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Dec 30 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
PostPosted: Sat Dec 30, 2023 10:20 am    Post subject: Dec 30 VH Reply with quote
Hi everyone,

Code:

+-------------+-----------+-----------+
| 6  3    25  | 25  1  8  | 9    4  7 |
| 57 1578 258 | 4   6  9  | 15   28 3 |
| 4  158  9   | 3   7  25 | 15   28 6 |
+-------------+-----------+-----------+
| 57 2    1   | 578 9  56 | 3678 37 4 |
| 3  57   6   | 1   58 4  | 78   9  2 |
| 8  9    4   | 27  3  26 | 67   1  5 |
+-------------+-----------+-----------+
| 9  58   358 | 568 2  7  | 4    36 1 |
| 1  4    578 | 568 58 3  | 2    67 9 |
| 2  6    37  | 9   4  1  | 37   5  8 |
+-------------+-----------+-----------+

Play this puzzle online at the Daily Sudoku site

Quote:
XYZ-Wing 5,7,8 in r4c14,r5c5 and -5 in r4c6


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 358
Location: Wales
PostPosted: Sat Dec 30, 2023 6:49 pm    Post subject: Reply with quote
Remove <2> from r6c4 to solve
Quote:
A short chain leads to a contradiction

If r6c4=2, r6c6=6, r4c6=5, r4c1=7 then no <7>'s in box 5
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