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A Sudoku with 24 clues, dihedral symmetry (a 90° rotational symmetry, which also includes a symmetry on both orthogonal axis, 180° rotational symmetry, and diagonal symmetry) is known to exist, but it is not known if this number of clues is minimal for this class of Sudoku. [5]
A Sudoku starts with some cells containing numbers (clues), and the goal is to solve the remaining cells. Proper Sudokus have one solution. [ 1 ] Players and investigators use a wide range of computer algorithms to solve Sudokus, study their properties, and make new puzzles, including Sudokus with interesting symmetries and other properties.
This book is intended for a general audience interested in recreational mathematics, [7] including mathematically inclined high school students. [4] It is intended to counter the widespread misimpression that Sudoku is not mathematical, [5] [6] [8] and could help students appreciate the distinction between mathematical reasoning and rote calculation.
Minimum number of clues – Refers to the minimum of all proper Sudokus. (See Mathematics of Sudoku – Minimum number of givens for details). Nonet – Another term for the boxes or regions of a Sudoku. In some variants nonets are not equally shaped. Proper Sudoku [4] – A Sudoku with one solution. Sudokus are always expected to be proper ...
Sudoku game requires a puzzle to have unique solution. You can compose a multiple-solution puzzle with less than 8 differnt clues so that all solutions can be transformed to each other using the validity preserving transformations. At least this was my reading of your addition. OK, but this is a Sudoku extension.
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The fewest clues possible for a proper Sudoku is 17. [28] Tens of thousands of distinct Sudoku puzzles have only 17 clues. [29] The number of classic 9×9 Sudoku solution grids is 6,670,903,752,021,072,936,960, or around 6.67 × 10 21. [30]
Get ready for all of today's NYT 'Connections’ hints and answers for #577 on Wednesday, January 8, 2025. Today's NYT Connections puzzle for Wednesday, January 8, 2025 The New York Times
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