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The analysis of Sudoku is generally divided between analyzing the properties of unsolved puzzles (such as the minimum possible number of given clues) and analyzing the properties of solved puzzles. Initial analysis was largely focused on enumerating solutions, with results first appearing in 2004. [1] For classical Sudoku, the number of filled ...
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]
A typical Sudoku puzzle. A standard Sudoku contains 81 cells, in a 9×9 grid, and has 9 boxes, each box being the intersection of the first, middle, or last 3 rows, and the first, middle, or last 3 columns. Each cell may contain a number from one to nine, and each number can only occur once in each row, column, and box.
Minimum Su Doku [4] – The class of puzzles which have the minimum number of clues needed to allow a complete and unique solution, i.e. minimal Sudokus. Jigsaw Sudoku – Regular 9×9 Sudoku that row and column rules apply, but instead of a 3×3 grid they are nine Jigsaw shapes.
Number puzzles Fireworks. ... 34, and 56, and 563412 is the last possible combination of these numbers. Against the clock. ... 20 Printable Sudoku Puzzles to Test Your Smarts.
The number of Sudoku grids of ... (n = 9 is the commonly played 9 × 9 Sudoku. The puzzle does not include ... then the number of possible combinations which may ...
The popular Sudoku puzzles are a special case of Latin squares; any solution to a Sudoku puzzle is a Latin square. Sudoku imposes the additional restriction that nine particular 3×3 adjacent subsquares must also contain the digits 1–9 (in the standard version). See also Mathematics of Sudoku. The more recent KenKen and Strimko puzzles are ...
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