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Sept 23 VH

 
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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
PostPosted: Fri Sep 23, 2016 2:00 pm    Post subject: Sept 23 VH Reply with quote
M-wing on 38
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Fri Sep 23, 2016 3:05 pm    Post subject: Reply with quote
After basics:
Code:

+------------+-----------+-----------+
| 1   6   4  | 28 238 9  | 5  7   23 |
| 28  238 9  | 7  6   5  | 48 34  1  |
| 7   5   38 | 4  23  1  | 28 6   9  |
+------------+-----------+-----------+
| 89  89  2  | 3  4   7  | 6  1   5  |
| 6   4   7  | 1  5   2  | 3  9   8  |
| 3   1   5  | 6  9   8  | 7  2   4  |
+------------+-----------+-----------+
| 4   23  1  | 5  7   6  | 9  8   23 |
| 258 7   38 | 9  1   34 | 24 345 6  |
| 59  39  6  | 28 28  34 | 1  345 7  |
+------------+-----------+-----------+

Play this puzzle online at the Daily Sudoku site
Quote:
M-wing on 38

Nice to hear from you again Earl, but not so early as I remember! Very Happy
Long range 48-2 XY-wing pivot r8c7 also does the trick.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Fri Sep 23, 2016 9:16 pm    Post subject: Reply with quote
hughwill wrote:
After basics:
Code:

+------------+-----------+-----------+
| 1   6   4  | 28 238 9  | 5  7   23 |
| 28  238 9  | 7  6   5  | 48 34  1  |
| 7   5   38 | 4  23  1  | 28 6   9  |
+------------+-----------+-----------+
| 89  89  2  | 3  4   7  | 6  1   5  |
| 6   4   7  | 1  5   2  | 3  9   8  |
| 3   1   5  | 6  9   8  | 7  2   4  |
+------------+-----------+-----------+
| 4   23  1  | 5  7   6  | 9  8   23 |
| 258 7   38 | 9  1   34 | 24 345 6  |
| 59  39  6  | 28 28  34 | 1  345 7  |
+------------+-----------+-----------+

Play this puzzle online at the Daily Sudoku site
Quote:
M-wing on 38

Nice to hear from you again Earl, but not so early as I remember! Very Happy
Long range 48-2 XY-wing pivot r8c7 also does the trick.


I was unable to solve with standard VH moves. I don't see the 48-2 in r8c7. There is a 24-3 pivoted in that cell => -3r8c8, which doesn't make a dent. There are a few "flightless" XY -Wings.
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Sat Sep 24, 2016 9:21 am    Post subject: Reply with quote
Marty R. wrote:
I was unable to solve with standard VH moves. I don't see the 48-2 in r8c7.
There is a 24-3 pivoted in that cell => -3r8c8, which doesn't make a dent.
There are a few "flightless" XY -Wings.


No, you're right. The pivot was the 48 on r2c7. It removes the 2 in r8c1
forcing r7c2 (and r1c2) to =2 stte.

And I can't even claim I was still sleepy!

Hugh
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