Science a GoGo's Home Page Forums General Discussion General Science Discussion Forum A Maths Game 'Sudoku' is Sweeping the World

Any one know who invented it, or where it came from? Its amazingly simple but very very addictive.

Apparently (care of the Daily Mail UK), a mathematician, Leonhard Euler, thought up the game 'Latin Squares' in 1783, but it became Sudoku (Su=number and Doku=uniqueness)in the eighties when a Japanese magazine chanced upon it and feed it to their readers.

I love it!

And I've just noticed that further down the posts - you already know that! :p

Yes it is very addictive. A unique time waster if you not careful. Loads of people doing it here in the UK.
You can download a Free/orBuy version of Sudoku
for your PC from the site below:-
http://www.sudoku.com/download.htm

Thanks, Mike! Installed and running

Try this site:

http://www.sudokumate.com

Better than paper and pencil!


I've been doing these puzzles for about 3 weeks (Indy 16x16) and am still picking up techniques. I started writing a solver but stopped to write this...

Hope it helps!!

BTW, SuDoku is NOT a 'Maths Game'!

There's now sudoku for mobiles too. Get it from http://www.sudokumobile.net
It's only ?3 for 90 puzzles, way cheaper than the times one.

so addictive..

Seems like a standard logic problem, to me. Just with numbers, rather than words. Same puzzle construction as with word logic puzzles, though -- just the minimum amount of info to get you started and keep you going. Fun!

I've been looking for a mobile Sudoku game that will generate puzzles like the one on sudoku.com, not one that comes packaged with some puzzles like the times one or others I've seen.

I found one at www.qgates.com and from the screen shots it looks nice and has some cool features, seems to be out on a lot of mobiles as well, including some of the older ones. It doesn't seem to be available to buy on the site, I was wondering had anyone seen this game and know where to buy it?

I'll drop them an email and see what comes back..

Chris

{Quote=Mike Kremer}

Hi Amit,
I can hardly believe I wrote about Sudoku, over 8 years ago.
They have greatly improved the Mathematical engine that produces Sudoku since then.
If you genuinely want to solve with pure Logic and no guessing...You have to
only use those Sudoki puzzels that have 23 or more starter numbers in their grid.
Fewer than 23 .. am afraid you will have to guess, to be able to complete the puzzle.

Mathematicians...Gary McGuire, Bastian Tugemann, and Gilles Civario,
spend over a year to prove and check that 17 starter numbers was the minimum
to use to make a unique Sudoku.
Also that there are exactly 6,670,903,752,021,072,936,960 possible solutions to Sudoku.....But being true Mathematicians they discounted the various symmetry arguments (also known as equivalency transformations), and the many grids that
are turned either 90 or 180 degrees including those identical grids reversed,
which reduces the numbers of grids to be checked to 5,472,730,538.

Dont forget if you want to solve any Sudoko using Logic only...You will need at
least 23 or more, starter numbers.
The Daily Mail Newspaper produced "The Worlds Hardest Sudoku" that is able to be solved with pure Logic only!
You might solve it in an hour by guessing if you are lucky.
But by using Logic alone, it will take you days, probably months.

http://www.dailymail.co.uk/news/article-...est-Sudoku.html

[/quote]

I looked on you-tube and coppied the grid and numbers from
a video that explains what sudoku is onto a excel spread sheet.

it looks like it could take a very long time to solve so
I've decided that I might make a vb program to solve the problem.

after all that is what computer programming is all about.

or at least that was the original reason.

once I get the program made it should be no problem to have
it generate excel sudoku game spread sheets that need to be solved for everyone at work to do , this will give them something to make them look busy until we fix the trade problems we currently have.