Sudokus of Shame

Everything about Sudoku that doesn't fit in one of the other sections

Postby ab » Tue May 06, 2008 9:19 pm

today's Independent (uk) had this on the back page:
Code: Select all
 . . 9 | 8 . . | . 7 4
 . . 2 | 5 3 . | 1 9 .
 . 6 . | 9 . 1 | 5 8 .
 ------+-------+------
 2 . . | . . . | . . 5
 8 4 . | 7 6 . | . . .
 . . . | . . . | . . .
 ------+-------+------
 4 . . | 6 . . | . . .
 1 . . | . . . | 4 . 3
 9 . . | 1 . . | 2 5 7

3 solutions:!:
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Postby Glyn » Tue May 06, 2008 10:47 pm

Must be a bug or a BUG.
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Postby enxio27 » Tue May 20, 2008 2:47 pm

The Irish Times and SkillPod both get their puzzles from gamezboost.

There are 1001 puzzles available in three difficulty levels, but after removing 384 puzzles with multiple solutions, and all of the extraneous canonically equivalent puzzles, we are left with only TWENTY unique puzzles!:(
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re: The Irish Times

Postby Pat » Thu May 22, 2008 9:11 am

enxio27 wrote:The Irish Times and SkillPod both get their puzzles from gamezboost.

There are 1001 puzzles available in three difficulty levels, but after removing 384 puzzles with multiple solutions, and all of the extraneous canonically equivalent puzzles, we are left with only TWENTY unique puzzles!

        The Irish Times SuDoku puzzles
        are credited to Puzzler Media Ltd.

        they publish 3 puzzles a day
          unfortunately, they don't offer an archive
        here's today's "Hard" puzzle -- all it needs is "hidden singles" !

        Code: Select all
         . . . | . . . | . . .
         . . . | 8 . 5 | . . .
         . . 5 | 9 . 6 | 2 . .
        -------+-------+------
         . 1 2 | . . . | 8 4 .
         6 . . | 7 . 3 | . . 2
         . . . | 2 8 4 | . . .
        -------+-------+------
         . 2 . | . . . | . 8 .
         . 4 . | . 9 . | . 2 .
         3 . 9 | . . . | 4 . 6

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Postby enxio27 » Sat May 24, 2008 10:50 pm

Ruud wrote:I found a lot of sites that use www.free-sudokus.com as a source for their sudokus. This site is flooding the web with multiple-solution sudokus.


I wondered just what percentage of these puzzles might be multi-solution, so just as a test, I took a sample of 200 puzzles from the above site, compiled them into a puzzle collection file (.SDM) and ran them through Ruud's Sudocue. 197 out of 200 had multiple solutions. That's pathetic! I didn't bother to run them through Sadman Sudoku to count solutions of each. I was so disgusted that I immediately deleted the whole mess.
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Re: re: The Irish Times

Postby enxio27 » Sat May 24, 2008 11:02 pm

Pat wrote:The Irish Times SuDoku puzzles
are credited to Puzzler Media Ltd.


Perhaps I should have specified the sudoku game on The Irish Times Web site:

http://games.ireland.com/playgame-new.php?game=398&game_name=Sudoku%20Master

These are the puzzles from gamezboost.com.

It does appear that the printed edition of The Irish Times takes its puzzles from Puzzler Media. Not having access to the printed copy, I assumed the same puzzles were in both. I stand corrected.:)
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Postby m_b_metcalf » Sun May 25, 2008 3:07 am

enxio27 wrote:I didn't bother to run them through Sadman Sudoku to count solutions of each. I was so disgusted that I immediately deleted the whole mess.


The first one I tried had eight solutions.

Regards,

Mike Metcalf
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Postby enxio27 » Wed Jul 02, 2008 12:47 am

In the Sudoku for Dummies book, volume 1, puzzles #6, #8, #10, and #16 all have multiple solutions.
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Postby Glyn » Wed Jul 02, 2008 1:15 am

Surely this multi-solution puzzle represents excellent value in these times of economic woe.:(

Code: Select all
. . .|. . .|. . .
. . .|. . .|. . .
. . .|. . .|. . .
-----+-----+-----
. . .|. . .|. . .
. . .|. . .|. . .
. . .|. . .|. . .
-----+-----+-----
. . .|. . .|. . .
. . .|. . .|. . .
. . .|. . .|. . .


Please save the planet by not requesting the solution supplement.:D
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Postby udosuk » Wed Jul 02, 2008 1:56 am

Glyn wrote:Surely this multi-solution puzzle represents excellent value in these times of economic woe.:(

Code: Select all
. . .|. . .|. . .
. . .|. . .|. . .
. . .|. . .|. . .
-----+-----+-----
. . .|. . .|. . .
. . .|. . .|. . .
. . .|. . .|. . .
-----+-----+-----
. . .|. . .|. . .
. . .|. . .|. . .
. . .|. . .|. . .

This puzzle can have a unique solution - see this thread.:D
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Dottin Technique

Postby sudokumaestro » Thu Jul 10, 2008 2:45 pm

This is the latest system for solving sudokus, brothers, lets face it, sudokus are not about number values, they are about positioning.
This technique creates a pattern within the cells and as a marker can be used with any other system, i.e. XY wings etc...
The dottin system creates a "pattern" at the micro-cosmic level.
Once you get acost-"tuned" to the patterns your speed of recognition will be dramatically enhanced.
Anyways this has been my experience. Check it out, DOTTIN rocks!..


http://sudokusolvingsys.blogspot.com/
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Postby tarek » Thu Jul 10, 2008 6:42 pm

sudokuhamster,

it is funny that you chose sudokus of shame for your spamming conquest.

spam 3 more threads & you get a lollipop.

tarek
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Apologies

Postby sudokumaestro » Fri Jul 11, 2008 6:57 pm

This was meant to go somewhere else.
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Postby tarek » Fri Jul 11, 2008 7:41 pm

mistakes can happen,

I'll delete my previous post after you've Edit your posts.

then we could go for a process of deletion.

No harm done:)
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Postby ab » Wed Feb 18, 2009 8:57 am

i bought the Independent today. It's not my usual paper. This was their quick sudoku on page 2:
Code: Select all
 . . . | 3 9 5 | 6 . .
 . . . | . . 7 | . 1 2
 . 6 . | . . . | . . 4
 ------+-------+------
 . 8 3 | . . 2 | . 6 .
 4 . 9 | 5 . . | . . .
 . 7 . | . . . | . . .
 ------+-------+------
 6 9 . | . . . | 7 4 8
 3 5 . | . 8 . | . . .
 . . . | . 1 . | . . .

edit: to make matters worse it's a prize sudoku!
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