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Jan 11 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 1019
Location: Rimini, Italy
PostPosted: Wed Jan 10, 2018 11:14 pm    Post subject: Jan 11 VH Reply with quote
Hi everyone,

Code:

+------------+------------+---------+
| 6  8    2  | 15 3  15   | 4  9  7 |
| 7  3    9  | 8  6  4    | 1  2  5 |
| 4  1    5  | 7  9  2    | 3  6  8 |
+------------+------------+---------+
| 59 6    47 | 3  2  8    | 79 45 1 |
| 8  45   3  | 16 17 1679 | 79 45 2 |
| 29 27   1  | 4  5  79   | 8  3  6 |
+------------+------------+---------+
| 25 2457 47 | 9  17 157  | 6  8  3 |
| 3  57   8  | 56 4  567  | 2  1  9 |
| 1  9    6  | 2  8  3    | 5  7  4 |
+------------+------------+---------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing 4,5,7 in r58c2,r7c3 and -4 in r4c3,r7c2
or
XY-Wing 2,5,7 in r7c1,r68c2 and -2 in r6c1,r7c2
or
XY-Wing 4,5,7 in r4c3,r58c2 and -7 in r6c2,r7c3


Ciao Gianni
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Thu Jan 11, 2018 5:44 am    Post subject: Reply with quote
Code:
┌────────────────────┬────────────────────┬────────────────────┐
│    6      8      2 │   15      3     15 │    4      9      7 │
│                    │                    │                    │
│    7      3      9 │    8      6      4 │    1      2      5 │
│                    │                    │                    │
│    4      1      5 │    7      9      2 │    3      6      8 │
├────────────────────┼────────────────────┼────────────────────┤
│   59      6     47 │    3      2      8 │   79     45      1 │
│                    │                    │                    │
│    8     45      3 │   16     17   1679 │   79     45      2 │
│                    │                    │                    │
│   29     27      1 │    4      5     79 │    8      3      6 │
├────────────────────┼────────────────────┼────────────────────┤
│   25   2457     47 │    9     17    157 │    6      8      3 │
│                    │                    │                    │
│    3     57      8 │   56      4    567 │    2      1      9 │
│                    │                    │                    │
│    1      9      6 │    2      8      3 │    5      7      4 │
└────────────────────┴────────────────────┴────────────────────┘


Kite (7) hinged b8
7r5c5=r8c2
7r5c5-(7=9)r5c7-(9=7)r4c7-(7=4)r4c3
7r8c2-(7=2)r6c2-(2=9)r6c1(9=5)r4c1-r4c8=r5c8-(5=74)r5c2,r4c3=> 4r4c3
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immpy



Joined: 06 May 2017
Posts: 574
PostPosted: Thu Jan 11, 2018 2:57 pm    Post subject: Reply with quote
....or the usual XY -Wing 45-7 pivoted r5c2.
r6c2<>7(=2) and r7c3<>7(=4)!

cheers, immp
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
PostPosted: Fri Jan 12, 2018 11:59 pm    Post subject: Reply with quote
After basics:

Code:
+----------------+----------------+----------------+
| 6    8    2    | 15   3    15   | 4    9    7    |
| 7    3    9    | 8    6    4    | 1    2    5    |
| 4    1    5    | 7    9    2    | 3    6    8    |
+----------------+----------------+----------------+
| 59   6    47   | 3    2    8    | 79   45   1    |
| 8    45   3    | 16   17   1679 | 79   45   2    |
| 29   27   1    | 4    5    79   | 8    3    6    |
+----------------+----------------+----------------+
| 25   2457 47   | 9    17   157  | 6    8    3    |
| 3    57   8    | 56   4    567  | 2    1    9    |
| 1    9    6    | 2    8    3    | 5    7    4    |
+----------------+----------------+----------------+

An X-wing - 7 and an XY-wing 45-7 do it.

Keith

Last edited by keith on Sun Jan 14, 2018 8:39 pm; edited 1 time in total
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Jan 13, 2018 12:36 am    Post subject: Reply with quote
Quote:
An X-wing - 7 and an XY-wing 45-7 do it.


Keith,

The XY does it, X-Wing not needed.
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