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X-Treme Dec 10

 
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emm
Hooked
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Joined: 11 Oct 2006
Posts: 34

PostPosted: Sun Dec 10, 2006 7:54 pm    Post subject: X-Treme Dec 10 Reply with quote

Any hints for getting over this hump?

4 or 9 must be in r5c89 but how to figure this out without using brute force?

Code:
+---------------+---------------+------------------+
| 2   3    6    |  5   9   1   | 8    7      4     |
| 49  1    49   |  8   2   7   | 5    6      3     |
| 5   8    7    |  3   6   4   | 9    12     12    |
+---------------+--------------+-------------------+
| 8   45   129  |  6   14  3   | 12   12459  7     |
| 69  246  1239 |  7   8   5   | 36   1249   129   |
| 7   456  13   |  2   14  9   | 36   145    8     |
+---------------+--------------+-------------------+
| 3   69   5    |  1   7   2   | 4    8      69    |
| 46  7    24   |  9   5   8   | 12   3      126   |
| 1   29   8    |  4   3   6   | 7    29     5     |
+---------------+--------------+-------------------+
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Ruud
Site Owner
Site Owner


Joined: 30 Dec 2005
Posts: 601

PostPosted: Sun Dec 10, 2006 9:13 pm    Post subject: Reply with quote

There is an XY-chain that eliminates digit 9 from r5c9:
Code:

(9=6)r7c9-(6=9)r7c2-(9=2)r9c2-(2=4)r8c3-(4=6)r8c1-(6=9)r5c1

if you prefer it in Nice Loop notation:
Code:

[r5c9]-9-[r7c9]-6-[r7c2]-9-[r9c2]-2-[r8c3]-4-[r8c1]-6-[r5c1]-9-[r5c9] => [r5c9]<>9

It's singles all the way from there.

Ruud
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“If the human brain were so simple that we could understand it, we would be so simple that we couldn't.” - Emerson M Pugh
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emm
Hooked
Hooked


Joined: 11 Oct 2006
Posts: 34

PostPosted: Mon Dec 11, 2006 8:01 am    Post subject: Reply with quote

Thanks Smile
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