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Dec 22 VH

 
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Clement



Joined: 24 Apr 2006
Posts: 1110
Location: Dar es Salaam Tanzania

PostPosted: Sat Dec 21, 2013 10:39 pm    Post subject: Dec 22 VH Reply with quote

Code:

+-----------+---------------+-------------+
| 4  689 9-8 | 2   16    5   | 3   *18  7   |
| 1  3   5  | 7   9     8   | 6   24  24  |
| 2  68  7  | 136 1346  34  | #18  9   5   |
+-----------+---------------+-------------+
| 5  89  4  | 689 68    1   | 2   7   3   |
| 3  7   *18 | 5   48    2   | #14  6   9   |
| 6  2   19 | 39  347   347 | 5   14  8   |
+-----------+---------------+-------------+
| 78 4   6  | 138 12378 37  | 9   5   12  |
| 78 1   2  | 4   5     9   | 78  3   6   |
| 9  5   3  | 18  1278  6   | 478 248 124 |
+-----------+---------------+-------------+
W-Wing 18 in BOX 34 with SL 1 in col 7; r1c3<>8; stte.
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hughwill



Joined: 05 Apr 2010
Posts: 422
Location: Birmingham UK

PostPosted: Sun Dec 22, 2013 10:52 am    Post subject: Dec 22 VH Reply with quote

Code:

+-----------+---------------+-------------+
| 4  689 89 | 2   16    5   | 3   18  7   |
| 1  3   5  | 7   9     8   | 6   24  24  |
| 2  68  7  | 136 1346  34  | 18  9   5   |
+-----------+---------------+-------------+
| 5  89  4  | 689 68    1   | 2   7   3   |
| 3  7   18 | 5   48    2   | 14  6   9   |
| 6  2   19 | 39  347   347 | 5   14  8   |
+-----------+---------------+-------------+
| 78 4   6  | 138 12378 37  | 9   5   12  |
| 78 1   2  | 4   5     9   | 78  3   6   |
| 9  5   3  | 18  1278  6   | 478 248 124 |
+-----------+---------------+-------------+

Play this puzzle online at the Daily Sudoku site

For a change I found the XY wing first- 189 pivot r2c3 setting
r6c8<> 1. But I did notice there's at least one more W wing- a 68
setting r4c2<>8 with all falling. I suspect there might be more.....
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Ema Nymton



Joined: 17 Apr 2009
Posts: 89

PostPosted: Mon Dec 23, 2013 8:34 am    Post subject: Reply with quote

.

Totally stumped.
'Hint' indicated column 2 row 8 = 1. Why?


Code:

+--------------+---------------+---------------+
| 4   689  689 | 2   16    5   | 3    18   7   |
| 1   3    5   | 7   9     8   | 6    24   24  |
| 2   68   7   | 136 1346  34  | 18   9    5   |
+--------------+---------------+---------------+
| 5   689  4   | 689 68    1   | 2    7    3   |
| 3   1678 168 | 5   4678  2   | 14   146  9   |
| 67  2    169 | 369 3467  347 | 5    146  8   |
+--------------+---------------+---------------+
| 678 4    16  | 138 12378 37  | 9    5    12  |
| 78  17   2   | 4   5     9   | 178  3    6   |
| 9   5    3   | 18  1278  6   | 1478 1248 124 |
+--------------+---------------+---------------+


Obviously I fail. Using basic steps I am only able to get to this point. What steps clear row 5, column2 and column 8?

This is one good puzzle.

Ema Nymton
~ @ : o ?
.
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hughwill



Joined: 05 Apr 2010
Posts: 422
Location: Birmingham UK

PostPosted: Mon Dec 23, 2013 10:54 am    Post subject: Dec 22 VH Reply with quote

Hi 'Ema': To get you going again- theres a sole candidate number in box
5 and a hidden pair in column 2 and the rest is sorted if you look
at column 9 and box 9 very closely........
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Ema Nymton



Joined: 17 Apr 2009
Posts: 89

PostPosted: Mon Dec 23, 2013 12:23 pm    Post subject: Re: Dec 22 VH Reply with quote

.

hughwill wrote:
Hi 'Ema': To get you going again- theres a sole candidate number in box
5 and a hidden pair in column 2 and the rest is sorted if you look
at column 9 and box 9 very closely........


Thank you. It was the block 9 '1s' that I missed. It was staring me in the face the whole time.

The 18/89/19 is a thing of beauty also.

Ema Nymton
~ @ : o ?
.
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