Need help with a (simple) puzzle

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Need help with a (simple) puzzle

Postby 5krunner » Thu Jan 26, 2006 4:15 pm

I am at an impass with a fairly easy puzzle. Not sure why, but was hoping someone would have a suggestion on the next step. Thanks VERY much.

4--5,6--8--1,5,6,7--3--1,2,5,6,7--1,2,5,7--9
1,2,5,7--1,2--7--1,2,6 9--1,2,5,6--8--1,2,5--4--3
1,2,9--5,9--3--1,5,7--4--1,2,5,7--6--8--1,2,5,7
7--1,2--5--3--1,6--9--4--2,6-8
3--8--9--2--1,5,6,7--4--1,5,7--5,6,7--1,5,6
6--1,2--4--8--1,5,7--1,5,7--9--3-- 1,2,5,7
1,2,5--3--7--1,4,5,6--9--1,2,5,6--8--2,5,6--2,4,5,6
8--4--2,6--5,6,7--2,5,6,7--3--2,5,7--1--9
1,2,5,9--6,9--1,2,6--1,4,5,6,9--8--1,2,5,6,7--3--2,5,6,7--2,4,5,6,7

(sorry ... but I'm not sure of the best way to represent the grid)
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Postby CathyW » Thu Jan 26, 2006 4:49 pm

Sorry - it's difficult to work out what numbers are candidates and what are completed cells from this, but on the assumption that commas are separating candidates and double dashes are separating the cells, you seem to have two 7s in column 3.
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re: Need help with a simple puzzle

Postby Pat » Thu Jan 26, 2006 5:07 pm

5krunner wrote:I am at an impass with a fairly easy puzzle:
Code: Select all
4--5,6--8--1,5,6,7--3--1,2,5,6,7--1,2,5,7--9
1,2,5,7--1,2--7--1,2,6   9--1,2,5,6--8--1,2,5--4--3
1,2,9--5,9--3--1,5,7--4--1,2,5,7--6--8--1,2,5,7
7--1,2--5--3--1,6--9--4--2,6-8
3--8--9--2--1,5,6,7--4--1,5,7--5,6,7--1,5,6
6--1,2--4--8--1,5,7--1,5,7--9--3--   1,2,5,7
1,2,5--3--7--1,4,5,6--9--1,2,5,6--8--2,5,6--2,4,5,6
8--4--2,6--5,6,7--2,5,6,7--3--2,5,7--1--9
1,2,5,9--6,9--1,2,6--1,4,5,6,9--8--1,2,5,6,7--3--2,5,6,7--2,4,5,6,7


(sorry ... but I'm not sure of the best way to represent the grid)

i'd like you to please start by
listing only the known cells
(with a dot for an empty cell);

and do use [code] ... [/code]

- then it would be obvious that
you only showed us 8 cells in r1

and by the way,
you also have an error in r2

thanks!
~ Pat
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Postby 5krunner » Thu Jan 26, 2006 5:39 pm

Here's the "known" cell format:

Code: Select all

------+-------+-------+
4 x 8 | x 3 x | x 9 x |
x 7 x | 9 x 8 | x 4 3 |
x x 3 | x 4 x | 6 8 x |
------+-------+-------+
7 x 5 | 3 x 9 | 4 x 8 |
3 8 9 | 2 x 4 | x x x |
6 x 4 | 8 x x | 9 3 x |
------+-------+-------+
x 3 7 | x 9 x | 8 x x |
8 4 x | x x 3 | x 1 9 |
x x x | x 8 x | 3 x x |
------+-------+-------+

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Postby Pat » Thu Jan 26, 2006 5:57 pm

5krunner wrote:
Code: Select all
 4 . 8 | . 3 . | . 9 .
 . 7 . | 9 . 8 | . 4 3
 . . 3 | . 4 . | 6 8 .
-------+-------+------
 7 . 5 | 3 . 9 | 4 . 8
 3 8 9 | 2 . 4 | . . .
 6 . 4 | 8 . . | 9 3 .
-------+-------+------
 . 3 7 | . 9 . | 8 . .
 8 4 . | . . 3 | . 1 9
 . . . | . 8 . | 3 . .


the 6 for box 5
is in c5

so,
the 6 for r2
can't be in c5

~ Pat
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Postby 5krunner » Thu Jan 26, 2006 6:06 pm

Wow. That all it took since that uncovers a naked pair in r2! Thank u!
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re(3): Need help with a simple puzzle

Postby Pat » Thu Jan 26, 2006 6:09 pm

5krunner wrote:Wow. That all it took since that uncovers a naked pair in r2! Thank u!
actually no duo is needed
(it's a Medium puzzle)

we've just placed the r2 6 at c3,
now the c2 6 is at r9---

~ Pat
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