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Feb 20 VH

 
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ZeroAssoluto



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

PostPosted: Sun Feb 20, 2022 10:55 am    Post subject: Feb 20 VH Reply with quote

Hi everyone,

Code:

+--------------+---------+----------------+
| 27    6   3  | 8 1  5  | 4    279  29   |
| 24578 578 45 | 3 26 9  | 1    2678 268  |
| 28    9   1  | 4 7  26 | 268  5    3    |
+--------------+---------+----------------+
| 456   15  9  | 7 8  26 | 3    246  1246 |
| 3     78  46 | 9 26 1  | 2678 2468 5    |
| 678   178 2  | 5 4  3  | 678  689  1689 |
+--------------+---------+----------------+
| 56    4   56 | 2 3  8  | 9    1    7    |
| 1     3   8  | 6 9  7  | 5    24   24   |
| 9     2   7  | 1 5  4  | 68   3    68   |
+--------------+---------+----------------+

Play this puzzle online at the Daily Sudoku site

Quote:
Skyscraper with number 2 in r25c5,r35c7 and -2 in r2c89,r3c6
or
Skyscraper with number 2 in r34c6,r35c7 and -2 in r4c89,r5c5
or
W-Wing 2,6 in r3c6,r5c5 SL with number 2 in r35c7 and -6 in r2c5,r4c6


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 349
Location: Wales

PostPosted: Sun Feb 20, 2022 11:09 am    Post subject: Reply with quote

Look at box 4

If r4c2 = 1 then r4c1=5, r7c1=6 and r6c1 = <78>
also r56c2 would be <78> as well

We have a <78> "triple" which is impossible, so r4c2 = 5

Or you could start with r4c1= 5 and see the same result
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dongrave



Joined: 06 Mar 2014
Posts: 563

PostPosted: Sun Feb 20, 2022 1:34 pm    Post subject: Reply with quote

The standard VH move that I used was the 456 XYZ-Wing with pivot at r4c1 (-6r6c1).
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