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Jun 25th VH

 
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hughwill



Joined: 05 Apr 2010
Posts: 217
Location: Birmingham UK

PostPosted: Wed Jun 25, 2014 8:31 am    Post subject: Jun 25th VH Reply with quote

After basics:
Code:

+--------------+--------------+--------+
| 16   4   7   | 2   16   9   | 3 8 5  |
| 369  59  69  | 578 3468 456 | 2 1 79 |
| 1239 259 8   | 57  13   15  | 4 6 79 |
+--------------+--------------+--------+
| 4    6   3   | 9   5    8   | 1 7 2  |
| 5    7   12  | 6   12   3   | 8 9 4  |
| 8    29  129 | 4   7    12  | 6 5 3  |
+--------------+--------------+--------+
| 7    8   5   | 1   24   24  | 9 3 6  |
| 269  3   269 | 58  689  56  | 7 4 1  |
| 69   1   4   | 3   69   7   | 5 2 8  |
+--------------+--------------+--------+

Play this puzzle online at the Daily Sudoku site

The Attractive looking X wing on 6s doesn't appear to lead anywhere, but
a couple of old faithfuls sort it out: (select box to view solution)
Quote:
XY wing on 156 pivot c3r6 followed after some more
basics by a 125 XY wing - strangely with the same pivot!


A good test today.....


Hugh
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arkietech



Joined: 31 Jul 2008
Posts: 1728
Location: Northwest Arkansas USA

PostPosted: Wed Jun 25, 2014 10:50 am    Post subject: Reply with quote

Code:
 *-----------------------------------------------------------*
 | 16    4     7     | 2    c16    9     | 3     8     5     |
 | 369  b59    69    | 578   3468 *456   | 2     1     79    |
 | 1239  259   8     | 57    13    15    | 4     6     79    |
 |-------------------+-------------------+-------------------|
 | 4     6     3     | 9     5     8     | 1     7     2     |
 | 5     7     12    | 6    c12    3     | 8     9     4     |
 | 8    b29    129   | 4     7     1-2   | 6     5     3     |
 |-------------------+-------------------+-------------------|
 | 7     8     5     | 1     24   a24    | 9     3     6     |
 | 269   3     269   | 58    689   56    | 7     4     1     |
 | 69    1     4     | 3     69    7     | 5     2     8     |
 *-----------------------------------------------------------*
4r2c6-(4=2)r7c6
5r2c6-(5=2)r26c2
6r2c6-(6=2)r15c5 => -2r6c6; ste
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hughwill



Joined: 05 Apr 2010
Posts: 217
Location: Birmingham UK

PostPosted: Wed Jun 25, 2014 1:31 pm    Post subject: Jun 25th VH Reply with quote

Nice solution Dan! In fact it also looks like r2c6<>5- otherwise r3c6 would
be 1 and r6c6 would have to be 2- which is not possible due to the 29
59 pair in column 2.
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Marty R.



Joined: 12 Feb 2006
Posts: 5166
Location: Rochester, NY, USA

PostPosted: Wed Jun 25, 2014 4:01 pm    Post subject: Reply with quote

Same as Hugh's hidden solution.
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