Just a little help with this puzzle please

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Just a little help with this puzzle please

Postby studville » Mon Apr 03, 2006 12:01 pm

Just a few numbers would help out quite a bit. I've gotten this far. I can't really think of anything else logical except guessing. Am I missing something blatantly obvious?

Thanks


Code: Select all
 *-----------*
 |7..|.1.|6.3|
 |...|...|1..|
 |615|...|8..|
 |---+---+---|
 |..9|6.1|.8.|
 |..2|894|36.|
 |.6.|5.7|9..|
 |---+---+---|
 |..6|...|298|
 |..7|...|...|
 |2..|.4.|..6|
 *-----------*
studville
 
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Postby Carcul » Mon Apr 03, 2006 12:04 pm

Hi Studville.

Welcome to this forum. Tip: you have a naked pair in box 5 that allows some eliminations in column 5 and in .... Good luck.

Regards, Carcul
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Joined: 04 November 2005

Postby studville » Mon Apr 03, 2006 12:56 pm

Carcul wrote:Hi Studville.

Welcome to this forum. Tip: you have a naked pair in box 5 that allows some eliminations in column 5 and in .... Good luck.

Regards, Carcul


Well focusing in on box 5... I know rows 4 & 6 have to be either a 2 or 3. But afterwards, I try to figure out the rest of column 5 and it leads me in a circular logic.:(
studville
 
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box-line interaction

Postby Pat » Mon Apr 03, 2006 1:06 pm

studville wrote:Well focusing in on box 5... I know rows 4 & 6 have to be either a 2 or 3. But afterwards, I try to figure out the rest of column 5 and it leads me in a circular logic.


hi studville,

it's called box-line interaction -

what are the possibilities for r3c5 ?
( after eliminating 2 and 3 which must be in c5 of box 5 )

Pat
User avatar
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Re: box-line interaction

Postby studville » Mon Apr 03, 2006 1:14 pm

Pat wrote:
studville wrote:Well focusing in on box 5... I know rows 4 & 6 have to be either a 2 or 3. But afterwards, I try to figure out the rest of column 5 and it leads me in a circular logic.


hi studville,

it's called box-line interaction -

what are the possibilities for r3c5 ?
( after eliminating 2 and 3 which must be in c5 of box 5 )

Pat


Carcul and Pat,

You are my saviours. Whenever I get stumped... I tend make things harder than they should be... I totally didn't think about "scanning" across row 3 (only possibility being 7). Thanks a lot. I look forward to learning more techniques from here in the future -- I'm hooked.
studville
 
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Joined: 03 April 2006

Postby newatthis » Sat Apr 08, 2006 12:54 am

Try the site below. They explain many tips, from very basic, like naked pairs to complex, like colouring.


http://www.sadmansoftware.com/sudoku/techniques.htm
newatthis
 
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