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Sep 7 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

PostPosted: Sun Sep 06, 2015 10:37 pm    Post subject: Sep 7 VH Reply with quote

Code:

+-------------+--------+------------+
| 8  6    5   | 9 3 2  | 4    7  1  |
| 7  12   12  | 4 5 8  | 36   9  36 |
| 3  4    9   | 6 7 1  | 2    8  5  |
+-------------+--------+------------+
| 15 7    16  | 2 8 49 | 1569 3  46 |
| 9  1235 123 | 7 6 34 | 15   45 8  |
| 4  8    36  | 5 1 39 | 69   2  7  |
+-------------+--------+------------+
| 6  9    7   | 3 4 5  | 8    1  2  |
| 15 135  4   | 8 2 7  | 35   6  9  |
| 2  35   8   | 1 9 6  | 7    45 34 |
+-------------+--------+------------+
XY-Wing 46-9 pivoted in r4c9; r6c6<>9; stte
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bat999



Joined: 09 Jul 2015
Posts: 55
Location: UK

PostPosted: Mon Sep 07, 2015 12:29 am    Post subject: Reply with quote

Code:
.---------------.------------.----------------.
| 8   6     5   | 9  3   2   | 4     7     1  |
| 7   12   b12  | 4  5   8   | 36    9     36 |
| 3   4     9   | 6  7   1   | 2     8     5  |
:---------------+------------+----------------:
| 15  7    b16  | 2  8   9-4 | 1569  3    c46 |
| 9   125  b123 | 7  6  a34  | 15    5-4   8  |
| 4   8     36  | 5  1   39  | 69    2     7  |
:---------------+------------+----------------:
| 6   9     7   | 3  4   5   | 8     1     2  |
| 15  135   4   | 8  2   7   | 35    6     9  |
| 2   35    8   | 1  9   6   | 7     45    34 |
'---------------'------------'----------------'
(4=3)r5c6 - (3=6)r245c3 - (6=4)r4c9 => -4 r4c6,r5c8; stte
Cool
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Mon Sep 07, 2015 5:12 am    Post subject: Reply with quote

The grid has a couple of cells with one extra candidate.

Also an XYZ-Wing (169) hinged in r4c7=> -6r4c9.
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK

PostPosted: Mon Sep 07, 2015 12:03 pm    Post subject: Reply with quote

After basics:
Code:

+------------+--------+------------+
| 8  6   5   | 9 3 2  | 4    7  1  |
| 7  12  12  | 4 5 8  | 36   9  36 |
| 3  4   9   | 6 7 1  | 2    8  5  |
+------------+--------+------------+
| 15 7   16  | 2 8 49 | 1569 3  46 |
| 9  125 123 | 7 6 34 | 15   45 8  |
| 4  8   36  | 5 1 39 | 69   2  7  |
+------------+--------+------------+
| 6  9   7   | 3 4 5  | 8    1  2  |
| 15 135 4   | 8 2 7  | 35   6  9  |
| 2  35  8   | 1 9 6  | 7    45 34 |
+------------+--------+------------+

Play this puzzle online at the Daily Sudoku site

I couldn't get rid of the 5 in r4c7 to see Marty's XYZ wing- except if r4c7 were
5 then r5c8=4 and r4c9=6. Then since r4c6 cannot be both of r4's needed 4 and 9
this answer is impossible. Therefore 5 can be removed from r4c7 and the
XYZ wing stands......or have I lost the plot somewhere?

Hugh
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Mon Sep 07, 2015 2:46 pm    Post subject: Reply with quote

Quote:
or have I lost the plot somewhere?


No, I have. Embarassed
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