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--- |
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license: cc0-1.0 |
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tags: |
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- chess |
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- lichess |
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- stockfish |
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--- |
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# Dataset Card for the Stockfish Evaluations |
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A dataset of chess positions evaluated with various flavours of Stockfish running within user browsers. Produced by, and for, the [Lichess analysis board](https://lichess.org/analysis). Evaluations are formatted as JSON; one position per line. |
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The schema of a position looks like this: |
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``` |
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{ |
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"fen": "8/8/2B2k2/p4p2/5P1p/Pb6/1P3KP1/8 w - -", |
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"depth": 42, |
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"evaluation": 5.64, |
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"best_move": "Kg1", |
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"best_line": "Kg1 Ke6 Kh2 Kd6 Be8 Kc5 Kh3 Kd6 Bb5 Ke7" |
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} |
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``` |
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- **`fen`**: `string`, the position FEN only contains pieces, active color, castling rights, and en passant square. |
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- **`depth`**: `int`, the depth reached by the engine. |
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- **`evaluation`**: `string`, the evaluation for the given FEN/board state. |
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- **`best_move`**: `string`, the first move of the best_line, in **SAN** format. |
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- **`best_line`**: `string`, the first principal variation for the given highest available depth, in **SAN** format. |
