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Jul 9 VH

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Clement

Joined: 24 Apr 2006
Posts: 1111
Location: Dar es Salaam Tanzania

Posted: Sun Jul 08, 2012 11:25 pm Post subject: Jul 9 VH

After the Basics

Code:

+-----------------+-------------+-----------------+
| 2346 234 13468 | 145 3469 35 | 23689 7 2469 |
| 9 234 13468 | 14 346 7 | 2368 2346 5 |
| 346 5 7 | 8 369 2 | 369 1 469 |
+-----------------+-------------+-----------------+
| 467 479 469 | 3 2 8 | 1 5 4679 |
| 5 347 3-4 | 9 1 6 | 237 *24 8 |
| 1 8 2 | 7 5 4 | 369 369 69 |
+-----------------+-------------+-----------------+
| 37 6 5 | 2 37 9 | 4 8 1 |
| 8 2479 *49 | 6 47 1 | 5 #29 3 |
| 234 1 349 | 45 8 35 | 2679 269 2679 |
+-----------------+-------------+-----------------+

I used two XY-Wings:-
XY-Wing 24 29 49 pivoted in r8c8; r5c3<>4 which opens another
XY-Wing 27 47 24 pivoted in r5c2; r8c8<>2.

hughwill

Joined: 05 Apr 2010
Posts: 424
Location: Birmingham UK

Posted: Mon Jul 09, 2012 10:25 pm Post subject: Post subject: Jul 9 VH

Code:

+--------------+-------------+-----------------+
| 2346 234 18 | 145 3469 35 | 23689 7 2469 |
| 9 234 18 | 14 346 7 | 2368 2346 5 |
| 346 5 7 | 8 3469 2 | 369 1 469 |
+--------------+-------------+-----------------+
| 47 9 6 | 3 2 8 | 1 5 47 |
| 5 347 34 | 9 1 6 | 27 24 8 |
| 1 8 2 | 7 5 4 | 369 369 69 |
+--------------+-------------+-----------------+
| 37 6 5 | 2 37 9 | 4 8 1 |
| 8 247 49 | 6 47 1 | 5 29 3 |
| 234 1 349 | 45 8 35 | 2679 269 2679 |
+--------------+-------------+-----------------+

Play this puzzle online at the Daily Sudoku site

With the 369 triple in box 6 I got to this with basics.
The 347 xy pivot r4c1 did the same trick as Clement's
249 followed by his setting 247. Just proves that you
don't always need all the basics!

arkietech

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

Posted: Tue Jul 10, 2012 12:39 am Post subject:

I like one steppers Very Happy

Code:

*--------------------------------------------------------------------*
| 2346 234 18 | 145 3469 35 | 23689 7 2469 |
| 9 234 18 | 14 346 7 | 2368 2346 5 |
| 346 5 7 | 8 369 2 | 369 1 469 |
|----------------------+----------------------+----------------------|
| 47 9 6 | 3 2 8 | 1 5 47 |
| 5 b347 34 | 9 1 6 |a27 4-2 8 |
| 1 8 2 | 7 5 4 | 369 369 69 |
|----------------------+----------------------+----------------------|
| 37 6 5 | 2 37 9 | 4 8 1 |
| 8 c247 49 | 6 47 1 | 5 d29 3 |
| 234 1 349 | 45 8 35 | 679-2 269 2679 |
*--------------------------------------------------------------------*
m-wing
(2=7)r5c7-r5c2=(7-2)r8c2=2r8c8 => -2r5c8,r9c7; stte

either r5c7 is a 2 or r8c8 is a 2

Marty R.

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

Posted: Tue Jul 10, 2012 1:49 am Post subject:

Quote:

I like one steppers

So do I. But just as a personal preference, on these puzzles I try to use only the standard VH moves that are needed to solve them, i.e., X-, XY- and XYZ-Wings.

I used the same two wings as Clement.

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