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--- |
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license: cc0-1.0 |
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dataset_info: |
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features: |
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- name: image |
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dtype: image |
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- name: board_state |
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dtype: string |
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- name: active_color |
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dtype: string |
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- name: castling_rights |
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dtype: string |
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- name: en_passant_target_square |
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dtype: string |
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- name: best_continuation |
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dtype: string |
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splits: |
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- name: train |
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num_bytes: 26061473408.474 |
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num_examples: 999999 |
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- name: validation |
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num_bytes: 3293166231 |
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num_examples: 125000 |
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- name: test |
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num_bytes: 3242260311 |
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num_examples: 125000 |
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download_size: 31940403915 |
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dataset_size: 32596899950.474 |
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configs: |
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- config_name: default |
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data_files: |
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- split: train |
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path: data/train-* |
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- split: validation |
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path: data/validation-* |
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- split: test |
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path: data/test-* |
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language: |
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- en |
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tags: |
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- chess |
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- chess puzzles |
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- lichess |
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- chess positions |
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- chess board |
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--- |
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# Dataset Card for Chess Puzzles Images (large) |
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This dataset contains 1,249,999 chess board positions in JPG format, derived from [Lichess](https://lichess.org/training/themes) puzzles. Each image is accompanied by a shortened FEN string, indication for the color to play as, castling and en passant availability, and best moves in standard algebraic notation. |
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The fields are as follows: |
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- **`image`**: `image`, A visual representation of the chess board showing the current piece arrangement. |
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- **`board_state`**: `string`, A shortened FEN (Forsyth–Edwards Notation) string representing the piece placement on the board after the opponent's move. This state indicates the position from which the player must find the correct continuation. |
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- **`active_color`**: `string`, Indicates which player's turn it is to move. "w" for White to move and "b" for Black to move. |
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- **`castling_rights`**: `string`, Indicates the remaining castling options for both players. If neither side has the ability to castle, this field uses the character "-". Otherwise, **this field contains one or more letters**: "K" if White can castle kingside, "Q" if White can castle queenside, "k" if Black can castle kingside, and "q" if Black can castle queenside. |
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- **`en_passant_target_square`**: `string`, Specifies the square in algebraic notation where an en passant capture is possible. If no en passant capture is available, this field contains "-". |
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- **`best_continuation`**: `string`, The solution to the puzzle, consisting of "only moves" - moves that are significantly better than any alternatives. For mate-in-one puzzles, multiple solutions may exist if they all result in checkmate. |
