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Jun 28 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 868
Location: Rimini, Italy

PostPosted: Tue Jun 27, 2017 10:39 pm    Post subject: Jun 28 VH Reply with quote

Hi everyone,

Code:

+-----------+-------------+-----------+
| 26 29 368 | 139 4   169 | 7  89  5  |
| 5  49 346 | 7   8   69  | 1  2   34 |
| 1  7  348 | 5   39  2   | 38 489 6  |
+-----------+-------------+-----------+
| 8  1  5   | 4   23  7   | 9  6   23 |
| 4  6  7   | 39  239 8   | 23 5   1  |
| 23 23 9   | 6   1   5   | 4  7   8  |
+-----------+-------------+-----------+
| 9  5  46  | 8   7   3   | 26 1   24 |
| 7  8  1   | 2   6   4   | 5  3   9  |
| 36 34 2   | 19  5   19  | 68 48  7  |
+-----------+-------------+-----------+

Play this puzzle online at the Daily Sudoku site

many solutions this time too

Quote:
W-Wing 3,9 in r3c5,r5c4 connected by number 3 in r35c7 and -9 in r1c4 and r5c5;
XY-Wing 3,8,9 in r3c57, r1c8 and -9 in r1c46 and r3c8;
and some Skyscraper for example
with number 4 in r3c38, r7c39 and -4 in r2c9 and r9c8.


Ciao Gianni
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy

PostPosted: Wed Jun 28, 2017 11:15 am    Post subject: Reply with quote

Hi everyone

My solution
Forcing chain [ (3-8)R1C3=(8)R3C3-(8)R3C7 and (3)R1C3-(3)R1C4=(3)R3C5-(3)R3C7]=>contradiction R3C7=Ø=>-3R1C3=> solution stte.


Ciao a tutti
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dongrave



Joined: 06 Mar 2014
Posts: 563

PostPosted: Thu Jun 29, 2017 1:27 am    Post subject: Reply with quote

Of course the 'standard' solution (involving only X, XY, or XYZ wings), the solution would be the 38-9 XY Wing with pivot at r3c7 removing the 9 from r3c8 (and r1c46).
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