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The World Sudoku Championship (WSC) is an annual international puzzle competition organised by a member of the World Puzzle Federation. The first event was held in Lucca in 2006. National teams are determined by local affiliates of the World Puzzle Federation. The competition typically consists of 100 or more puzzles solved by all competitors ...
Terminology and grid layout. A Sudoku (i.e. the puzzle) is a partially completed grid. A grid has 9 rows, 9 columns and 9 boxes, each having 9 cells (81 total). Boxes can also be called blocks or regions. [1] Three horizontally adjacent blocks are a band, and three vertically adjacent blocks are a stack. [2]
In classic Sudoku, the objective is to fill a 9 × 9 grid with digits so that each column, each row, and each of the nine 3 × 3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single ...
Sudoku. Completely fill the 9x9 grid, using the values 1 through 9 only once in each 3x3 section of the puzzle. Put on your Sudoku hat and get ready for a challenging Sudoku puzzle!
A Sudoku with 17 clues and diagonal symmetry. A Sudoku with 18 clues and orthogonal symmetry. A Sudoku with 24 clues and complete geometric symmetry. A Sudoku with 19 clues and two-way orthogonal symmetry. Many Sudokus have been found with 17 clues, although finding them is not a trivial task.
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The data set of a logic grid puzzles can be any number of categories, but are limited by the corresponding increase in complexity, with most having only two, three, or even four categories. While designed more as a table-based puzzle than a matrix, the most famous example of a logic-grid puzzle may be the so-called Zebra Puzzle , which asks the ...
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