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Jan 11 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 940
Location: Rimini, Italy
PostPosted: Wed Jan 11, 2023 10:55 am    Post subject: Jan 11 VH Reply with quote
Hi everyone,

Code:

+---------+-----------+--------------+
| 2  4  7 | 6   38 59 | 358 1   3589 |
| 5  1  8 | 2   34 49 | 7   6   39   |
| 9  3  6 | 58  1  7  | 2   4   58   |
+---------+-----------+--------------+
| 1  69 4 | 7   5  3  | 68  89  2    |
| 3  8  2 | 1   9  6  | 45  7   45   |
| 7  69 5 | 4   2  8  | 36  39  1    |
+---------+-----------+--------------+
| 48 2  3 | 9   6  45 | 1   58  7    |
| 48 5  9 | 38  7  1  | 348 2   6    |
| 6  7  1 | 358 48 2  | 9   358 348  |
+---------+-----------+--------------+

Play this puzzle online at the Daily Sudoku site

first step
W-Wing 4,8 in r8c1,r9c5 SL with number 4 in r7c16 and -8 in r8c4

Code:

+---------+----------+------------+
| 2  4  7 | 6  38 59 | 35 1  3589 |
| 5  1  8 | 2  34 49 | 7  6  39   |
| 9  3  6 | 58 1  7  | 2  4  58   |
+---------+----------+------------+
| 1  69 4 | 7  5  3  | 68 89 2    |
| 3  8  2 | 1  9  6  | 45 7  45   |
| 7  69 5 | 4  2  8  | 36 39 1    |
+---------+----------+------------+
| 48 2  3 | 9  6  45 | 1  58 7    |
| 48 5  9 | 3  7  1  | 48 2  6    |
| 6  7  1 | 58 48 2  | 9  35 34   |
+---------+----------+------------+

Play this puzzle online at the Daily Sudoku site

second step
XY-Wing 3,5,8 in r1c57,r3c4 and -5 in r1c6,r3c9

or in only one step
AIC in r1c5
ric5=8 and -8 in r1c79,r3c4
ric5=3 r9c5=8 r9c9=4 r5c9=5 r3c9=8 and -8 in r1c79,r3c4

Ciao Gianni
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dongrave



Joined: 06 Mar 2014
Posts: 568
PostPosted: Wed Jan 11, 2023 2:19 pm    Post subject: Reply with quote
I used the 45-8 XY-Wing at r7c68,r9c5 for the 1st step (-8 in r9c89, and -8 in r1c7 due to the 8 LC's in column 9) which opened up the 38-5 XY-Wing at r1c57,r3c4 for the 2nd step (-5 in r1c6,r3c9).

Last edited by dongrave on Wed Jan 11, 2023 2:27 pm; edited 2 times in total
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