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prakash
Joined: 02 Jan 2008
Posts: 67
Location: New Jersey, USA
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 Posted: Fri Apr 18, 2008 12:35 am Post subject: April 18 VH - Wing It |
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| For me, this one required a lot of advanced techniques. An X-Wing in 8, an XY-Wing 46-45-56, An X-Wing on 7 and an XYZ wing 46-467-47. I am sure there is a better way. Not really understanding ERs, I did not try to find any. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Apr 18, 2008 5:08 am Post subject: |
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| I don't know about ERs in this one, I didn't look for them. But the X-Wing on 7 and a W-Wing on 47 did the trick. |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Fri Apr 18, 2008 6:03 am Post subject: |
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x-wing on 7
xy-wing 4,5,6
xyz-wing 4,6,7 in box 5 |
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Johan
Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium
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| Posted: Fri Apr 18, 2008 7:52 am Post subject: |
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I found a 4-cell xy-chain (64-47-75-56) with pincer ends at R6C4(A) and R5C8(D), which eliminates <6> in R5C4, that collapses the whole puzzle.
| Code: | +-------------------------+-------------------------+-------------------------+
| 3578 4 357 | 1 39 2 | 568 567 3569 |
| 378 1 9 | 5 6 347 | 48 2 34 |
| 2 6 357 | 47 B 389 3478 | 1 C 57 3459 |
+-------------------------+-------------------------+-------------------------+
| 367 9 8 | 2 35 37 | 456 1 456 |
| 1 37 3467 | 4-[6]7 358 3478 | 9 D 56 2 |
| 46 5 2 | 46 A 1 9 | 7 3 8 |
+-------------------------+-------------------------+-------------------------+
| 9 8 56 | 3 2 1 | 56 4 7 |
| 45 2 145 | 8 7 6 | 3 9 15 |
| 367 37 1367 | 9 4 5 | 2 8 16 |
+-------------------------+-------------------------+-------------------------+ |
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sdq_pete
Joined: 30 Apr 2007
Posts: 119
Location: Rotterdam, NL
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| Posted: Fri Apr 18, 2008 12:54 pm Post subject: |
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| storm_norm wrote: | x-wing on 7
xy-wing 4,5,6
xyz-wing 4,6,7 in box 5 |
ditto. Not sure the X-wing on 7 was really necessary.
Peter |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Apr 18, 2008 1:19 pm Post subject: |
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| sdq_pete wrote: |
Not sure the X-wing on 7 was really necessary.
Peter |
Peter,
I used the x-wing to remove the <7> at r1c9 to make that cell a <3>. Then, r1c9=<3>=>r9c2=7=>r5c2=3 thereby eliminating the <3> at r5c3 which is needed for the <467> xyz-wing in box 5.
Ted
Last edited by tlanglet on Fri Apr 18, 2008 9:26 pm; edited 1 time in total |
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Stanley P
Joined: 27 Feb 2008
Posts: 20
Location: Tennessee, USA
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| Posted: Fri Apr 18, 2008 1:47 pm Post subject: |
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| I did the wing thing on this one successfully. From an efficiency standpoint it appears that the xy-chain is quite a bit better. I usually look for xy-chains after getting frustrated trying to find wings. Maybe I should reverse the order and look for chains first. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Fri Apr 18, 2008 6:32 pm Post subject: |
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OK - I need serious help. I found an x-wing, an xy-wing and an xyz wing.
I also found two ERs for <5> and <7>. That's more than the rest of you put together - and yet I can't get past this point. If I stare at it any longer I could damage something. I reckon I'm missing something (maybe the left side of the brain!)
| Code: |
+----------+-----------+-----------+
|3578 4 357| 1 39 2 |68 567 3569|
|378 1 9 | 5 6 347 |48 2 34 |
| 2 6 357|47 389 348 | 1 57 3459|
+-------+--------------+-----------+
|367 9 8 | 2 35 37 |456 1 456|
| 1 37 347|467 358 348| 9 56 2 |
|46 5 2 |46 1 9 | 7 3 8 |
+----------+-----------+-----------+
| 9 8 56| 3 2 1 |56 4 7 |
|45 2 145| 8 7 6 | 3 9 15 |
|37 37 16| 9 4 5 | 2 8 16 |
+----------+-----------+-----------+
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Fri Apr 18, 2008 7:33 pm Post subject: |
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Check out the X-Wing on 7 in rows 2 and 4.
(Edited to correct "rows 2 and 5" to "rows 2 and 4").
Last edited by Marty R. on Sat Apr 19, 2008 12:50 am; edited 1 time in total |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Fri Apr 18, 2008 8:05 pm Post subject: |
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| Quote: | | Check out the X-Wing on 7 in rows 2 and 5. |
I don't believe it! I was staring at this thing for at least an hour. Also I have often thought x-wings are so easy to spot, they don't deserve to be in the Very Hard category. Can't win 'em all eh! |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Fri Apr 18, 2008 8:40 pm Post subject: |
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| 'ang about !! My xyz wing is <347> from box2. Using the x-wing on 7s on my grid, I don't see any <467> xyz in Box 5 mentioned above. Maybe it's not me! |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Fri Apr 18, 2008 9:24 pm Post subject: |
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| cgordon wrote: | | 'ang about !! My xyz wing is <347> from box2. Using the x-wing on 7s on my grid, I don't see any <467> xyz in Box 5 mentioned above. Maybe it's not me! |
As I indicated in my earlier message, I needed the x-wing on <7> to "create" the <467> xyz-wing. xyz <467> is in r5c4 and xz <46> is in r6c4 as given in the code you posted. yz <47> is in r5c3 once the <3> is removed from that cell via the x-wing elimination of <7> in r9c1 and the basic eliminations that result from it.
Ted |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Fri Apr 18, 2008 9:56 pm Post subject: |
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| Thank you Ted. Based on my struggles with this one, I think they should give me a good meal and put me down. |
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crunched
Joined: 05 Feb 2008
Posts: 168
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| Posted: Fri Apr 18, 2008 10:51 pm Post subject: |
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| Marty R. wrote: | | Check out the X-Wing on 7 in rows 2 and 5. |
I hope you mean rows 2 & 4 (not rows 2 and 5), which would take out some 7s in column 1? Otherwise, I am lost. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Apr 19, 2008 12:48 am Post subject: |
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| crunched wrote: | | Marty R. wrote: | | Check out the X-Wing on 7 in rows 2 and 5. |
I hope you mean rows 2 & 4 (not rows 2 and 5), which would take out some 7s in column 1? Otherwise, I am lost. |
Yes, sorry for the typo. |
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Glassman
Joined: 21 Oct 2005
Posts: 50
Location: England
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| Posted: Sat Apr 26, 2008 10:18 pm Post subject: |
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What you all seem to have missed is the jellyfish (order 4 x-wing) on 7s — not that it solves the puzzle more quickly, but that it is such a rarity in order 9 puzzles. It is the first order 9 jellyfish I have found — and I felt like breaking out the champers!
In combination with the 456 xy-wing, the 7s jellyfish quickly resolves c2.
Thank you, Sam. 
Glassman  |
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