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Jun 25 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy
PostPosted: Fri Jun 25, 2021 7:53 am    Post subject: Jun 25 VH Reply with quote
Hi everyone,

Code:

+-----------+---------------+-------------+
| 27 4  89  | 28   5    789 | 136  16 136 |
| 1  78 6   | 48   47   3   | 5    2  9   |
| 3  29 5   | 12   126  69  | 8    4  7   |
+-----------+---------------+-------------+
| 24 12 34  | 6    8    5   | 9    7  134 |
| 8  19 349 | 234  2347 47  | 1236 16 5   |
| 6  5  7   | 9    234  1   | 23   8  34  |
+-----------+---------------+-------------+
| 5  6  2   | 1348 134  48  | 7    9  18  |
| 9  3  18  | 7    16   68  | 4    5  2   |
| 47 78 148 | 5    9    2   | 16   3  168 |
+-----------+---------------+-------------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing 2,8,9 in r1c34,r3c2 and -2 in r1c1,r3c45
or
XY-Wing 2,7,8 in r1c14.r2c2 and -8 in r1c3,r2c4


Ciao Gianni
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Mogulmeister



Joined: 03 May 2007
Posts: 1151
PostPosted: Fri Jun 25, 2021 12:48 pm    Post subject: Reply with quote
Quote:
Using Gianni's grid I am going to be a bit like Tom here.

If you look at r1c3 and r1c4 which are next to each other.

If r1c3 is 8 then there is no 8 in r1c4.
if r1c3 is not 8 then that removes the 2in r1c1 which means no 8 in r1c4 either.

Either candidate removes 8 so r1c4<> 8 stte.
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TomC



Joined: 30 Oct 2020
Posts: 358
Location: Wales
PostPosted: Fri Jun 25, 2021 1:37 pm    Post subject: Reply with quote
Thanks Mogulmeister, I would have described it as

r1c4 <> 8 as then r1c3 = 9, r3c2 = 2 and then no two's in box 2
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Fri Jun 25, 2021 7:15 pm    Post subject: Reply with quote
Love the analogies. For me, the XY-Wings do the trick. Easier for me to see.

cheers...immp
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Fri Jun 25, 2021 7:19 pm    Post subject: Reply with quote
Actually it was the 27-8 XY-Wing that did it in my case.
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