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wapati

Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.

Posted: Mon Jul 06, 2009 11:01 am Post subject: Swamp

Throw everything at it. It will stick.

Code:

. 1 7|3 . .|. . .
2 3 .|. 7 .|. . 9
. . 5|4 . .|. 3 .
-----+-----+-----
. . .|9 6 .|3 . .
. 4 .|. . .|. 5 .
. . 9|. 3 7|. . .
-----+-----+-----
. 6 .|. . 2|5 . .
5 . .|. 4 .|. 7 6
. . .|. . 3|4 9 .

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Mon Jul 06, 2009 8:49 pm Post subject:

Code:

.------------------.------------------.------------------.
|*469 1 7 | 3 289 *689 | 28 248 5 |
| 2 3 48 | 18 7 5 | 168 1468 9 |
|*69 89 5 | 4 1289 *1689 | 7 3 128 |
:------------------+------------------+------------------:
| 7 5 128 | 9 6 4 | 3 128 128 |
| 3 4 6 | 2 18 18 | 9 5 7 |
| 18 28 9 | 5 3 7 | 1268 1268 4 |
:------------------+------------------+------------------:
| 49 6 148 | 7 189 2 | 5 18 3 |
| 5 289 3 | 18 4 189 | 128 7 6 |
| 18 7 128 | 6 5 3 | 4 9 128 |
'------------------'------------------'------------------'

the UR {6,9} marked above says that neither the 4 in r1c1 nor the {1,8} pair in r135c6 can both be false...
grp = group

(9=4)r7c1 - UR69[(4)r1c1 = (18)r135c6] - {(grp18)=9}r8c6; r8c2 <> 9

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