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Sep 25 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
PostPosted: Mon Sep 25, 2023 9:26 am    Post subject: Sep 25 VH Reply with quote
Hi everyone,

Code:

+--------+---------+-------------+
| 23 9 8 | 47 1 6  | 24 5    37  |
| 12 4 7 | 8  5 3  | 6  12   9   |
| 13 5 6 | 47 9 2  | 48 138  137 |
+--------+---------+-------------+
| 5  8 4 | 6  3 9  | 1  7    2   |
| 7  2 1 | 5  8 4  | 3  9    6   |
| 9  6 3 | 1  2 7  | 5  4    8   |
+--------+---------+-------------+
| 4  7 5 | 9  6 18 | 28 1238 13  |
| 8  1 2 | 3  7 5  | 9  6    4   |
| 6  3 9 | 2  4 18 | 7  18   5   |
+--------+---------+-------------+

Play this puzzle online at the Daily Sudoku site

Quote:

XY-Wing 1,2,8 in r29c8,r7c7 and -2 in r1c7,r7c8
or
XYZ-Wing 1,3,7 in r13c9,r3c1 and -3 in r3c8
or
W-Wing 1,3 in r3c1,r7c9 SL with number 3 in r1c19 and -1 in r3c9
or
W-Wing 1,3 in r3c1,r7c9 SL with number 3 in r37c8 and -1 in r3c9


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 358
Location: Wales
PostPosted: Mon Sep 25, 2023 1:01 pm    Post subject: Re: Sep 25 VH Reply with quote
Remove <3> from r7c9 to solve

Code:

+--------+---------+-----------------+
| 23 9 8 | 47 1 6  | 24   5     a37  |
| 12 4 7 | 8  5 3  | 6   c12     9   |
| 13 5 6 | 47 9 2  | 48   138   b137 |
+--------+---------+-----------------+
| 5  8 4 | 6  3 9  | 1    7      2   |
| 7  2 1 | 5  8 4  | 3    9      6   |
| 9  6 3 | 1  2 7  | 5    4      8   |
+--------+---------+-----------------+
| 4  7 5 | 9  6 18 | 28   1238  x13  |
| 8  1 2 | 3  7 5  | 9    6      4   |
| 6  3 9 | 2  4 18 | 7    18     5   |
+--------+---------+-----------------+

Quote:
If x=3, a=7, b=1, c=2 leads to a <18> Unique Rectangle in r79c68
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