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Simple Sudoku coloring help please

 
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cheezfri

Joined: 31 Mar 2006
Posts: 1
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PostPosted: Fri Mar 31, 2006 4:12 pm    Post subject: Simple Sudoku coloring help please Reply with quote

Hi there, I have read these boards alot but have just registered today. I have SS version 4.1z.

Maybe I just don't understand the concept of coloring: Here's my grid (only the 5s candidates are shown):

xxx|xxx|xxx
xxx|xxx|xxx
xxx|xxx|xxx
---------------
55x|xxx|xxx
xxx|5xx|5xx
xxx|5xx|xx5
---------------
5xx|xxx|5xx
xxx|xxx|xxx
x5x|xxx|5x5

SS won't let me eliminate the bold 5 (R9C7) as a candidate. Why not?

Thanks in advance for your help!
cheezfri
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Ruud
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Joined: 17 Sep 2005
Posts: 708
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Location: Netherlands

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PostPosted: Fri Mar 31, 2006 4:49 pm    Post subject: Reply with quote

When colors are applied, 2 chains can be formed (A-B) and (C-D)

Code:
xxx|xxx|xxx
xxx|xxx|xxx
xxx|xxx|xxx
-----------
ABx|xxx|xxx
xxx|Cxx|Dxx
xxx|Dxx|xxC
-----------
Bxx|xxx|Axx
xxx|xxx|xxx
xAx|xxx|5xD


There is no reason why the candidate in R9C7 should be eliminated.

Ruud.
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LB2064

Joined: 03 Mar 2006
Posts: 3
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PostPosted: Fri Mar 31, 2006 11:31 pm    Post subject: Re: Simple Sudoku coloring help please Reply with quote

cheezfri wrote:
..SS won't let me eliminate the bold 5 (R9C7) as a candidate. Why not? ......


Why don't you post the code for the actual puzzle. There may be something you are missing in the puzzle (like another 5 elsewhere).
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