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Sep 10 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy
PostPosted: Sat Sep 10, 2022 9:15 am    Post subject: Sep 10 VH Reply with quote
Hi everyone,

Code:

+-----------+--------+--------+
| 46 2  18  | 46 5 3 | 9 18 7 |
| 3  58 458 | 9  1 7 | 2 48 6 |
| 7  16 9   | 46 8 2 | 3 14 5 |
+-----------+--------+--------+
| 46 68 48  | 5  2 1 | 7 3  9 |
| 1  9  7   | 3  6 8 | 4 5  2 |
| 5  3  2   | 7  9 4 | 1 6  8 |
+-----------+--------+--------+
| 8  15 15  | 2  3 9 | 6 7  4 |
| 2  7  6   | 1  4 5 | 8 9  3 |
| 9  4  3   | 8  7 6 | 5 2  1 |
+-----------+--------+--------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing
1,5,8 in r1c3,r27c2 and -1 in r3c2,r7c3
1,6,8 in r1c3,r34c2 and -8 in r2c2,r4c3
1,5,8 in r17c3,r2c2 and -5 in r2c3,r7c2
XYZ-Wing 4,5,8 in r2c23,r4c3 and -8 in r1c3
BUG+1 in r2c3 -4 -5 and r2c3=8
W-Wing 4,8 in r2c8,r4c3 SL with number 8 in r1c38 and -4 in r2c3


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 358
Location: Wales
PostPosted: Sat Sep 10, 2022 12:38 pm    Post subject: Another way Reply with quote
r3c8 = 1 to solve

Code:

+-------------+-----------+----------+
| 46  2   18  |  46  5  3 | 9  18  7 |
| 3  b58  458 |  9   1  7 | 2 a48  6 |
| 7  d16  9   | e46  8  2 | 3 x14  5 |
+-------------+-----------+----------+
| 46  68  48  |  5   2  1 | 7  3   9 |
| 1   9   7   |  3   6  8 | 4  5   2 |
| 5   3   2   |  7   9  4 | 1  6   8 |
+-------------+-----------+----------+
| 8  c15  15  |  2   3  9 | 6  7   4 |
| 2   7   6   |  1   4  5 | 8  9   3 |
| 9   4   3   |  8   7  6 | 5  2   1 |
+-------------+-----------+----------+

XY chain a-e gives pincers of <4> in a + e to remove <4> from x
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