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Puzzle VH_031

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Fri May 29, 2009 2:58 pm    Post subject: Puzzle VH_031 Reply with quote
Code:
 +-----------------------+
 | . . . | . . . | . . . |
 | . 8 . | 4 . . | . 6 5 |
 | . . 5 | . . . | 8 . 1 |
 |-------+-------+-------|
 | . 7 . | 8 . . | 6 . 9 |
 | . . . | . 4 . | . . 7 |
 | . . . | . . 7 | 5 1 . |
 |-------+-------+-------|
 | . . 8 | 1 . 3 | . . . |
 | . 9 . | . . 4 | . . 2 |
 | . 1 3 | 5 9 . | . 8 4 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Fri May 29, 2009 9:07 pm    Post subject: Reply with quote
I used three steps:
Quote:
x-wing 3
w-wing 2
xyz-wing 264
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Sat May 30, 2009 1:30 am    Post subject: Reply with quote
Dan, I hate to keep pickin on ya.
I can only assume that the w-wing you found was the one with {2,6} connected by the strong link on 2's in box 8.
that leads to the grid below where I don't see a xyz-wing.

Code:
.---------------------.---------------------.---------------------.
| 16     26     1269  | 2679   5      8     | 4      79     3     |
| 37     8      79    | 4      13     19    | 2      6      5     |
| 246    2346   5     | 23679  267    269   | 8      79     1     |
:---------------------+---------------------+---------------------:
| 123    7      12    | 8      13     5     | 6      4      9     |
| 8      5      16    | 69     4      169   | 3      2      7     |
| 9      36     4     | 236    26     7     | 5      1      8     |
:---------------------+---------------------+---------------------:
| 247    24     8     | 1      27     3     | 9      5      6     |
| 5      9      67    | 67     8      4     | 1      3      2     |
| 26     1      3     | 5      9      26    | 7      8      4     |
'---------------------'---------------------'---------------------'
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Sat May 30, 2009 1:33 am    Post subject: Reply with quote
here is a two step route.
Code:
.------------------------.------------------------.------------------------.
| 12679   26      12679  | 2679    5       8      | 4       79      3      |
| 379     8      *79     | 4       137    *19     | 2       6       5      |
| 234679  2346    5      | 23679   2367    269    | 8       79      1      |
:------------------------+------------------------+------------------------:
| 123     7       12     | 8       123     5      | 6       4       9      |
| 8       5      *169    | 69      4      *169    | 3       2       7      |
| 2369    236     4      | 2369    236     7      | 5       1       8      |
:------------------------+------------------------+------------------------:
| 247     24      8      | 1       27      3      | 9       5       6      |
| 5       9      *67     | 67      8       4      | 1       3       2      |
| 26      1       3      | 5       9       26     | 7       8       4      |
'------------------------'------------------------'------------------------'

above,
(6=7)r8c3 - (7=9)r2c3 - (9=1)r2c6 - (1)r5c6 = (1)r5c3; r5c3 <> 6

the x-wing 3 is there to finish it off.
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Sat May 30, 2009 11:23 am    Post subject: Reply with quote
Norm said:
Quote:
Dan, I hate to keep pickin on ya.

Norm I see strange things late at night. I need picking on. Embarassed

I like your two step solution. Very Happy
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