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Oct 18 VH

 
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Earl



Joined: 30 May 2007
Posts: 677
Location: Victoria, KS

PostPosted: Sat Oct 18, 2008 3:02 am    Post subject: Oct 18 VH Reply with quote

An xyz-wing centered on R1C6 will solve it.

Earl
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat Oct 18, 2008 3:25 am    Post subject: Reply with quote

Just basics did it for me.
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keith



Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA

PostPosted: Sat Oct 18, 2008 3:59 am    Post subject: Reply with quote

I also had that XYZ-wing, taking out a <9>.

But, the hardest part was finding a pair in B3. Which results in three pairs in B3!

Keith
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

PostPosted: Sat Oct 18, 2008 4:25 am    Post subject: Reply with quote

Sorry to say, I also used the one-stepper xyz-wing on <179>. It seems to me that it has been over a week since the last VH, and then to have another one-stepper is a "downer".

Ted
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crunched



Joined: 05 Feb 2008
Posts: 168

PostPosted: Sat Oct 18, 2008 6:52 am    Post subject: Reply with quote

tlanglet wrote:
Sorry to say, I also used the one-stepper xyz-wing on <179>....
Ted


I never saw the 179 wing.
I used the 129 wing!

Code:

+------------+--------------+----------+
| 1267 268 4 | 5   129  179 | 19 3 78  |
| 17   3   9 | 6   8    17  | 45 2 45  |
| 127  28  5 | 29  3    4   | 19 6 78  |
+------------+--------------+----------+
| 8    1   3 | 49  49   6   | 7  5 2   |
| 5    9   6 | 3   7    2   | 8  4 1   |
| 4    7   2 | 1   5    8   | 6  9 3   |
+------------+--------------+----------+
| 29   4   7 | 8   6    3   | 25 1 59  |
| 269  5   8 | 249 1249 19  | 3  7 469 |
| 3    26  1 | 7   249  5   | 24 8 469 |
+------------+--------------+----------+

Play this puzzle online at the Daily Sudoku site
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cgordon



Joined: 04 May 2007
Posts: 769
Location: ontario, canada

PostPosted: Sat Oct 18, 2008 12:23 pm    Post subject: Reply with quote

<129> xyz wing for me. I challenge Marty's contention that it can be done with just basics. Retract that statement or pistols at dawn!
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crunched



Joined: 05 Feb 2008
Posts: 168

PostPosted: Sat Oct 18, 2008 4:20 pm    Post subject: Reply with quote

cgordon wrote:
<129> xyz wing for me. I challenge Marty's contention that it can be done with just basics. Retract that statement or pistols at dawn!


This is great. Thanks for taking this on. I will be there. I am selling tickets for the duel.
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Marty R.



Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA

PostPosted: Sat Oct 18, 2008 4:52 pm    Post subject: Reply with quote

cgordon wrote:
<129> xyz wing for me. I challenge Marty's contention that it can be done with just basics. Retract that statement or pistols at dawn!

You can keep your pistol holstered. Embarassed

Besides, I wouldn't do anything at dawn, not even go bass fishing. Very Happy
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tlanglet



Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

PostPosted: Sat Oct 18, 2008 11:25 pm    Post subject: Reply with quote

crunched wrote:
tlanglet wrote:
Sorry to say, I also used the one-stepper xyz-wing on <179>....
Ted


I never saw the 179 wing.
I used the 129 wing!

Code:

+------------+--------------+----------+
| 1267 268 4 | 5   129  179 | 19 3 78  |
| 17   3   9 | 6   8    17  | 45 2 45  |
| 127  28  5 | 29  3    4   | 19 6 78  |
+------------+--------------+----------+
| 8    1   3 | 49  49   6   | 7  5 2   |
| 5    9   6 | 3   7    2   | 8  4 1   |
| 4    7   2 | 1   5    8   | 6  9 3   |
+------------+--------------+----------+
| 29   4   7 | 8   6    3   | 25 1 59  |
| 269  5   8 | 249 1249 19  | 3  7 469 |
| 3    26  1 | 7   249  5   | 24 8 469 |
+------------+--------------+----------+


Just to close the loop, the xyz-wing on <179> is pivoted in r1c6, just one cell to the right of the <129> xyz-wing pivot cell. In fact, both xyz-wings eliminate the <9> in the others pivot cell.

Have a "Happy".

Ted
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smegly



Joined: 19 Oct 2008
Posts: 4
Location: Texas

PostPosted: Sun Oct 19, 2008 7:32 pm    Post subject: Reply with quote

Quote:

I never saw the 179 wing.
I used the 129 wing!

Code:

+------------+--------------+----------+
| 1267 268 4 | 5   129  179 | 19 3 78  |
| 17   3   9 | 6   8    17  | 45 2 45  |
| 127  28  5 | 29  3    4   | 19 6 78  |
+------------+--------------+----------+
| 8    1   3 | 49  49   6   | 7  5 2   |
| 5    9   6 | 3   7    2   | 8  4 1   |
| 4    7   2 | 1   5    8   | 6  9 3   |
+------------+--------------+----------+
| 29   4   7 | 8   6    3   | 25 1 59  |
| 269  5   8 | 249 1249 19  | 3  7 469 |
| 3    26  1 | 7   249  5   | 24 8 469 |
+------------+--------------+----------+



Never saw either of those! What was much more obvious was the W-wing comprised of [19]'s that told me that both couldn't resolved to 1 since that would leave no possibility of a 1 in column 5. That implies that a 9 has to exist in one of that [19] pair which eliminates the 9 in R1C6. From there it was all downhill as that created a pair of [17]'s in column 6 and immediately solves one of the [19]'s in the W-wing.

smegly
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