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Help with logic

 
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Bern.B



Joined: 14 Dec 2012
Posts: 9
Location: Edmonton,Canada

PostPosted: Fri Dec 14, 2012 11:26 pm    Post subject: Help with logic Reply with quote

http://www.dailysudoku.com/sudoku/play.shtml#

In the above link is a Soduko in which the latest entry is a 2 in R9,C9.
I do not see the logic for placing a 2 there.

Thanks for the help

PS click LOAD on the site
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Marty R.



Joined: 12 Feb 2006
Posts: 5175
Location: Rochester, NY, USA

PostPosted: Sat Dec 15, 2012 1:19 am    Post subject: Reply with quote

This link goes to a blank grid. Clicking Load will insert the last puzzle that I had saved. Where is the puzzle for which you want your question answered?
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Bern.B



Joined: 14 Dec 2012
Posts: 9
Location: Edmonton,Canada

PostPosted: Sat Dec 15, 2012 2:05 am    Post subject: Reply with quote

Code:

+--------------+------------+----------------+
| 78  2478 478 | 36   1 9   | 2346 23467 5   |
| 6   245  1   | 35   7 345 | 234  8     9   |
| 3   9    457 | 2    8 456 | 46   1467  14  |
+--------------+------------+----------------+
| 789 478  3   | 789  2 17  | 5    14    6   |
| 589 58   6   | 389  4 13  | 7    123   128 |
| 1   478  2   | 3678 5 367 | 9    34    48  |
+--------------+------------+----------------+
| 2   6    9   | 4    3 8   | 1    5     7   |
| 578 1    578 | 57   9 2   | 46   46    3   |
| 4   3    578 | 1    6 57  | 28   9     28  |
+--------------+------------+----------------+

Play this puzzle online at the Daily Sudoku site
Sorry, here is the code.
From here on I could not go any further and using HINT it placed a 2 in r9,c9. What is the logic here?
Thanks
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Marty R.



Joined: 12 Feb 2006
Posts: 5175
Location: Rochester, NY, USA

PostPosted: Sat Dec 15, 2012 2:32 am    Post subject: Reply with quote

OK. I don't know you or your level of experience. So I'll just say to look very closely at column 7. Just ask again if that doesn't help.
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Bern.B



Joined: 14 Dec 2012
Posts: 9
Location: Edmonton,Canada

PostPosted: Sat Dec 15, 2012 3:12 am    Post subject: Reply with quote

Yes, thanks I see it now.
8 is the only number in c7 making 2 the only number in r9,c9.

I just started playing Soduko recently and learning it.

Thanks again for your help.
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Marty R.



Joined: 12 Feb 2006
Posts: 5175
Location: Rochester, NY, USA

PostPosted: Sat Dec 15, 2012 4:46 am    Post subject: Reply with quote

You're welcome. I'm mildly curious why the hint wasn't for 8 in r9c7 since that occurs before the 2 goes in r9c9, but I'm not going to get an answer to that and won't lose any sleep over it.
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keith



Joined: 19 Sep 2005
Posts: 3182
Location: near Detroit, Michigan, USA

PostPosted: Sat Dec 15, 2012 5:55 am    Post subject: Reply with quote

Marty R. wrote:
You're welcome. I'm mildly curious why the hint wasn't for 8 in r9c7 since that occurs before the 2 goes in r9c9, but I'm not going to get an answer to that and won't lose any sleep over it.

Look at 8 in C9 and B6.

Keith
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