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Killer sudoku (also killer su doku, sumdoku, sum doku, sumoku, addoku, or samunanpure サムナンプレ sum-num(ber) pla(ce)) is a puzzle that combines elements of sudoku and kakuro. Despite the name, the simpler killer sudokus can be easier to solve than regular sudokus, depending on the solver's skill at mental arithmetic ; the hardest ones ...
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.
A Sudoku puzzle can be expressed as a graph coloring problem. [27] The aim is to construct a 9-coloring of a particular graph, given a partial 9-coloring. The fewest clues possible for a proper Sudoku is 17. [28] Tens of thousands of distinct Sudoku puzzles have only 17 clues. [29]
For classical Sudoku, the number of filled grids is 6,670,903,752,021,072,936,960 (6.671 × 10 21), which reduces to 5,472,730,538 essentially different solutions under the validity-preserving transformations. There are 26 possible types of symmetry, but they can only be found in about 0.005% of all filled grids. An ordinary puzzle with a ...
English: A Sudoku that is difficult to be solved by a brute force algorithm. It can still be easily solved with elementary pen and paper methods alone. It can still be easily solved with elementary pen and paper methods alone.
Consequently it is not necessary to test for undefind params, but I do so for compatibility with future usage. See [[Template: Sudoku 9x9 grid]] for details and [[Template: Sudoku 3x3 table]] for table trivia Modeled after [[Template: 4x4 type square]] Orig: LarryLACa 11/4/05 Comment must cuddle next template call to avoid nl whitespace
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Implemented with multiple templates. Call tree order: Template:Sudoku 9x9 grid top wrapper, set defa values Template:Sudoku 9x9 table table with 9 boxes, 81 cells, major grids, outer border]] Template:Sudoku 3x3 box 3x3 box 9 cells Template:Sudoku 3x3 table 3x3 table with 9 cells, int. grids only, no outer border
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