| 1. | The more recent KenKen puzzles are also examples of Latin squares.
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| 2. | A valid Sudoku solution grid is also a Latin square ..
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| 3. | This is roughly times the number of 9? Latin squares.
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| 4. | Such an arrangement would form a Graeco-Latin square.
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| 5. | For example, the orthogonal array representation of the following Latin square is:
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| 6. | This formula for the number of Latin squares is,
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| 7. | In TAOCP Vol 4A there is some stuff about pairs of latin squares.
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| 8. | The rest of the article references stuff related to Latin square and Sudoku.
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| 9. | Hence the Latin square cannot represent a group.
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| 10. | Orthogonal arrays generalize the idea of mutually orthogonal latin squares in a tabular form.
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