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VH+ 030524

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immpy

Joined: 06 May 2017
Posts: 570

Posted: Tue Mar 05, 2024 5:32 pm Post subject: VH+ 030524

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

dongrave

Joined: 06 Mar 2014
Posts: 564

Posted: Wed Mar 06, 2024 6:36 pm Post subject:

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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