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prakash
Joined: 02 Jan 2008
Posts: 67
Location: New Jersey, USA
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 Posted: Wed Apr 16, 2008 12:20 am Post subject: April 16 VH |
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| I thought this would be a one trick wonder. After spotting the first xy-wing (24-47-27) I started plowing through assuming I was done. Surprise! There was the second xy waiting for me (39-36-69). On the whole a good one. |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Wed Apr 16, 2008 12:35 am Post subject: |
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| Code: | 2 368 58 | 1 469 346 | 7 389 359
13689 1368 7 | 2 5 36 | 4 1389 139
139 4 15 | 37 79 8 | 6 1239 12359
------------------------------------------------------------------
47 9 3 | 6 1 5 | 2 47 8
1678 1678 18 | 4 78 2 | 5 39 39
5 278 24 | 78 3 9 | 1 6 47
------------------------------------------------------------------
1348 12378 24 | 9 468 346 | 38 5 27
38 358 6 | 358 2 7 | 9 14 14
3478 23578 9 | 358 48 1 | 38 27 6 |
those xy-wings for sure the easiest route...
just for kicks, there is a type 3 UR present in the grid
the first xy-wing opens up a w-wing on {3,6} |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Wed Apr 16, 2008 5:41 am Post subject: |
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For me, it was the xy-wing 24-47-72, and then a w-wing (39, strong link on 3 in first row).
I thoroughly enjoyed this one. |
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andras
Joined: 31 Oct 2007
Posts: 56
Location: Mid Wales
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| Posted: Wed Apr 16, 2008 7:31 am Post subject: |
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Actually the xy on 2,4,7 is all that I needed to break the puzzle (Pivot on R7C9).
It was a little slower to start than Monday's, but a good puzzle all the same.
John
(Edited for reasons of jealousy - my wife subsequently did it in about ten minutes and found no advanced techniques at all. And there are no mistakes in her answer - I checked!  ) |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Wed Apr 16, 2008 1:28 pm Post subject: |
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I thought this was very difficult. In an effort to impress, I tried looking for something other than wings. I found the Type 3 UR mentioned above - first time I've ever found one - but it did nothing. Ended up having to use two xy-wings <247> and <369>.
I'd bet the farm this cannot be done without advanced techniques. Sorry John, I think you and the missus just got lucky. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed Apr 16, 2008 1:40 pm Post subject: |
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I found the puzzle very time consuming!
After basics, I initially removed a useless <7> at r7c1 using coloring, then the previously reported Type 3 UR and the two xy-wings, but I seemed to make only small progress with each trick and had to essentially start the entire puzzle all over again.
Ted |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Wed Apr 16, 2008 4:38 pm Post subject: |
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| cgordon wrote: | | I'd bet the farm this cannot be done without advanced techniques. Sorry John, I think you and the missus just got lucky. |
Wouldn't bet the farm, but I concur. After the xy-wing and some cleanup, this is where advanced techniques are needed a second time:
| Code: |
+--------------------------+--------------------------+--------------------------+
| 2 36 8 | 1 69 4 | 7 39 5 |
| 369 1 7 | 2 5 36 | 4 8 39 |
| 39 4 5 | 37 79 8 | 6 1 2 |
+--------------------------+--------------------------+--------------------------+
| 4 9 3 | 6 1 5 | 2 7 8 |
| 678 678 1 | 4 78 2 | 5 39 39 |
| 5 78 2 | 78 3 9 | 1 6 4 |
+--------------------------+--------------------------+--------------------------+
| 1 2 4 | 9 68 36 | 38 5 7 |
| 38 358 6 | 358 2 7 | 9 4 1 |
| 378 3578 9 | 358 4 1 | 38 2 6 |
+--------------------------+--------------------------+--------------------------+
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play online |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Wed Apr 16, 2008 5:54 pm Post subject: |
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| tlanglet wrote: | I found the puzzle very time consuming!
After basics, I initially removed a useless <7> at r7c1 using coloring, then the previously reported Type 3 UR and the two xy-wings, but I seemed to make only small progress with each trick and had to essentially start the entire puzzle all over again.
Ted |
I feel ya, I have to look away for a few minutes just to get my eyes back in my head. concentrating on removing the candidates eliminated by the basic moves is time consuming. but its all worth it when you find that advanced move on the way. |
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Dart45
Joined: 16 Apr 2008
Posts: 17
Location: Canada
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| Posted: Wed Apr 16, 2008 8:22 pm Post subject: |
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| Hello all ... New to this site, but been solving the daily puzzles regularly. I never figured out what wings and all those other tricks of the trade were, but tried solving each day's puzzle as it came, without "pencil" marks or anything else. Just one square at a time! The Easy and Medium levels are never a problem, the Hard ones get me every once in a while, and the Very Hard ones are always a challenge - but most satisfying. Todays was no different - a very pleasant and satisfying challenge to solve outright. |
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