess.org/<site>
• transcript: string, sequence of moves in UCI format.

Headers Configuration:

• event: string, type of event.
• site: string, unique identifier for the game.
• white: string, white player.
• black: string, black player.
• result: string, game result.
• utcdate: date32, date of the game.
• utctime: time64[us], time of the game.
• whiteelo: int64, ELO rating of the white player.
• blackelo: int64, ELO rating of the black player.
• whiteratingdiff: float64, rating change for the white player.
• blackratingdiff: float64, rating change for the black player.
• eco: string, ECO code of the opening.
• opening: string, name of the opening.
• timecontrol: string, time control format.
• termination: string, reason for game termination.

Data Splits

The dataset is divided into monthly splits based on the year and month (yyyymm format). Each split contains both moves and headers configurations.

Dataset Creation

Curation Rationale

The dataset was curated to facilitate research and analysis that use chess games, providing both move sequences and comprehensive metadata.

Source Data

Initial Data Collection and Normalization

The data was collected from the Lichess.org open database, converted from PGN format to UCI format, and organized into moves and headers configurations.

Who are the source data producers?

The source data comes from games played on Lichess.org, an online platform where users from around the world play chess. This database does not distinguish between human-and bot-played games. However, it's reasonable to assume games played before April 2018 were overwhelmingly played by human players since Lichess.org released its bot api on April 1st, 2018.

Annotations

Annotation process

The annotations include metadata such as player ELO ratings, game outcomes, and dates, which were extracted from the original PGN files and normalized into a structured format.

Who are the annotators?

The annotations were generated by the Lichess.org platform and curated by the dataset creators.

Personal and Sensitive Information

The dataset does not contain any personal or sensitive information.

Considerations for Using the Data

Social Impact of Dataset

The dataset can be used to improve chess engines, develop training tools for players, and conduct research in game theory and artificial intelligence.

Discussion of Biases

The dataset may have biases related to the demographics of Lichess.org users, such as skill level distribution and regional representation.

Other Known Limitations

The dataset is limited to games played on Lichess.org and may not represent the broader chess-playing population.

Additional Information

Dataset Curators

The dataset was curated by the Lichess.org team and contributors.

Licensing Information

The dataset is available under the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license.

Citation Information

If you use this dataset, please cite it as follows:

@misc{lichess_uci,
  author = {Davis, Austin L.},
  title = {Lichess.org Database in UCI format},
  year = {2023},
  howpublished = {\url{https://database.lichess.org/}},
}

Contributions

Thanks to @austinleedavis for adding this dataset.