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Feb 1 VH

 
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Earl



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

PostPosted: Sun Feb 01, 2009 3:48 am    Post subject: Feb 1 VH Reply with quote

A skyscraper (3), OR an xyz-wing (357) will solve it a single step.

Early Earl
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Marty R.



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

PostPosted: Sun Feb 01, 2009 5:51 am    Post subject: Reply with quote

I saw the two Type 4 URs, so I played them, then finished it off with an XY-Wing (367).
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George Woods



Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK

PostPosted: Sun Feb 01, 2009 10:57 am    Post subject: or an ER Reply with quote

AN ER of 3 in box9 with strong linked 3s in row 3 solve it
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Wendy W



Joined: 04 Feb 2008
Posts: 144

PostPosted: Mon Feb 02, 2009 12:12 am    Post subject: Reply with quote

I just did 2 allegedly VH puzzles during the first quarter of the Super Bowl. Granted, it's not a very exciting game.
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Mon Feb 02, 2009 2:03 am    Post subject: Reply with quote

Wendy W wrote:
I just did 2 allegedly VH puzzles during the first quarter of the Super Bowl. Granted, it's not a very exciting game.

at least the steelers scored more points than I gave them credit for.
I was thinking it was going to be a lot more boring than it has been. the INT for a TD was the play of the game.
but then again, how exciting are Steelers games? eh?

oh that's right, the game is only a format for all the advertising. because afterall, the media will make more news out of the commercials than the game.
the shame is when the game loses its viewers because the commercials are better to watch.
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Wendy W



Joined: 04 Feb 2008
Posts: 144

PostPosted: Mon Feb 02, 2009 1:17 pm    Post subject: Reply with quote

U R right Norm! That was an unbelievable play to end the 1st half.
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sudocraz



Joined: 28 Apr 2008
Posts: 53

PostPosted: Tue Feb 03, 2009 10:20 pm    Post subject: Reply with quote

My husband and I are stuck on the Feb. 1 Very Hard. Sad We could not find the XYZ wing that is supposed to be there.

We do have a 357 as a pivot, but can't remove anything with it.

Unless we are doing it wrong, I was under the impression that in the XYZ-Wing, the pivot and both of the pincers have to 'see' the Z to remove it. In other words for the XYZ wing to work properly- the pivot, one of the
pincers and the Z must be in the same block and the other pincer must be in the same row or column as the Pivot and the numbers that can be removed.

Am I wrong?
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Marty R.



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

PostPosted: Tue Feb 03, 2009 10:55 pm    Post subject: Reply with quote

Quote:
Unless we are doing it wrong, I was under the impression that in the XYZ-Wing, the pivot and both of the pincers have to 'see' the Z to remove it. In other words for the XYZ wing to work properly- the pivot, one of the
pincers and the Z must be in the same block and the other pincer must be in the same row or column as the Pivot and the numbers that can be removed.


XYZ and either XZ or YZ are in the same box and the other cell (XZ or YZ) is in the same row/column as the XYZ. Any "Z" that sees all three of XYZ-XZ-YZ is removed. The removed number is in the same box and same row-column as XYZ. It's possible that two numbers can be removed, but it's usually just one. Here's an example:

Code:

+-------+----------+-------+
| . . . | .   . .  | . . . |
| . . . | .   . .  | . . . |
| . . . | .   . .  | . . . |
+-------+----------+-------+
| . . . | .   . .  | . . . |
| . . . | 12  . .  | . . . |
| . . . | .   . .  | . . . |
+-------+----------+-------+
| . . . | 15  . .  | . . . |
| . . . | 14  . 13 | . . . |
| . . . | 123 . .  | . . . |
+-------+----------+-------+

Play this puzzle online at the Daily Sudoku site

The 1s from r78c4 are removed.
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sudocraz



Joined: 28 Apr 2008
Posts: 53

PostPosted: Wed Feb 04, 2009 2:39 am    Post subject: Reply with quote

Thanks Marty, that is what I thought.

Regards
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