README.md

metadata

dataset_info:
  features:
    - name: PuzzleId
      dtype: string
    - name: FEN
      dtype: string
    - name: Moves
      dtype: string
    - name: Rating
      dtype: int64
    - name: RatingDeviation
      dtype: int64
    - name: Popularity
      dtype: int64
    - name: NbPlays
      dtype: int64
    - name: Themes
      dtype: string
    - name: GameUrl
      dtype: string
    - name: OpeningTags
      dtype: string
  splits:
    - name: train
      num_bytes: 888854149
      num_examples: 4062423
  download_size: 423300746
  dataset_size: 888854149
configs:
  - config_name: default
    data_files:
      - split: train
        path: data/train-*
license: cc0-1.0
pretty_name: Lichess puzzles
tags:
  - chess

Dataset Card for Lichess Puzzles

4,062,423 chess puzzles, rated and tagged. See them in action on Lichess.

Generating these chess puzzles took more than 50 years of CPU time. We went through 300,000,000 analyzed games from the Lichess database, and re-analyzed interesting positions with Stockfish 12/13/14/15 NNUE at 40 meganodes. The resulting puzzles were then automatically tagged. To determine the rating, each attempt to solve is considered as a Glicko2 rated game between the player and the puzzle. Finally, player votes refine the tags and define popularity.

Dataset Usage

Using the datasets library:

from datasets import load_dataset
dset = load_dataset("Lichess/puzzles", split="train")

Dataset Details

Dataset Sample

One row of the dataset looks like this:

{'PuzzleId': '0009B',
 'FEN': 'r2qr1k1/b1p2ppp/pp4n1/P1P1p3/4P1n1/B2P2Pb/3NBP1P/RN1QR1K1 b - - 1 16',
 'Moves': 'b6c5 e2g4 h3g4 d1g4',
 'Rating': 1112,
 'RatingDeviation': 74,
 'Popularity': 87,
 'NbPlays': 569,
 'Themes': 'advantage middlegame short',
 'GameUrl': 'https://lichess.org/4MWQCxQ6/black#31',
 'OpeningTags': 'Kings_Pawn_Game Kings_Pawn_Game_Leonardis_Variation'}

Dataset Fields

Every row of the dataset contains the following fields:

• PuzzleId:
• FEN:
• Moves:
• Rating:
• RatingDeviation:
• Popularity:
• NbPlays:
• Themes:
• GameUrl:
• OpeningTags: