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A June Swoon VH++ 060224

 
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immpy



Joined: 06 May 2017
Posts: 571

PostPosted: Sun Jun 02, 2024 5:49 pm    Post subject: A June Swoon VH++ 060224 Reply with quote

Hello all, enjoy the puzzle.

Code:

+-------+-------+-------+
| . 7 2 | 3 . . | . 1 . |
| 9 . . | . . 6 | . 5 2 |
| 1 . . | . 7 . | . . . |
+-------+-------+-------+
| 7 . . | 8 4 . | . 2 . |
| . . 9 | 6 . 7 | 1 . . |
| . 2 . | . 3 1 | . . 7 |
+-------+-------+-------+
| . . . | . 9 . | . . 1 |
| 8 9 . | 7 . . | . 6 3 |
| . 1 . | . . 3 | 8 4 . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

cheers...immp
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TomC



Joined: 30 Oct 2020
Posts: 356
Location: Wales

PostPosted: Mon Jun 03, 2024 8:09 am    Post subject: Reply with quote

Remove <4> from r6c7 to solve
Code:

+-------------------+--------------+---------------+
|  6     7     2    |  3    5  49  | f49    1   8  |
|  9     34    34   |  1    8  6   |  7     5   2  |
|  1     58    58   |  249  7  249 |  3469 e39  46 |
+-------------------+--------------+---------------+
|  7     356   1    |  8    4  59  |  369   2   56 |
|  345   3458  9    |  6    2  7   |  1    d38  45 |
| a45    2     4568 | b59   3  1   | x469  c89  7  |
+-------------------+--------------+---------------+
|  2345  3456  3456 |  245  9  8   |  25    7   1  |
|  8     9     45   |  7    1  245 |  25    6   3  |
|  25    1     7    |  25   6  3   |  8     4   9  |
+-------------------+--------------+---------------+

Play this puzzle online at the Daily Sudoku site
Quote:
XY chain abcdef (45-59-89-38-39-49) gives pincers of <4> in a + f to remove <4> from x
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dongrave



Joined: 06 Mar 2014
Posts: 567

PostPosted: Wed Jun 05, 2024 5:51 pm    Post subject: Reply with quote

Thanks for the puzzle immp!
Code:
+-----------------+-------------+----------------+
|  6    7    2    | 3   5   49  | c49   1    8   |
|  9    34   34   | 1   8   6   |  7    5    2   |
|  1    58   58   | 249 7   249 |  3469 39  b46  |
+-----------------+-------------+----------------+
|  7   e356  1    | 8   4   59  | d369  2   a56* |
|  345  3458 9    | 6   2   7   |  1    38   45  |
| f45   2    4568 | 59  3   1   | g469  89   7   |
+-----------------+-------------+----------------+
|  2345 3456 3456 | 245 9   8   |  25   7    1   |
|  8    9    45   | 7   1   245 |  25   6    3   |
|  25   1    7    | 25  6   3   |  8    4    9   |
+-----------------+-------------+----------------+

Then I used the following chain to solve it: 6*r4c9-(6=4)r3c9-(4=9)r1c7-(6*9=3)r4c7-(36*=5)r4c2-(5=4)r6c1-(46*=9)r6c7 contradiction (i.e. 9r16c7) => r4c9 != 6; stte.
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