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kuskey
Joined: 10 Dec 2008
Posts: 141
Location: Pembroke, NH
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 Posted: Mon Jun 23, 2014 4:52 am Post subject: Jun 23 VH |
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| Using basic tools, all I found was a 358 xy-wing rsc2 pivot setting r6c1<>8 and r5c6<>8. Lots of pairs to check. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Jun 23, 2014 4:56 am Post subject: |
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| Code: |
+-----------+------------+---------+
| 3 7 2 | 8 1 6 | 4 5 9 |
| 1 8 4 | 35 9 35 | 6 7 2 |
| 6 9 5 | 2 7 4 | 1 3 8 |
+-----------+------------+---------+
| 589 2 7 | 6 4 589 | 3 89 1 |
| 4 6 38 | 1 2 389 | 7 89 5 |
| 589 35 1 | 359 58 7 | 2 6 4 |
+-----------+------------+---------+
| 7 35 38 | 4 58 2 | 9 1 6 |
| 2 1 6 | 59 3 589 | 58 4 7 |
| 58 4 9 | 7 6 1 | 58 2 3 |
+-----------+------------+---------+
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Play this puzzle online at the Daily Sudoku site
Same. |
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rmireland
Joined: 21 Sep 2013
Posts: 33
Location: New Orleans
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| Posted: Mon Jun 23, 2014 10:50 pm Post subject: |
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| Interesting puzzle in that the only elimination (other than sweeping) is this XY, and then only for the 8 in R6C1. (There is an X-wing on 5 in C25 but it leads nowhere.) All other values are set because only possible choices in rows, columns, boxes and squares. I think that if this puzzle did not have the XY, then it would be rated as Easy. |
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Lee
Joined: 10 Jun 2014
Posts: 24
Location: San Francisco
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| Posted: Tue Jun 24, 2014 2:23 am Post subject: |
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rmireland expressed my sentiments so I looked for any other way to solve this puzzle. I did come up with a nice loop which dodges around the xy wing. I hope I didn't make any mistakes.
r6c1=9=r6c4-9-r8c4-5-r7c5=5=r7c2-5-r6c2-3-r5c3-8-r6c1
therefore r6c1<>8
same elimination as with the xy wing but a lot more work |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Jun 24, 2014 11:10 am Post subject: |
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| A skyscraper on 8 sets r5c3 to 3 and r9c1 to 5 solving the puzzle. |
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