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Old puzzle - May 21

 
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Don Taylor



Joined: 24 Sep 2005
Posts: 2

PostPosted: Sun Sep 25, 2005 1:09 pm    Post subject: Old puzzle - May 21 Reply with quote

My wife and I got different answers for this one. They both seem OK. Is it possible they are both right (someone said only one answer per puzzle?)
Thanx

437895162 437895162
512764983 512764983
698231457 698213457
249176538 349176528
356928714 256938714
871543629 871542639
925617348 985627341
163489275 163489275
784352196 724351896

The second one is the supposed solution (my wife's! LOL )
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geoff h



Joined: 07 Aug 2005
Posts: 58
Location: Sydney

PostPosted: Sun Sep 25, 2005 1:29 pm    Post subject: Reply with quote

Sorry Don, but your wife's right in this case.

Your solution has two number 1 s in Column 7 and two number 8 s in Column 9.

There can only be one solution to a Sudoku puzzle.

Cheers.
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Don Taylor



Joined: 24 Sep 2005
Posts: 2

PostPosted: Sun Sep 25, 2005 1:34 pm    Post subject: Damn, wrong again!! Reply with quote

Thanx Geoff
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alanr555



Joined: 01 Aug 2005
Posts: 193
Location: Bideford Devon EX39

PostPosted: Sun Sep 25, 2005 10:41 pm    Post subject: Reply with quote

[quote="geoff h"]
> Sorry Don, but your wife's right in this case.
> There can only be one solution to a Sudoku puzzle.

This assertion needs to be tempered.

"There can only be one solution to a Sudoku puzzle THAT IS PUBLISHED
on the DAILY SUDOKU site".

Other sources (the Daily Telegraph being one) delight in having more than
one solution - taking the reader to a "stuck" point after which one has to
work by trial and error and backtrack to the checkpoint.

It is perhaps the greatest virtue of this site that one can be assured that
there is a UNIQUE solution and that the puzzles can be solved by logic
(even if the logic seems a bit tortuous in some cases and has not yet been
reduced to computer code!).

I, for one, decline to consider Daily Telegraph puzzles any more.

Alan Rayner BS23 2QT
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