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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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 Posted: Fri Apr 13, 2018 9:56 pm Post subject: Apr 14 VH |
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| Code: |
+--------+--------------+--------------+
| 5 69 4 | 17 1369 367 | 8 269 269 |
| 8 69 3 | 56 569 2 | 7 1 4 |
| 1 2 7 | 8 69 4 | 69 3 5 |
+--------+--------------+--------------+
| 3 1 9 | 56 4 56 | 2 7 8 |
| 7 4 5 | 3 2 8 | 169 69 169 |
| 6 8 2 | 9 7 1 | 5 4 3 |
+--------+--------------+--------------+
| 4 5 1 | 2 36 9 | 36 8 7 |
| 9 7 6 | 14 8 35 | 134 25 12 |
| 2 3 8 | 147 156 57-6| 1469 569 169 |
+--------+--------------+--------------+
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XY-Wing 35-6 pivoted in r8c6; r9c6 <> 6; stte |
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Ajò Dimonios
Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
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| Posted: Fri Apr 13, 2018 10:26 pm Post subject: |
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Hi everyone
| Code: |
+--------+----------------+--------------+
| 5 69 4 | 17 13 37 | 8 269 269 |
| 8 69 3 | 56 569 2 | 7 1 4 |
| 1 2 7 | 8 69 4 | 69 3 5 |
+--------+----------------+--------------+
| 3 1 9 | 56 4 56 | 2 7 8 |
| 7 4 5 | 3 2 8 | 169 69 169 |
| 6 8 2 | 9 7 1 | 5 4 3 |
+--------+----------------+--------------+
| 4 5 1 | 2 36 9 | 36 8 7 |
| 9 7 6 | 14 8 35 | 134 25 12 |
| 2 3 8 | 147 156 567 | 1469 569 169 |
+--------+----------------+--------------+
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Play this puzzle online at the Daily Sudoku site
[(5-6)R2C4=6R23C5-(6=3)R7C5 and 5R2C4-5R4C4=5R4C6-(5=3)R8C6]=>contradiction ( two 3 in Bloc 8 )=>-5R2C4 =>stte
Ciao a tutti Paolo |
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George Woods
Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
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| Posted: Sat Apr 14, 2018 1:22 pm Post subject: 356 wing |
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| Your use of the wing Clement sets r9c6 to not 6 But the wing at r4c6 can be extended (by 56s) to r2c4 so r3c5 becomes 9 and thereafter solution is easy |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Apr 14, 2018 2:44 pm Post subject: |
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| Quote: |
Your use of the wing Clement sets r9c6 to not 6 But the wing at r4c6 |
What wing is that, George? (I'm still looking). |
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George Woods
Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
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| Posted: Sun Apr 15, 2018 11:38 am Post subject: w wing solution |
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356 and the result of the extension is exactly the same as Clement's solution
since the 6''s confined to col 5 in box 8 give the same solution i.e r3c5=9 |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sun Apr 15, 2018 4:18 pm Post subject: Re: w wing solution |
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| George Woods wrote: | 356 and the result of the extension is exactly the same as Clement's solution
since the 6''s confined to col 5 in box 8 give the same solution i.e r3c5=9 |
George, I'm sorry, I'm just not understanding. In your first post you mentioned a wing at r4c6. I don't know what that means, At r4c6. I don't see anything there. In your 2nd post you entered "W-Wing solution" in the subject line and I can't find a W-Wing and I don't know what you mean by "356 and the result of the extension".
The only thing I can find in wings is a 35-6 XY-Wing pivoted at r8c6 which => -6r9c6. I don't know if that elimination does anything. If it doesn't we can do a pincer transport of the 6 from r4c6 to r2c1 which => -6r3c5.
Finally, I don't understand "6s confined to col 5 in box 8" since there is a 6 in r9c6.
P.S. Looking again at Clement's post, he is saying that his elimination at r9c6 solves the puzzle, thus no transport is necessary.
| Code: | +--------+--------------+--------------+
| 5 69 4 | 17 1369 367 | 8 269 269 |
| 8 69 3 | 56 569 2 | 7 1 4 |
| 1 2 7 | 8 69 4 | 69 3 5 |
+--------+--------------+--------------+
| 3 1 9 | 56 4 56 | 2 7 8 |
| 7 4 5 | 3 2 8 | 169 69 169 |
| 6 8 2 | 9 7 1 | 5 4 3 |
+--------+--------------+--------------+
| 4 5 1 | 2 36 9 | 36 8 7 |
| 9 7 6 | 14 8 35 | 134 25 12 |
| 2 3 8 | 147 156 57-6| 1469 569 169 |
+--------+--------------+--------------+ |
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George Woods
Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
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| Posted: Mon Apr 16, 2018 2:46 pm Post subject: |
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| The 356 is exactly the same as clement's except it can be extended since if r4c6 is 6 then r2c4 is 6 so the xy wing (with extension) takes out all the 6 in col4 of box 2 |
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Clement
Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania
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| Posted: Tue Apr 17, 2018 10:23 pm Post subject: Apr 14 VH |
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| George Woods wrote: | | The 356 is exactly the same as clement's except it can be extended since if r4c6 is 6 then r2c4 is 6 so the xy wing (with extension) takes out all the 6 in col4 of box 2 |
Eliminating 6 in r9c6 confines the 6's in BOX 8 in col 5 setting r3c5 to 9 and r2c5 to 5 which goes on solving the puzzle with singles to the end(stte). |
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RobertRattley
Joined: 24 Jun 2007
Posts: 118
Location: Australia
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| Posted: Sat Apr 21, 2018 3:07 pm Post subject: |
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| Further eliminations in box 2 (plus the xy wing) |
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