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VH090617

 
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arkietech



Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA

PostPosted: Wed Sep 06, 2017 5:52 am    Post subject: VH090617 Reply with quote

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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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 515
Location: Rimini, Italy

PostPosted: Wed Sep 06, 2017 7:08 am    Post subject: Reply with quote

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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Quote:
XY-Wing 2,4,6 in r25c5,r4c6 and -5 in r12c6


Ciao Gianni
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Aj Dimonios



Joined: 01 May 2017
Posts: 339
Location: Sassari Italy

PostPosted: Wed Sep 06, 2017 8:55 am    Post subject: Reply with quote

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==>-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==>-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: 515
Location: Rimini, Italy

PostPosted: Wed Sep 06, 2017 12:46 pm    Post subject: Reply with quote

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

PostPosted: Thu Sep 07, 2017 1:34 am    Post subject: Reply with quote

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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