card: 35,000 SF19 rows
Browse files
README.md
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---
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license: mit
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tags:
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- chess
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- stockfish-19
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- soft-labels
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- multipv
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- endgame
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pretty_name: Endgame Stockfish 19 soft targets
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---
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# avewright/endgame-dataset
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**6–12 piece** positions with official **Stockfish 19** MultiPV soft
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targets. SF vs SF games start from Lichess ECO, fast-forward (capture-biased)
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until the piece window, then label.
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**35,000** rows. Source id `4`. Vocab `compact` (1968).
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## Filter
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- Keep only boards with `6 ≤ n_pieces ≤ 12`
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- Stop the game below 6 pieces (Syzygy territory)
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- `split=1` is a ~5% holdout. Honor `split`.
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ECO starts: 7,852.
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## Teacher
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- Stockfish 19 tag `sf_19` (``)
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- Full strength, `Threads=1`, `Hash=64`, `UCI_ShowWDL=true`
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- Label: **100,000 nodes / MultiPV=8** / `tau=120`
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- Fast-forward play: captures first, else ≤800-node search
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- `cp` / `mate` / `wdl`: **White-absolute**
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- `soft_indices` / `soft_probs`: width 8
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Accepted so far: 7,751.
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## Files
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- `data/shard_XXXXXX.parquet`
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- `teacher.json`, `endgame.json`, `openings.json`, `manifest.json`, `stats.json`
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