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Feb 10 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 942
Location: Rimini, Italy
PostPosted: Fri Feb 09, 2018 11:13 pm    Post subject: Feb 10 VH Reply with quote
Hi everyone,

Code:

+-------------+------------+------------+
| 34   7   6  | 8    1 5   | 2  34  9   |
| 5    14  8  | 9    2 34  | 13 7   6   |
| 2349 149 23 | 34   6 7   | 8  345 15  |
+-------------+------------+------------+
| 69   69  5  | 7    8 2   | 4  1   3   |
| 8    3   7  | 14   9 14  | 6  25  25  |
| 1    2   4  | 5    3 6   | 9  8   7   |
+-------------+------------+------------+
| 236  5   9  | 1236 4 138 | 7  236 128 |
| 7    8   23 | 1236 5 9   | 13 236 4   |
| 2346 46  1  | 236  7 38  | 5  9   28  |
+-------------+------------+------------+

Play this puzzle online at the Daily Sudoku site

Quote:
W-Wing 3,4 in r1c1,r3c4 connected by number 4 in r2c26 and -3 in r3c13
or
W-Wing 3,4 in r1c8,r3c4 connected by number 3 in r2c67 and -4 in r3c8
or
XY-Wing 1,3,4 in r1c8,r2c27 and -4 in r1c1
or
XY-Wing 1,3,4 in r1c1,r2c27 and -3 in r1c8


Ciao Gianni
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immpy



Joined: 06 May 2017
Posts: 571
PostPosted: Sat Feb 10, 2018 12:08 am    Post subject: Reply with quote
Did I spot another XY-Wing in a Very Hard?? I sure did...two of them in fact.
Take your pick 1-34 or 13-4, first one pivots @r2c2; second one pivots @r2c7.

cheers...immp
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
PostPosted: Sat Feb 10, 2018 6:04 am    Post subject: Reply with quote
Code:
┌────────────────────┬────────────────────┬────────────────────┐
│   34      7      6 │    8      1      5 │    2     34      9 │
│                    │                    │                    │
│    5     14      8 │    9      2     34 │   13      7      6 │
│                    │                    │                    │
│ 2349    149     23 │   34      6      7 │    8    345     15 │
├────────────────────┼────────────────────┼────────────────────┤
│   69     69      5 │    7      8      2 │    4      1      3 │
│                    │                    │                    │
│    8      3      7 │   14      9     14 │    6     25     25 │
│                    │                    │                    │
│    1      2      4 │    5      3      6 │    9      8      7 │
├────────────────────┼────────────────────┼────────────────────┤
│  236      5      9 │ 1236      4    138 │    7    236    128 │
│                    │                    │                    │
│    7      8     23 │ 1236      5      9 │   13    236      4 │
│                    │                    │                    │
│ 2346     46      1 │  236      7     38 │    5      9     28 │
└────────────────────┴────────────────────┴────────────────────┘


Kite (1) hinged b3
1r2c2=r7c9
1r2c2-(1=34)r2c76
1r7c9-(1=528)r359c9-(8=3)r9c6-(3=4)r2c6=> 4r2c6
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Ajò Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
PostPosted: Sat Feb 10, 2018 12:48 pm    Post subject: Reply with quote
Hi everyone,

[(3-4)R1C8=4R3C8-4R3C4 and 3R1C8-3R1C1=3R3C13-3R3C4]=>contradiction R3C4=Ø=>-3R1C8=>solution.

Ciao a Tutti

Paolo
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