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endgame-dataset

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endgame-dataset / README.md

avewright

card: 300,017 SF19 rows

9277353 verified about 1 month ago

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metadata

license: mit
tags:
  - chess
  - stockfish-19
  - soft-labels
  - multipv
  - endgame
pretty_name: Endgame Stockfish 19 soft targets

avewright/endgame-dataset

6–13 piece positions with official Stockfish 19 MultiPV soft targets. SF vs SF games start from Lichess ECO, fast-forward (capture-biased) until the piece window, then label.

300,017 rows. Source id 4. Vocab compact (1968).

Filter

Keep only boards with 6 ≤ n_pieces ≤ 13
Stop the game below 6 pieces (Syzygy territory)
split=1 is a ~5% holdout. Honor split.

ECO starts: 7,852.

Teacher

Stockfish 19 tag sf_19 (``)
Full strength, Threads=1, Hash=64, UCI_ShowWDL=true
Label: 100,000 nodes / MultiPV=8 / tau=120
Fast-forward play: captures first, else ≤800-node search
cp / mate / wdl: White-absolute
soft_indices / soft_probs: width 8

Accepted so far: 299,982.

Files

data/shard_XXXXXX.parquet
teacher.json, endgame.json, openings.json, manifest.json, stats.json