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VH+ 070125

 
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immpy



Joined: 06 May 2017
Posts: 574
PostPosted: Tue Jul 01, 2025 6:36 pm    Post subject: VH+ 070125 Reply with quote
Happy 4th all. Enjoy the puzzle.

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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dongrave



Joined: 06 Mar 2014
Posts: 572
PostPosted: Sat Jul 05, 2025 11:07 pm    Post subject: Reply with quote
Thanks for the puzzle immp! After the basics:
Code:
+-----------------+----------------+-----------------+
|  6    1   c24   | 9    2458 7    | 2458  45   3    |
|  79   3    79   | 458  2458 45   | 24568 1    68   |
|  5   d24   8    | 3    6    1    | 7     49  e249  |
+-----------------+----------------+-----------------+
|  8    247  3    | 45   9    245  | 1     6    2457 |
|  1    9    247  | 456  3    2456 | 245   8    2457 |
|  2-4  6    5    | 1    7    8    | 9     3   f24   |
+-----------------+----------------+-----------------+
|  27   27   1    | 4568 458  456  | 3     459  459  |
| a49   8   b469  | 7    45   3    | 456   2    1    |
|  3    5   b46   | 2    1    9    | 468   7    68   |
+-----------------+----------------+-----------------+

Then I used the following chain: (4=9)r8c1 - (9=4|6)r89c3 - (4=2)r1c3 - r3c2 = r3c9 - (2=4)r6c9 => r6c1 != 4; stte.
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TomC



Joined: 30 Oct 2020
Posts: 359
Location: Wales
PostPosted: Mon Jul 07, 2025 12:25 pm    Post subject: Reply with quote
Code:

+------------+----------------+----------------+
| 6  1  x24  | 9    2458 7    | 2458  45  3    |
| 79 3   79  | 458  2458 45   | 24568 1   68   |
| 5  24  8   | 3    6    1    | 7     49  249  |
+------------+----------------+----------------+
| 8  247 3   | 45   9    245  | 1     6   2457 |
| 1  9  -247 | 456  3    2456 | 245   8   2457 |
|x24 6   5   | 1    7    8    | 9     3   24   |
+------------+----------------+----------------+
| 27 27  1   | 4568 458  456  | 3     459 459  |
|.49 8  .469 | 7    45   3    | 456   2   1    |
| 3  5  .46  | 2    1    9    | 468   7   68   |
+------------+----------------+----------------+

Play this puzzle online at the Daily Sudoku site

remove <2> from r5c3 to solve

If r5c3 = 2, r1c3=4, r6c1=4 leads to no <4> in box 7
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storm_norm22



Joined: 24 Oct 2020
Posts: 21
PostPosted: Wed Sep 03, 2025 3:09 pm    Post subject: Reply with quote
for those confused about tom's logic. hopefully this helps.
the chain would be something like this.
(2=4)r3c1 - (4)r89c3 = (4)r8c1 - (4=2)r6c1; eliminates the 2 in r5c3.
this is a W-wing


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