metadata

license: cc0-1.0
tags:
  - chess
  - lichess
  - chess puzzles

Dataset Card for Chess Puzzles (SAN)

4,130,824 chess puzzles from Lichess with moves converted to standard algebric notation. Puzzles are formatted as standard CSV. The fields are as follows:

PuzzleId,new_FEN,best_Moves,Rating,RatingDeviation

PuzzleId: string, the puzzle's unique identifier. The puzzle would be live at https://lichess.org/training/{PuzzleID}.
new_FEN: string, the FEN string of the position after the opponent has made their move. It is now player's turn to make the move and solve the puzzle.
best_Moves: string, the solution to the puzzle. All player moves of the solution are "only moves", i.e. playing any other move would considerably worsen the player position. An exception is made for mates in one: there can be several. Any move that checkmates should win the puzzle.
Rating: int, the Glicko-2 rating of the puzzle.
RatingDeviation: int, the Glicko-2 rating deviation of the puzzle.