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Dec 23 VH

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ZeroAssoluto

Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy

Posted: Sun Dec 23, 2018 8:48 am Post subject: Dec 23 VH

Hi everyone,

Code:

+--------------+------------------+---------------+
| 1 568 567 | 23789 4 2379 | 279 567 25789 |
| 58 9 2 | 6 78 1 | 3 4 578 |
| 3 4 67 | 289 289 5 | 1 67 289 |
+--------------+------------------+---------------+
| 5689 7 56 | 1 23689 239 | 29 35 4 |
| 89 38 4 | 23789 5 2379 | 6 1 2379 |
| 2 356 1 | 379 3679 4 | 79 8 3579 |
+--------------+------------------+---------------+
| 56 56 9 | 4 237 237 | 8 37 1 |
| 4 1 8 | 379 379 6 | 5 2 37 |
| 7 2 3 | 5 1 8 | 4 9 6 |
+--------------+------------------+---------------+

Play this puzzle online at the Daily Sudoku site

first step
W-Wing 5,6 in r4c3,r7c2 SL with number 6 in r47c1 and -5 in r6c2

after basic

Code:

+-------+----------+----------+
| 1 8 6 | 3 4 79 | 27 5 279 |
| 5 9 2 | 6 78 1 | 3 4 78 |
| 3 4 7 | 2 89 5 | 1 6 89 |
+-------+----------+----------+
| 8 7 5 | 1 6 29 | 29 3 4 |
| 9 3 4 | 8 5 27 | 6 1 27 |
| 2 6 1 | 79 3 4 | 79 8 5 |
+-------+----------+----------+
| 6 5 9 | 4 2 3 | 8 7 1 |
| 4 1 8 | 79 79 6 | 5 2 3 |
| 7 2 3 | 5 1 8 | 4 9 6 |
+-------+----------+----------+

Play this puzzle online at the Daily Sudoku site

BUG+1 r1c9=7

Ciao Gianni

RobertRattley

Joined: 24 Jun 2007
Posts: 118
Location: Australia

Posted: Wed Dec 26, 2018 2:51 pm Post subject:

Using only x- and xy- wings: x-wing 5 xy wing 568 and later xy wing 279

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