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X-treme Nov 27 - ideas?

 
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sudokuEd
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Joined: 19 Jun 2006
Posts: 257
Location: Sydney Australia

PostPosted: Mon Nov 27, 2006 11:41 am    Post subject: X-treme Nov 27 - ideas? Reply with quote

Been staring blankly at this spot for ages - can't find anything. Any ideas? Surely that infestation has been exterminated by now?

Code:
.------------------.------------------.------------------.
| 167   346   13467| 4679  8     2    | 5     134   69   |
| 5     8     13467| 4679  3469  34679| 2     134   1469 |
| 2     9     346  | 5     346   1    | 7     8     46   |
:------------------+------------------+------------------:
| 169   2     1689 | 4679  14679 4689 | 1468  5     3    |
| 3     7     168  | 146   5     468  | 146   9     2    |
| 4     5     1689 | 136   2     369  | 168   7     18   |
:------------------+------------------+------------------:
| 79    1     2    | 8     349   3479 | 39    6     5    |
| 6789  346   5    | 13679 169   3679 | 1389  2     1478 |
| 689   346   34679| 2     1679  5    | 1389  14    147  |
'------------------'------------------'------------------'
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Ruud
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Joined: 30 Dec 2005
Posts: 601

PostPosted: Mon Nov 27, 2006 1:51 pm    Post subject: Reply with quote

There is a very simple coloring move to eliminate 3 from r8c2:
Code:
.------------------.------------------.------------------.
| 167   346   13467| 4679  8     2    | 5     134   69   |
| 5     8     13467| 4679  3469  34679| 2     134   1469 |
| 2     9     346  | 5     346   1    | 7     8     46   |
:------------------+------------------+------------------:
| 169   2     1689 | 4679  14679 4689 | 1468  5     3    |
| 3     7     168  | 146   5     468  | 146   9     2    |
| 4     5     1689 |A136   2     369  | 168   7     18   |
:------------------+------------------+------------------:
| 79    1     2    | 8     349   3479 | 39    6     5    |
| 6789 -346   5    |B13679 169   3679 | 1389  2     1478 |
| 689   346   34679| 2     1679  5    | 1389  14    147  |
'------------------'------------------'------------------'

The subsequent Locked_Candidates move will open things up a little.

Ruud
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sudokuEd
Grandmaster
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Joined: 19 Jun 2006
Posts: 257
Location: Sydney Australia

PostPosted: Tue Nov 28, 2006 6:15 am    Post subject: Reply with quote

Ruud wrote:
There is a very simple coloring move to eliminate 3 from r8c2:
It was simple - tricked by those diagonals again. Very Happy

The rest flowed out very nicely, with one more hold-up at the end. Thanks.

I like how you put the links to the relevant bit in Supopedia too. Very helpful.
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