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VH+ 030524

 
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immpy



Joined: 06 May 2017
Posts: 571

PostPosted: Tue Mar 05, 2024 5:32 pm    Post subject: VH+ 030524 Reply with quote

Hello all, enjoy the puzzle.

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp
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dongrave



Joined: 06 Mar 2014
Posts: 568

PostPosted: Wed Mar 06, 2024 6:36 pm    Post subject: Reply with quote

As usual, thanks for the puzzle immp! After basics:

Code:
+------------------+----------------+---------------+
|  7    6     9    |  245  245  8   | 2345 2345 1   |
|  24   8    f45   |  3    7    1   | 9    245  6   |
|  1234 1345  1345 |  9    245  6   | 8    7    24  |
+------------------+----------------+---------------+
| a3*4  7     6    |  245 b2345 24  | 1    9    8   |
|  9    134   8    |  6   c1234 7   | 245  245  234 |
|  5    2    e134  | d14   8    9   | 7    6    34  |
+------------------+----------------+---------------+
|  8    134   7    | i124  9    24  | 6    1234 5   |
|  6    145  g145  |  7   h124  3   | 24   8    9   |
|  134  9     2    |  8    6    5   | 34   134  7   |
+------------------+----------------+---------------+

Then I used the chain 3*r4c1-r4c5=(3-1)r5c5=r6c4-(13*=4)r6c3-(4=5)r2c3-(45=1)r8c3-r8c5=r7c4 contradiction (i.e. 1r67c4) => r4c1 != 3; stte.
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