SudoCue Users
A forum for users of the SudoCue programs and the services of SudoCue.Net

Author Message
emm
Hooked

Joined: 11 Oct 2006
Posts: 34

Posted: Sun Dec 10, 2006 7:54 pm    Post subject: X-Treme Dec 10

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     | +---------------+--------------+-------------------+
Ruud
Site Owner

Joined: 30 Dec 2005
Posts: 601

Posted: Sun Dec 10, 2006 9:13 pm    Post subject:

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

Joined: 11 Oct 2006
Posts: 34

 Posted: Mon Dec 11, 2006 8:01 am    Post subject: Thanks
 Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First
 All times are GMT Page 1 of 1

 Jump to: Select a forum SudoCue - the Website----------------Daily Sudoku Nightmare & ArchiveClueless SpecialsClueless ExplosionsWeekly AssassinsTexas Jigsaw KillersSudoku LiteX-FilesDaily WindokuDaily Jigsaw SudokuSolving Guide & GlossarySamurai ContestGeneral Website Comments Sudoku - the Community----------------Help Me! I'm stuck!Solving Techniques & TipsWebsitesSoftwarePuzzlesPublicationsOff-Topic SudoCue - the Software----------------SupportWishlistCommentsReleases
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum