Tactical chess puzzles drawn from the Lichess Open Puzzle Database,
augmented with full PGN game context reconstructed from the source Lichess games.
Each record presents a middlegame position as a PGN move sequence — the same format used
to train PGN language models like kn1ght — together
with the engine-validated best move as the label.
5,000 puzzles with reconstructed PGN context
Rating range: 1200–1900 (mean: 1540)… See the full description on the dataset page:
https://huggingface.co/datasets/InterwebAlchemy/pgn-lichess-puzzle-dataset.
