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Jan 31 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 1019
Location: Rimini, Italy
PostPosted: Tue Jan 30, 2018 11:25 pm    Post subject: Jan 31 VH Reply with quote
Hi everyone,

Code:

+-----------+----------+------------+
| 6   47 3  | 2  9  17 | 157 8   45 |
| 8   5  9  | 4  17 6  | 17  2   3  |
| 47  1  2  | 8  3  5  | 79  6   49 |
+-----------+----------+------------+
| 15  9  4  | 3  17 8  | 6   57  2  |
| 135 2  6  | 17 4  9  | 8   357 15 |
| 13  8  7  | 5  6  2  | 4   39  19 |
+-----------+----------+------------+
| 2   47 8  | 9  5  47 | 3   1   6  |
| 79  6  15 | 17 2  3  | 59  4   8  |
| 49  3  15 | 6  8  14 | 2   59  7  |
+-----------+----------+------------+

Play this puzzle online at the Daily Sudoku site

Quote:
W-Wing 1,5 in r4c1,r5c9 connected by number 1 in r6c19 and -5 in r5c1,r4c8
or
XY-Wing 1,5,7 in r4c8,r5c49 and -7 in r4c5,r5c8
or
XY-Wing 1,5,7 in r4c58,r5c9 and -1 in r5c4


Ciao Gianni
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Wed Jan 31, 2018 6:12 am    Post subject: Reply with quote
Code:
┌─────────────────┬─────────────────┬─────────────────┐
│   6    47     3 │   2     9    17 │ 157     8    45 │
│                 │                 │                 │
│   8     5     9 │   4    17     6 │  17     2     3 │
│                 │                 │                 │
│  47     1     2 │   8     3     5 │  79     6    49 │
├─────────────────┼─────────────────┼─────────────────┤
│  15     9     4 │   3    17     8 │   6    57     2 │
│                 │                 │                 │
│ 135     2     6 │  17     4     9 │   8   357    15 │
│                 │                 │                 │
│  13     8     7 │   5     6     2 │   4    39    19 │
├─────────────────┼─────────────────┼─────────────────┤
│   2    47     8 │   9     5    47 │   3     1     6 │
│                 │                 │                 │
│  79     6    15 │  17     2     3 │  59     4     8 │
│                 │                 │                 │
│  49     3    15 │   6     8    14 │   2    59     7 │
└─────────────────┴─────────────────┴─────────────────┘


XY-Wing (47-9) pivot r3c1
9r9c1=r3c7
9r9c1-(9=5)r9c8-(5=7)r4c8
9r3c7-r3c9=r6c9-(9=31)r6c81-(1=57)r4c18=> 7r4c8
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