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Jan 16 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Wed Jan 16, 2013 7:50 am    Post subject: Jan 16 VH Reply with quote
Code:

+------------+----------+--------------+
| 4  9    8  | 17 6  5  | 13 237  127  |
| 3  2    6  | 17 9  8  | 5  47   147  |
| 7  1    5  | 4  23 23 | 6  8    9    |
+------------+----------+--------------+
| 16 3567 4  | 23 8  9  | 13 2357 1267 |
| 9  36   2  | 5  1  7  | 8  34   46   |
| 18 3578 37 | 23 4  6  | 9  2357 127  |
+------------+----------+--------------+
| 26 3-467 37 | 8  23 1  | 47 9    5    |
| 28 478  1  | 9  5  24 | 47 6    3    |
| 5  -34   9  | 6  7  34 | 2  1    8    |
+------------+----------+--------------+
Hidden UR 47 in r78c27; r7c2<>4 opens
XYZ-Wing 367 hinged in r7c2; r9c2<>3 which solves it.
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
PostPosted: Wed Jan 16, 2013 8:45 am    Post subject: Reply with quote
Code:
after lcls
 *-----------------------------------------------------------*
 | 4     9     8     | 17    6     5     | 13    237   127   |
 | 3     2     6     | 17    9     8     | 5     47    147   |
 | 7     1     5     | 4     23    23    | 6     8     9     |
 |-------------------+-------------------+-------------------|
 |b16    3567  4     | 23    8     9     |a13    2357  1267  |
 | 9    c36    2     | 5     1     7     | 8     4-3   46    |
 | 18    3578  37    | 23    4     6     | 9     2357  127   |
 |-------------------+-------------------+-------------------|
 | 26    3467  37    | 8     23    1     | 47    9     5     |
 | 28    478   1     | 9     5     24    | 47    6     3     |
 | 5     34    9     | 6     7     34    | 2     1     8     |
 *-----------------------------------------------------------*
xy-wing
(3=1)r4c7-(1=6)r4c1-(6=3)r5c2 => -3r5c8; stte
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Wed Jan 16, 2013 10:24 am    Post subject: Jan 16 VH Reply with quote
Like arkietech, I saw the 136 xy first. The first step of Clement's solution
can be made using the 347 xy wing pivoted on r7c3 rather than the
47 UR (but I didn't see the XYZ follow-up).

Hugh
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Clement



Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
PostPosted: Thu Jan 17, 2013 10:00 am    Post subject: Re: Jan 16 VH Reply with quote
hughwill wrote:
Like arkietech, I saw the 136 xy first. The first step of Clement's solution
can be made using the 347 xy wing pivoted on r7c3 rather than the
47 UR (but I didn't see the XYZ follow-up).

Hugh
The 4 eliminated by the UR in r7c2 leaves 367 in r7c2(the hinge or the pivot). That eliminates 3 in r9c2. That is the XYZ-Wing 367.
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