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March 23 -vh

 
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Mindwarp



Joined: 13 Sep 2007
Posts: 25
Location: St. Ives, England

PostPosted: Sun Mar 23, 2008 1:40 am    Post subject: March 23 -vh Reply with quote

Have I made a mistake somewhere, it only took me 5 minutes and 5 seconds to solve this one?
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria

PostPosted: Sun Mar 23, 2008 9:17 am    Post subject: Reply with quote

For me, it took considerably longer.

Not at the beginning: the puzzle practically solved itself...

But there IS a position where "vh" techniques are needed:

Code:

+--------------------------+--------------------------+--------------------------+
| 5       49      6        | 3       7       18       | 2       14      89       |
| 49      8       1        | 6       49      2        | 5       7       3        |
| 3       7       2        | 49      18      5        | 146     146     89       |
+--------------------------+--------------------------+--------------------------+
| 6       1       3        | 8       5       4        | 9       2       7        |
| 2       5       7        | 1       6       9        | 3       8       4        |
| 49      49      8        | 2       3       7        | 16      5       16       |
+--------------------------+--------------------------+--------------------------+
| 7       2       49       | 5       149     136      | 8       1346    16       |
| 1       3       5        | 7       48      68       | 46      9       2        |
| 8       6       49       | 49      2       13       | 7       13      5        |
+--------------------------+--------------------------+--------------------------+


What with all those 49 pairs arond, I spent too much time looking for URs
In the end I settled for this route: x-wing plus some more coloring

Only when I prepared the grid for posting I found out that there is an xyz wing which solves the puzzle in one step.

So could have been solved real fast if you hit the xyz wing right away.
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Victor



Joined: 29 Sep 2005
Posts: 207
Location: NI

PostPosted: Sun Mar 23, 2008 10:58 am    Post subject: Reply with quote

No nice hint with ensuing joke this time, Nataraj! (Tried to think of some other joke about 16 & squares or roots or something but I guess it was all said.)
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cgordon



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

PostPosted: Sun Mar 23, 2008 12:28 pm    Post subject: Reply with quote

Four very hards in 8 days - no wonder my wife asked me why I was smiling this morning.

Anyway, I found a plethora of ERs for 1's and 4's but the one that solved it was for 4's using R8 and Box 2. This got rid of the 4 in R3C7 and left a Type 2 UR for 136 in R79.

Nice one !!
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tlanglet



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

PostPosted: Sun Mar 23, 2008 12:44 pm    Post subject: Reply with quote

First, I found a X-wing in r19c68 that eliminated a couple of 1's including one at r7c6. Then I spotted a XY-wing on 136 with pivot at r7c6 and pincers at r9c6/r7c9 that removed a 1 at r9c8 which broke it open.

Ted
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cgordon



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

PostPosted: Sun Mar 23, 2008 1:41 pm    Post subject: Reply with quote

....actually I looked at this one again and saw a one step ER solution for 4's using the two 4's in C7 and the ER (or hinge) in Box 2 which eliminates the 4 in R8C5. Plain sailing after that.
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TexCat



Joined: 07 Jul 2006
Posts: 31

PostPosted: Sun Mar 23, 2008 2:39 pm    Post subject: Reply with quote

I used the skyscraper of 4's in columns 4 and 7 that eliminates the same 4 in R8C5.
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Marty R.



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

PostPosted: Sun Mar 23, 2008 3:34 pm    Post subject: Reply with quote

A Type 4 UR and a kite on 4 did it for me.
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A.J.



Joined: 21 Mar 2008
Posts: 5
Location: San Diego, CA

PostPosted: Sun Mar 23, 2008 11:15 pm    Post subject: Reply with quote

I also found the skyscraper in 4's in column 4 and 7 and it fell out quickly after that. Smile
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Mon Mar 24, 2008 2:10 am    Post subject: Reply with quote

x-wing on 1

xy-wing {1,3,6}

the grid at this point is also a BUG.
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Clement



Joined: 24 Apr 2006
Posts: 935
Location: Dar es Salaam Tanzania

PostPosted: Mon Mar 24, 2008 8:18 am    Post subject: Sun 23-Mar-2008 VH Reply with quote

I find the solution by tlanglet the best. X-Wing & XY-Wing.
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cgordon



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

PostPosted: Mon Mar 24, 2008 11:40 pm    Post subject: Reply with quote

Quote:
I find the solution by tlanglet the best. X-Wing & XY-Wing.


Actually I would nominate TexCat's initial skyscraper. Surely the solution with the fewest and most simple techniques has to be the "best".
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prakash



Joined: 02 Jan 2008
Posts: 67
Location: New Jersey, USA

PostPosted: Tue Mar 25, 2008 1:09 am    Post subject: Reply with quote

Quote:

Actually I would nominate TexCat's initial skyscraper. Surely the solution with the fewest and most simple techniques has to be the "best".


It looks like someone doesn't like XY-wings.
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nataraj



Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria

PostPosted: Tue Mar 25, 2008 6:40 am    Post subject: Reply with quote

cgordon wrote:
Surely the solution with the fewest and most simple techniques has to be the "best".


Hm.

Think of a movie. Let's say, something like "Iron Monkey", "Tai Chi Boxer", or the more recent and better known "Crouching Tiger, Hidden Dragon".

Good guy/gal and bad guy/gal stand opposite each other. Then they fight it out over an extended period of time, going up walls, flying through the air, using all sorts of weapons and their bare hands (and ruining most of the furniture in the process).

Think of another script for that scene: guy pulls out a gun. bang.

Better?

Now that's a bit extreme, of course. All I'm saying is that good/better implies a set of values. And those tend to be different from person to person, so I'm not so sure about that "surely" Smile
__

BTW, if I remember correctly, the second route was taken by Indiana Jones in a bazaar. A hilarious scene, just because of the unexpected "simple, yet efficient" method.
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cgordon



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

PostPosted: Tue Mar 25, 2008 11:45 am    Post subject: Reply with quote

Quote:
Think of a movie. Let's say, something like "Iron Monkey", "Tai Chi Boxer", or the more recent and better known "Crouching Tiger, Hidden Dragon".


Never liked “Crouching Tiger, Hidden Dragon” but I’ll concede that the violence in “A Clockwork Orange” was made the more elegant by the accompaniment of Beethoven and Gene Kelly. But then one could say
1*-1=-1 or one could say e^(pi*i) = -1. Should the solution be efficient or elegant? It gets sooo philosophical!
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CORUJA



Joined: 16 Jun 2007
Posts: 15
Location: BRUMADINHO - MG; BRAZIL

PostPosted: Wed Mar 26, 2008 2:03 pm    Post subject: Reply with quote

cgordon wrote:
Quote:
Think of a movie. Let's say, something like "Iron Monkey", "Tai Chi Boxer", or the more recent and better known "Crouching Tiger, Hidden Dragon".


Never liked “Crouching Tiger, Hidden Dragon” but I’ll concede that the violence in “A Clockwork Orange” was made the more elegant by the accompaniment of Beethoven and Gene Kelly. But then one could say
1*-1=-1 or one could say e^(pi*i) = -1. Should the solution be efficient or elegant? It gets sooo philosophical!


For me, the point is: am I enjoying myself ? Very Happy
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Wed Mar 26, 2008 6:05 pm    Post subject: Reply with quote

Quote:
Think of another script for that scene: guy pulls out a gun. bang.

Better?


its not elegant when watched from a standpoint of entertainment

however,

put yourself in that position, life at stake... I argue that the BANG method would probably feel like the most heavenly of elegant solutions.
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ravel



Joined: 21 Apr 2006
Posts: 536

PostPosted: Wed Mar 26, 2008 6:10 pm    Post subject: Reply with quote

cgordon wrote:
e^(pi*i) = -1
Thanks for reminding me on this great formula by Euler, more thqn 250 years old. Its really rarely known, after all it is said to be the nicest formula in mathematics (and everyone knows Einstein's formula).
Since Gauss said, that it would be obvious for anybody, who has talent for mathematics, its no wonder, that i did not become a mathematician Wink
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