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task_categories: |
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- question-answering |
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# Hardest Sudoku Puzzle Dataset V2 |
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This dataset contains a mixture of easy and very hard Sudoku puzzles collected from the Sudoku community. |
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## Dataset Composition |
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### Sources |
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- [tdoku benchmarks](https://github.com/t-dillon/tdoku/blob/master/benchmarks/README.md#benchmarked-data-sets) |
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- [enjoysudoku](http://forum.enjoysudoku.com/the-hardest-sudokus-new-thread-t6539-600.html#p277835) |
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### Easy Puzzles (1.1M) |
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- puzzles0_kaggle |
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- puzzles1_unbiased |
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- puzzles2_17_clue |
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### Hard Puzzles (3.1M) |
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- puzzles3_magictour_top1465 |
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- puzzles4_forum_hardest_1905 |
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- puzzles6_forum_hardest_1106 |
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- ph_2010/01_file1.txt |
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## Dataset Characteristics |
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- All puzzles have been exact-deduped and randomly permuted by row, column, box, and digit. |
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- Each puzzle is guaranteed to have a unique solution. |
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- Puzzles in the train set are [mathematically inequivalent](http://sudopedia.enjoysudoku.com/Mathematically_equivalent.html) to those in the test set. |
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## Dataset Structure |
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- Train set: `train.csv` (3.8M examples) |
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- Test set: `test.csv` (423k examples) |
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Puzzles and solutions are flattened in row-major order. Rating is evaluated by number of backtracks needed by [tdoku solver]((https://github.com/t-dillon/tdoku) required to solve the puzzle (higher is harder). |
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## Usage Guidelines |
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1. Train models using only the train set. |
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2. Evaluate models on the test set using exact accuracy (all numbers must be correct). |
