Created as "Number Place" in the 1970s, this logic puzzle gained mass popularity in Japan in the 1980s. "Sudoku", or "Su Doku", is Japanese for "number singly." In 2005 it gained great appeal in the United Kingdom and is rapidly expanding to the rest of the Western Hemisphere. The aim of the puzzle is to place a number from 1-9 in every square in the grid so that every row, column and 3x3 "region" includes each number once only. While numbers are most often used, this is only for simplicity. No math is required, only logic.
Chats and Forums
Sites where sudoku enthusiasts from all over the world can interact with each other to share views, tips and strategies.
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Software
This category is for sites primarily focused on the use and/or distribution of computer software for Sudoku.
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Variants
This category is for sites about variations of traditional Sudoku. Such variations may include Word Doku (using letters that often spell words), deviations from the 9×9 grid with the 3×3 regions (for example: non-square regions, larger/smaller grids, combined boards, and so on) or any other variation.
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