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license: apache-2.0
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These csv files contain a single column, 'transcript', with simple PGN string gam transcripts. The data is sources from Lichess: https://database.lichess.org
All files contain some very short and very long games; I recommend filtering these, depending on your use case.

All files are filtered to include white wins only.

According to the Lichess ELO ratings saved with the game data, which typically run a little high, the files contain games filtered:
stable.csv, 24M games: White 1300-2300, Black 1300-2600
anneal.csv, 3.9M games: White 1900-2300, Black 1300*-2700. Includes some lc0-vs-lc0 and stockfish-vs-stockfish games within that range (possibly a little lower in the case of some lc0 games, but probably not given Lichess' high ratings...)
stable2.csv, 57.7M games: White 1500-2400, Black 1400-2800
anneal2.csv, 5.77M games: White 2000-2500, Black 1500-3000