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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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 Posted: Wed Sep 06, 2017 5:52 am Post subject: VH090617 |
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| Code: | *-----------*
|...|27.|.1.|
|2.8|9..|..3|
|...|...|..9|
|---+---+---|
|1.4|35.|..7|
|..3|...|5..|
|5..|.19|3.2|
|---+---+---|
|9..|...|...|
|8..|..1|4.5|
|.4.|.38|...|
*-----------*
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Play/Print this puzzle online |
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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy
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| Posted: Wed Sep 06, 2017 7:08 am Post subject: |
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Hi everyone,
| Code: |
+-----------+-------------+-----------+
| 3 56 9 | 2 7 56 | 8 1 4 |
| 2 1 8 | 9 46 456 | 67 567 3 |
| 4 7 56 | 1 8 3 | 26 256 9 |
+-----------+-------------+-----------+
| 1 29 4 | 3 5 26 | 69 8 7 |
| 6 29 3 | 8 24 7 | 5 49 1 |
| 5 8 7 | 46 1 9 | 3 46 2 |
+-----------+-------------+-----------+
| 9 356 156 | 467 246 246 | 17 37 8 |
| 8 36 26 | 67 9 1 | 4 237 5 |
| 7 4 12 | 5 3 8 | 129 29 6 |
+-----------+-------------+-----------+
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Play this puzzle online at the Daily Sudoku site
| Quote: | | XY-Wing 2,4,6 in r25c5,r4c6 and -5 in r12c6 |
Ciao Gianni |
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Ajò Dimonios
Joined: 01 May 2017
Posts: 339
Location: Sassari Italy
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| Posted: Wed Sep 06, 2017 8:55 am Post subject: |
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Hi Gianni
Gianni Wrote:
| Quote: | | -Wing 2,4,6 in r25c5,r4c6 and -5 in r12c6 |
I do not understand. It is impossible that both 5 of column 6 are false.
Most likely you've traded the 5 with 6
My solution
[(6-2)R7C5=(2)R5C5-(2)R4C6 and (6)R7C5-(6=4)R2C5-(4)R2C6=NP(56)R12C6-(6)R4C6 or (6)R7C5-(6)R78C4=(6)R6C4-(6)R4C6]=>contradiction R4C6=Ø=>-6R7C5=>stte.
or
[(5)R1C2-(5=6)R1C6-(6=2)R4C6-(2)R5C5 and (5)R1C2-(5)R1C6=(5-4)R2C6=(4)R2C5-(4)R5C5]=>contradiction R5C5=Ø=>-5R1C2=>stte.
or
AIC (4=6)R2C6-(6=2)R4C6-(2=4)R5C5-(4)R2C5=>-4R2C5=>stte
Ciao a Tutti
Paolo |
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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy
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| Posted: Wed Sep 06, 2017 12:46 pm Post subject: |
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Hi Paolo,
Of course, I pressed 5 instead of 6;
in fact, the rules of XY-Wing provide for the elimination of the number common to the two wings cells.
Ciao Gianni |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Sep 07, 2017 1:34 am Post subject: |
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| Here's another vote for the 24-6 XY-Wing. I originally decided not to use it, but alternative solutions were hard to find. |
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