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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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 Posted: Tue Sep 30, 2014 9:56 am Post subject: Sep 30 VH |
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After Basics:
| Code: |
+------------+--------------+---------+
| 239 1 5 | 2369 69 7 | 8 26 4 |
| 4 6 23 | 1 8 23 | 9 5 7 |
| 279 79 8 | 269 4 5 | 1 26 3 |
+------------+--------------+---------+
| 6 35 7 | 4 59 39 | 2 1 8 |
| 1 4 29 | 8 569 269 | 7 3 59 |
| 235 8 239 | 239 7 1 | 6 4 59 |
+------------+--------------+---------+
| 59 59 1 | 7 2 4 | 3 8 6 |
| 8 2 4 | 69 3 69 | 5 7 1 |
| 37 37 6 | 5 1 8 | 4 9 2 |
+------------+--------------+---------+
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Play this puzzle online at the Daily Sudoku site
I needed 3 standard VH moves for this: X-Wing on 2 r35, 359 XY-Wing
pivot r4c2 and finally XY-wing 239 pivot r6c3 to set it. Haven't looked for
quicker ways but I'll be amazed if no one else comes up with one.....
Hugh |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Sep 30, 2014 12:05 pm Post subject: |
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Hugh,
look at 9's in row 4
then a skyscraper 3 removes a 3 in r6c3 then singles
for vh look for an xyz-wing 239 in r56c3 and r6c4 |
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hughwill
Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK
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| Posted: Tue Sep 30, 2014 1:42 pm Post subject: |
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| arkietech wrote: | Hugh,
look at 9's in row 4
then a skyscraper 3 removes a 3 in r6c3 then singles
for vh look for an xyz-wing 239 in r56c3 and r6c4 |
oops....  |
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George Woods
Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
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| Posted: Wed Oct 01, 2014 11:20 am Post subject: another 2 step solution? |
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| The X wing removes the 2 from r6c3 to give a w wing 39 operating on 9s in row 5 to eliminate 3 at r6c4 giving a 3 at r4c2 ...... |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Wed Oct 01, 2014 12:50 pm Post subject: |
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| Code: | +----------------+----------------+----------------+
| 239 1 5 | 2369 69 7 | 8 26 4 |
| 4 6 23 | 1 8 23 | 9 5 7 |
| 279 79 8 | 269 4 5 | 1 26 3 |
+----------------+----------------+----------------+
| 6 35 7 | 4 59 39 | 2 1 8 |
| 1 4 29 | 8 56 26 | 7 3 59 |
| 235 8 239 | 23 7 1 | 6 4 59 |
+----------------+----------------+----------------+
| 59 59 1 | 7 2 4 | 3 8 6 |
| 8 2 4 | 69 3 69 | 5 7 1 |
| 37 37 6 | 5 1 8 | 4 9 2 |
+----------------+----------------+----------------+ |
There are two XYZ-wings. Look at r6b4. One takes out 3 in r6c3, the other takes out 2 in r6c1. Either solves the puzzle,
Keith |
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vanessamanda
Joined: 10 Oct 2014
Posts: 1
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| Posted: Fri Oct 10, 2014 12:53 am Post subject: So hard |
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| I think you should give us the original puzzle so that we can discuss about the answer. Look at your code, I cannot give any solution. |
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