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Dec 22 VH

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Clement

Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

Posted: Sat Dec 21, 2013 10:39 pm Post subject: Dec 22 VH

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.

hughwill

Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK

Posted: Sun Dec 22, 2013 10:52 am Post subject: Dec 22 VH

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.....

Ema Nymton

Joined: 17 Apr 2009
Posts: 89

Posted: Mon Dec 23, 2013 8:34 am Post subject:

.

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 ?
.

hughwill

Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK

Posted: Mon Dec 23, 2013 10:54 am Post subject: Dec 22 VH

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........

Ema Nymton

Joined: 17 Apr 2009
Posts: 89

Posted: Mon Dec 23, 2013 12:23 pm Post subject: Re: Dec 22 VH

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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