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VH++ 033123

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immpy

Joined: 06 May 2017
Posts: 574

Posted: Fri Mar 31, 2023 6:31 pm Post subject: VH++ 033123

Hello all, enjoy the puzzle.

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp

dongrave

Joined: 06 Mar 2014
Posts: 572

Posted: Sat Apr 01, 2023 3:40 pm Post subject:

Thanks for the puzzle immp!

After basics:

Code:

+--------------+--------------+----------------+
| 46 34 2 | 9 5 67 | 17 3478 1348 |
| d569 1 39 | 8 4 e67 | f57 2 35 |
| 8 45 7 | 2 1 3 | 569 469 4569 |
+--------------+--------------+----------------+
| 2 357 1 | 567 9 4 | 8 36 356 |
| c59 8 39 | 56 2 1 | 4 369 7 |
| b579 6 4 | 57 3 8 | a59 1 2 |
+--------------+--------------+----------------+
| 17 2 5 | 4 678 9 | 3 678 168 |
| 147 9 8 | 3 67 2 | 167 5 146 |
| 3 47 6 | 1 78 5 | 2 4789 489 |
+--------------+--------------+----------------+

Then I used the chain: (5-9)r6c7=r6c1-(9=5)r5c1-(59=6)r2c1-(6=7)r2c6-(7=5)r2c7 contradiction => r6c7 <> 5; stte.

glesco

Joined: 12 May 2022
Posts: 39
Location: North Vancouver, BC, Canada

Posted: Sat Apr 01, 2023 7:03 pm Post subject:

fx-wing -3 r4c9 xy-chain -3 r4c2, r5c8 xy-wing -5 r4c2

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