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Sudoku (数独, sūdoku, listen (help·info)) (English pronunciation: /suːˈdoʊkuː/ soo-DOH-koo) is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid (also called "boxes", "blocks", "regions", or "sub-squares") contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which typically has a unique solution. Completed puzzles are always a type of Latin square with an additional constraint on the contents of individual regions. For example, the same single integer may not appear twice
The puzzle was popularized in 1986 by the Japanese puzzle company Nikoli, under the name Sudoku, meaning single number. It became an international hit in 2005. From Wikipedia under the
GNU Free Documentation License How does a computer generate sudoku puzzles of different levels? Q. How does a computer know how to generate an "easy", "medium", or "hard" sudoku? The number of filled-in squares does not describe the level of difficulty. Asked by Jeff B - Sat Aug 8 11:33:20 2009 - - 2 Answers - 0 Comments A. part of it is the total number of blank squares that they start you off with. Answered by brioma33 - Sat Aug 8 11:46:41 2009 What is the minimum quanity of numbers a sudoku puzzle must have at start and yet still only have one solution Q. If you attempted to solve a sudoku puzzle that only had one blank square then it would be the easiest sudoku possible. On the other hand, a sudoku puzzle with 80 blank squares is almost equally as easy because there are thousands of possible solutions. There must, therefore be an optimum quantity of "starter numbers" that constitute the hardest possible sudoku puzzle by having only one possible solution and yet having the minimum of clues. Additionally i would love to see the maths behind the answer. Asked by mockneysparra - Fri Jun 15 04:58:38 2007 - - 3 Answers - 0 Comments A. hmm good question but no idea - i guess there needs to be at least one number in each square - so a minimum of 9 numbers to start? Answered by ejb199 - Fri Jun 15 08:23:24 2007 Where can I get SuDoku puzzles online that I can print out?
Q. I need regular SuDoku puzzles that can be printed out. Any level is ok. Asked by actress singer violinist - Sat Sep 9 22:42:18 2006 - - 10 Answers - 1 Comments A. Try this site:- www.sudoku.org.uk where you can not only download daily sudoku puzzles but also jigsaw sudoku and killer sudoku puzzles! To top it all there's also backpuzzles from LA Times and the Daily Telegraph. Enjoy! Answered by giko - Sun Sep 10 12:54:10 2006 From Yahoo Answer Search: "sudoku"  blogs.wsj.com Fri, 27 Aug 2010 12:06:25 GMT+00:00 Wall Street Journal (blog) Until that point, Sudoku puzzles are a decent way to pass the time. This one is supposed to be the hardest ever: It's still probably easier than trying to ...  gamasutra.com Tue, 24 Aug 2010 12:05:35 GMT+00:00 Gamasutra The first two games, Astraware Sudoku and OddBlob, will initially support Pre TM and Pre Plus devices with support for Pixi TM to be added later. ... New in the App Catalog for 23 August 2010 PreCentral.net (blog)  redandblack.com Tue, 17 Aug 2010 03:42:03 GMT+00:00 Red and Black I'm sure I was doing something important like last minute reading or the Sudoku in The Red & Black. Then, out of nowhere, I hear this familiar and majestic ... From Google News Search: "sudoku"  kids-software.com 610px x 550px | 86.60kB [source page] and stereograms There are plenty of monthly contests on the site to participate in Brainbashers com is a goldmine for older kids and teens interested in maths logic strategy and riddles Playing a very easy Sudoku game for kids on Brainbashers com From Yahoo Image Search: "sudoku"  mobile360.org Windy Fri, 13 Aug 2010 14:43:22 GM Sudoko Plus, is a mobile app for Nokia cell phones created with a super optimized algorithm that beats all its peers when it comes to solving any puzzle, From Google Blog Search: "sudoku" |
