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Lichess/
chess-puzzles

Name: chess-puzzles
Creator: Lichess
License: https://spdx.org/licenses/CC0-1.0.html

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	Dataset Card for Lichess Puzzles





	


	Dataset Description

6,057,356 puzzles, rated and tagged. See them in action on Lichess. This dataset is updated monthly, and was last updated on July 7th, 2026.

Dataset Creation

Generating the initial dataset 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.… See the full description on the dataset page: https://huggingface.co/datasets/Lichess/chess-puzzles.