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. There are also variants using letters or symbols, different-sized grids, overlapping grids, and other variations.
Please only submit sites here which are related exclusively to Sudoku. Websites which relate to other games or puzzles as well as Sudoku should be submitted to a more general category.
Sites where sudoku enthusiasts from all over the world can interact with each other to share views, tips and strategies.
Only sites that contain chats or forums dedicated to Sudoku should be submitted to this category. If your website is related to games or puzzles in general then it should be submitted to a more general category.

Remember submitting to an incorrect category will only slow the listing of your website

This category is for sites primarily focused on the use and/or distribution of computer software for Sudoku. Such software could...
  • Create puzzles for the user to solve, either directly or after exporting/printing
  • Solve puzzles from other sources
  • Provide clues/hints for the user to solve a puzzle they are struggling with
...or any combination. Online (browser-based) applications will be found in Games: Video Games: Puzzle: Browser Based: Sudoku.
Suggested sites should be primarily focused on software for Sudoku.
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.
Please only submit sites that are entirely about one or more variations of Sudoku. Sites that cover traditional Sudoku as well as variations should be submitted in the main category.