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Unfair 092320

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immpy

Joined: 06 May 2017
Posts: 571

Posted: Wed Sep 23, 2020 6:10 pm Post subject: Unfair 092320

Hello all, enjoy the puzzle...

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp

dongrave

Joined: 06 Mar 2014
Posts: 568

Posted: Thu Sep 24, 2020 1:12 pm Post subject:

After basics:

Code:

+----------------+-------------------+-------------+
| 26 26 8 | 17 3 17 | 9 5 4 |
| 4 9 1 | 26 26 5 | 7 3 8 |
| 7 3 5 | 9 8 4 | 1 2 6 |
+----------------+-------------------+-------------+
| 29 247 479 | 23678 246 236789 | 5 1 379 |
| 8 57 6 | 357 1 379 | 34 49 2 |
| 1259 12457 3 | 257 245 279 | 8 6 79 |
+----------------+-------------------+-------------+
| 16 168 2 | 4 9 1368 | 36 7 5 |
| 1569 15678 79 | 123568 256 12368 | 346 49 139 |
| 3 1456 49 | 156 7 16 | 2 8 19 |
+----------------+-------------------+-------------+

5r5c2-r9c2=r9c4-r56c4=(5*-4)r6c5=(4-1)r6c2=r6c1-(1=6)r7c1-(6=3)r7c7-(3=4)r5c7-(34=6)r8c7-(5*6=2)r8c5-r2c5=r2c4-(25*=7)r6c4-(7=9)r6c9-(9=4)r5c8; contradiction (i.e. 4r5c78) => r5c2 <> 5; stte.

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