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Random Outlaw from Paul's Pages

 
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Marty R.



Joined: 12 Feb 2006
Posts: 5123
Location: Rochester, NY, USA

PostPosted: Tue Mar 24, 2009 4:34 pm    Post subject: Random Outlaw from Paul's Pages Reply with quote

Lately these haven't been particularly challenging, but I've hit a wall on this one after an XYZ and Finned X-Wing.

Code:

+----------------+---------------+---------------+
| 468  468  7    | 5    1   89   | 3    4689 2   |
| 268  1    3468 | 2489 239 7    | 5    4689 489 |
| 9    2458 3458 | 248  23  6    | 1    7    48  |
+----------------+---------------+---------------+
| 46   4569 456  | 269  8   3    | 249  1    7   |
| 1    689  2    | 7    69  4    | 89   3    5   |
| 3    7    48   | 1    259 259  | 249  489  6   |
+----------------+---------------+---------------+
| 5    468  468  | 3    7   1    | 4689 2    489 |
| 2468 3    9    | 268  256 258  | 7    458  1   |
| 7    268  1    | 2689 4   2589 | 68   58   3   |
+----------------+---------------+---------------+

Play this puzzle online at the Daily Sudoku site
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wapati



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

PostPosted: Tue Mar 24, 2009 5:34 pm    Post subject: Reply with quote

SE rates this as an 8.9 out of about 12.

Here is a report, not based on the markup though,
based on the cells that were solved.

This Sudoku can be solved using the following logical methods:
40 x Hidden Single
1 x Direct Hidden Pair
1 x Naked Single
5 x Pointing
3 x Claiming
1 x Naked Pair
1 x XYZ-Wing
2 x XY-Wing
2 x Turbot Fish
1 x Forcing Chain
2 x Nishio Forcing Chains
3 x Cell Forcing Chains
5 x Region Forcing Chains
1 x Dynamic Region Forcing Chains

Sudoku Explainer gives a rating based on the single hardest step.
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ttt



Joined: 06 Dec 2008
Posts: 42
Location: vietnam

PostPosted: Tue Mar 24, 2009 6:08 pm    Post subject: Reply with quote

Code:
 *-----------------------------------------------------------*
 | 468   468   7     | 5     1     89    | 3     4689  2     |
 | 248   1     3468  | 2489  239   7     | 5     4689  489   |
 | 9     2458  3458  | 248   23    6     | 1     7     48    |
 |-------------------+-------------------+-------------------|
 | 46    4569  456   | 269   8     3     | 249   1     7     |
 | 1     689   2     | 7     69    4     | 89    3     5     |
 | 3     7     48    | 1     259   259   | 249   489   6     |
 |-------------------+-------------------+-------------------|
 | 5     468   468   | 3     7     1     | 4689  2     489   |
 | 2468  3     9     | 268   256   258   | 7     458   1     |
 | 7     268   1     | 2689  4     2589  | 68    58    3     |
 *-----------------------------------------------------------*

My path from Martyís grid:
01: Look at AUR(48)r23c49 => (9)r2c9=(8)r1c6
(ht468=9)r7c239-(9)r2c9=(8)r1c6-(8=hp46)r14c1-(4)r8c1=(4)r7c23 => r7c7<>4
02: 9ís r4c2=r5c2-r5c7=r6c8-r1c8=r1c6-r9c6=r9c4 => r4c4<>9, some singles and from here SS solver can finish this puzzle
Note: ht - hidden triple, hp - hidden pair

ttt
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Marty R.



Joined: 12 Feb 2006
Posts: 5123
Location: Rochester, NY, USA

PostPosted: Tue Mar 24, 2009 11:57 pm    Post subject: Reply with quote

Thanks. Based on those comments it's no surprise that I reached an impasse.
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Wed Mar 25, 2009 8:31 am    Post subject: Reply with quote

wow.
this is what I have so far.
(6=4)r4c1 - (4=8)r6c3 - (8)r6c8 = (8)r5c7 - (8=6)r9c7 - (6)r9c4 = (6)r8c45; r8c1 <> 6
(6=8)r9c7 - (8=9)r5c7 - (9)r5c2 = (9-5)r4c2 = (5-2)r3c2 = (2)r9c2; r9c2 <> 6
(4)r1c12 = (4)r1c8 - (4)r8c8 = (4)r8c1; r2c1 <> 4
xyz-wing {4,8,9} removes 8 from r6c7
ER 8 removes 8 from r7c3
still working...
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