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Probable stupid question

 
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Fri Dec 17, 2010 10:11 pm    Post subject: Probable stupid question Reply with quote

Have you ever seen an invalid puzzle published by a legitimate site?
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daj95376



Joined: 23 Aug 2008
Posts: 3854

PostPosted: Fri Dec 17, 2010 11:07 pm    Post subject: Reply with quote

I've seen numerous Windoku puzzles posted with Sudoku in the title. The only way I could tell the difference was the shading on the four additional "boxes" used in a Windoku puzzle. Many of these puzzles have been posted in the Help section of the Players' Forums. The airline magazines are notorious for making this mistake.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat Dec 18, 2010 1:01 am    Post subject: Reply with quote

Thanks Danny. I was wondering about the sites that are commonly mentioned around here, like Brain Bashers, Menneske, Vanhegan and the like.
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peterj



Joined: 26 Mar 2010
Posts: 974
Location: London, UK

PostPosted: Sat Dec 18, 2010 8:15 pm    Post subject: Reply with quote

Marty, I have never found an invalid one on these mainstream sites - and I usually use SimpleSudoku which checks...

Here is a famous one that was carved into a hill near the M4 (a major "freeway") in the UK...


... sadly it had 1,905 solutions, bit of a waste of an ancient chalk hillside Exclamation
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sun Dec 19, 2010 12:11 am    Post subject: Reply with quote

That's certainly the first hillside one I've heard of. Laughing
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Wed Dec 22, 2010 9:01 pm    Post subject: Reply with quote

Marty,

If you search on 'pseudo sudoku' you will find invalid puzzles: Those with many, or no, solutions.

Keith

PS: Currently spending a week in London, courtesy of BAA and BA. On the last flight to land at Heathrow before it was closed on Saturday.
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sun Apr 03, 2011 9:00 pm    Post subject: Reply with quote

Marty R. wrote:
Thanks Danny. I was wondering about the sites that are commonly mentioned around here, like Brain Bashers, Menneske, Vanhegan and the like.

Marty,

The worst transgression I have seen from these sites is to misclassify the difficulty of a puzzle. "Very Hard" does not require advanced moves, for example. That happens occasionally (once per year?) on this site.

There was a thread "Sudokus of shame" on the old Players' Forum that collected invalid puzzles and their sources.

A few years ago I noticed that the Sudoku section of about.com had invalid puzzles. I told them, and the puzzles were replaced with valid ones.

Keith
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Pat



Joined: 23 Feb 2010
Posts: 207

PostPosted: Tue Apr 05, 2011 7:44 am    Post subject: Reply with quote

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