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Jul 05 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
PostPosted: Wed Jul 05, 2023 6:31 am    Post subject: Jul 05 VH Reply with quote
Hi everyone,

Code:

+-----------+----------+---------------+
| 5   49 3  | 6   7 2  | 8    149  149 |
| 1   7  8  | 34  5 9  | 34   2    6   |
| 49  6  2  | 348 1 48 | 3479 479  5   |
+-----------+----------+---------------+
| 8   1  6  | 479 2 47 | 5    3    49  |
| 2   49 49 | 5   8 3  | 16   16   7   |
| 479 3  5  | 479 6 1  | 49   8    2   |
+-----------+----------+---------------+
| 3   58 19 | 78  4 6  | 2    57   19  |
| 6   58 14 | 2   9 78 | 147  1457 3   |
| 49  2  7  | 1   3 5  | 469  469  8   |
+-----------+----------+---------------+

Play this puzzle online at the Daily Sudoku site

first step
X-Wing with number 4 in r26c47 and -4 in r3c47,r4c4,r89c7

Code:

+-----------+----------+--------------+
| 5   49 3  | 6   7 2  | 8   19   149 |
| 1   7  8  | 34  5 9  | 34  2    6   |
| 49  6  2  | 38  1 48 | 379 79   5   |
+-----------+----------+--------------+
| 8   1  6  | 79  2 47 | 5   3    49  |
| 2   49 49 | 5   8 3  | 16  16   7   |
| 479 3  5  | 479 6 1  | 49  8    2   |
+-----------+----------+--------------+
| 3   58 19 | 78  4 6  | 2   57   19  |
| 6   58 14 | 2   9 78 | 17  1457 3   |
| 49  2  7  | 1   3 5  | 69  469  8   |
+-----------+----------+--------------+

Play this puzzle online at the Daily Sudoku site

second step XY-Wing 1,6,9 in r59c7,r7c9 and -1 in r8c7

or with only one step from r7c9

if r7c9=1 -1 in r7c3,r8c78
if r7c9=9 - r4c9=4 - r3c6=4 - r9c1=4 - r8c3=1 and -1 in r7c3,r8c78

Ciao Gianni
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
PostPosted: Wed Jul 05, 2023 6:34 am    Post subject: Reply with quote
Obviously r6c1=7 from the beginning.

Ciao Gianni
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