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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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 Posted: Tue Mar 24, 2009 4:34 pm Post subject: Random Outlaw from Paul's Pages |
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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 |
+----------------+---------------+---------------+
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Play this puzzle online at the Daily Sudoku site |
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wapati
Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
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| Posted: Tue Mar 24, 2009 5:34 pm Post subject: |
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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
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| Posted: Tue Mar 24, 2009 6:08 pm Post subject: |
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| 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 Marty’s 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: 9’s 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: 5770
Location: Rochester, NY, USA
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| Posted: Tue Mar 24, 2009 11:57 pm Post subject: |
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| 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
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| Posted: Wed Mar 25, 2009 8:31 am Post subject: |
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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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