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Sep 06 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 632
Location: Rimini, Italy

PostPosted: Mon Sep 06, 2021 9:27 am    Post subject: Sep 06 VH Reply with quote

Hi everyone,

Code:

+------------+-----------+-----------+
| 4 12   8   | 9   6  12 | 7   3   5 |
| 3 1257 579 | 47  12 8  | 29  24  6 |
| 6 27   79  | 3   5  47 | 289 248 1 |
+------------+-----------+-----------+
| 8 67   367 | 56  23 25 | 4   1   9 |
| 5 46   346 | 1   7  9  | 236 26  8 |
| 2 9    1   | 468 38 46 | 36  5   7 |
+------------+-----------+-----------+
| 7 568  56  | 568 4  3  | 1   9   2 |
| 9 4568 456 | 2   18 15 | 68  7   3 |
| 1 3    2   | 678 9  67 | 5   68  4 |
+------------+-----------+-----------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing 3,6,8 in r6c57,r8c7 and -8 in r8c5
or
Skyscraper with number 6 in r69c6,r59c8 and -6 in r6c7


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 107
Location: Wales

PostPosted: Mon Sep 06, 2021 12:09 pm    Post subject: Reply with quote

Using the same cells in the skyscraper

Either r4c4 <> 6 as then no 6's in box 4
or r5c23 <> 6 as then no 6's in row 4
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Mogulmeister



Joined: 03 May 2007
Posts: 868

PostPosted: Wed Sep 08, 2021 7:28 am    Post subject: Reply with quote

Tom

If you put a 6 in r4c4 aren't we left with a 46 pair in r5 (box 4) ?
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TomC



Joined: 30 Oct 2020
Posts: 107
Location: Wales

PostPosted: Wed Sep 08, 2021 7:57 am    Post subject: Reply with quote

Mogulmeister wrote:
Tom

If you put a 6 in r4c4 aren't we left with a 46 pair in r5 (box 4) ?

This is what I saw

If r4c4 =6 then r9c6=6, r5c8=6 ==> no 6's in box 4, but if you travel a different road you will see something else!
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Mogulmeister



Joined: 03 May 2007
Posts: 868

PostPosted: Wed Sep 08, 2021 8:24 am    Post subject: Reply with quote

Fair enough ! The mark of a contradiction.
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