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Bern.B



Joined: 14 Dec 2012
Posts: 9
Location: Edmonton,Canada
PostPosted: Tue Feb 05, 2013 6:26 pm    Post subject: Help Reply with quote
Code:

+-------------+---------+---------------+
| 5    9 28   | 3  1 4  | 28   67  67   |
| 278  1 4    | 9  6 78 | 28   3   5    |
| 6    3 78   | 78 2 5  | 19   4   19   |
+-------------+---------+---------------+
| 39   4 6    | 1  7 39 | 5    2   8    |
| 137  2 137  | 5  8 6  | 1347 9   137  |
| 1379 8 5    | 2  4 39 | 137  167 1367 |
+-------------+---------+---------------+
| 1238 7 1238 | 6  9 18 | 13   15  4    |
| 4    5 189  | 78 3 2  | 6    17  179  |
| 139  6 139  | 4  5 17 | 1379 8   2    |
+-------------+---------+---------------+

Play this puzzle online at the Daily Sudoku site

Hello,
Today's puzzle in region 1 there is a hidden triple; 78, 28, 27.
This allows me to drop the 8 in 278, resulting in a hidden single 8 in c1.
Resulting in an 8 in r7,c1.
however when i place the 8 there and click GRADE, it shows TOO HARD.
Thanks in advance,
Bernie
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hughwill



Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
PostPosted: Wed Feb 06, 2013 10:34 am    Post subject: Help Reply with quote
Hi Bern B

The reason for your problem is that there isn't a hidden triple in Box 1.
But to solve this one you do need a hidden pair:
Quote:
28

and you can find that in column 1. By the way, on your grid you can put in the lone 4 in
box 6 and the lone 5 in box 9.

In the end r7c1 comes out as a 2. Grading a puzzle which has an wrong
number entered shows up as 'too hard' -useful for checking if you suspect
that you've made a mistake (as I often do!).

Hugh
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Bern.B



Joined: 14 Dec 2012
Posts: 9
Location: Edmonton,Canada
PostPosted: Wed Feb 06, 2013 3:26 pm    Post subject: Reply with quote
Dang! how could i have missed those.

Thanks Hugh
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