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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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 Posted: Tue Oct 07, 2008 2:39 am Post subject: Oct 7 VH |
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Friendly skies on a W-wing (56).
Earl |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Oct 07, 2008 3:54 am Post subject: Re: Oct 7 VH |
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| Earl wrote: | Friendly skies on a W-wing (56).
Earl |
Ditto. |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Tue Oct 07, 2008 6:39 am Post subject: |
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... or overlapping xy-wings again (568 boxes 4,6)
(this time it doesn't matter which one to take, they have the same effect)
So little of the puzzle left after basics...  |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Oct 07, 2008 11:53 am Post subject: |
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| A simple kite solved it for me. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Tue Oct 07, 2008 12:41 pm Post subject: |
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| For me, an ER on <6> using R6 & B7 to remove <6> from R7C6. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Tue Oct 07, 2008 1:05 pm Post subject: |
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I was also a kite flier.
Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Oct 07, 2008 3:49 pm Post subject: |
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| I tried it a second time. There was an XY-Wing on 568 which didn't take me too far. I didn't use it but there was a Finned X-Wing on 6 which solved it. |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Tue Oct 07, 2008 4:54 pm Post subject: Daily Sudoku: Tue 7-Oct-2008 VH |
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| XY-Wing <568> Pivot {5,6}r5c3 eliminating 8 in r6c8 and the puzzle is solved. |
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crunched
Joined: 05 Feb 2008
Posts: 168
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| Posted: Wed Oct 08, 2008 2:56 am Post subject: |
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| Code: |
+--------------+---------------+------------+
| 6 7 2 | 39 349 8 | 5 134 134 |
| 5 34 9 | 6 1 2 | 8 7 34 |
| 348 1 348 | 35 345 7 | 9 6 2 |
+--------------+---------------+------------+
| 7 349 345 | 159 8 159 | 6 2 35 |
| 2 689 568 | 4 569 3 | 1 58 7 |
| 38 368 1 | 7 2 56 | 4 358 9 |
+--------------+---------------+------------+
| 1 2 346 | 8 3569 569 | 7 459 456 |
| 389 5 368 | 139 7 4 | 2 19 16 |
| 49 469 7 | 2 569 1569 | 3 1459 8 |
+--------------+---------------+------------+
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Play this puzzle online at the Daily Sudoku site
An x-wing of 8s in columns 2 and 8 eliminates an 8 in C1,R6;
It also takes out an 8 in C3,R5.
This results as follows:
| Code: |
+------------+---------------+------------+
| 6 7 2 | 39 349 8 | 5 134 134 |
| 5 34 9 | 6 1 2 | 8 7 34 |
| 48 1 348 | 35 345 7 | 9 6 2 |
+------------+---------------+------------+
| 7 49 45 | 159 8 159 | 6 2 35 |
| 2 689 56 | 4 569 3 | 1 58 7 |
| 3 68 1 | 7 2 56 | 4 58 9 |
+------------+---------------+------------+
| 1 2 346 | 8 3569 569 | 7 459 456 |
| 89 5 368 | 139 7 4 | 2 19 16 |
| 49 469 7 | 2 569 1569 | 3 1459 8 |
+------------+---------------+------------+
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Play this puzzle online at the Daily Sudoku site
This opens up an xy wing 68-56-58 with 56 as pivot...and the puzzle gets solved. |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Wed Oct 08, 2008 5:27 am Post subject: |
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| crunched wrote: | An x-wing of 8s in columns 2 and 8 eliminates an 8 in C1,R6;
It also takes out an 8 in C3,R5.
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Alternatively, there are a few things that can still be achieved using more basic means:
9 in r9c2: in col 1, 9 is confined to r89c1.
8 in r6c1,r5c3: 8 in col 2 confined to r56c2.
This leaves a naked 3 in r6c1, which in turn solves a whole bunch of cells, until we get to this point:
| Code: |
+--------------------------+--------------------------+--------------------------+
| 6 7 2 | 9 4 8 | 5 3 1 |
| 5 3 9 | 6 1 2 | 8 7 4 |
| 48 1 48 | 35 35 7 | 9 6 2 |
+--------------------------+--------------------------+--------------------------+
| 7 49 45 | 15 8 159 | 6 2 3 |
| 2 689 56 | 4 569 3 | 1 58 7 |
| 3 68 1 | 7 2 56 | 4 58 9 |
+--------------------------+--------------------------+--------------------------+
| 1 2 346 | 8 369 69 | 7 49 5 |
| 89 5 38 | 13 7 4 | 2 19 6 |
| 49 46 7 | 2 569 1569 | 3 149 8 |
+--------------------------+--------------------------+--------------------------+
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DennyOR
Joined: 12 Sep 2007
Posts: 33
Location: Portland, Oregon
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| Posted: Wed Oct 08, 2008 7:23 pm Post subject: |
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| And from there the xy-chain 65-51-13-38-84-45-56 also solves it. |
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