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Set J Puzzle 6

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Tue Jan 20, 2009 5:03 pm    Post subject: Set J Puzzle 6 Reply with quote

Code:
 +-----------------------+
 | 8 . 4 | . . . | 1 . . |
 | . 2 3 | . . 1 | . 5 . |
 | 1 6 5 | . 8 . | . . . |
 |-------+-------+-------|
 | . . . | 8 3 . | . 1 . |
 | . . 9 | 2 . . | . 8 . |
 | . 1 . | . . 9 | 7 . . |
 |-------+-------+-------|
 | 3 . . | . . 8 | 9 . . |
 | . 9 . | 3 6 . | . . 1 |
 | . . . | . . . | . 6 3 |
 +-----------------------+

Play this puzzle online at the Daily Sudoku site

===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== =====

Can be solved using steps from ...

Basics: Naked/Hidden Single, Naked Pair/Triple, Locked Candidate 1/2

Basics+: Naked Quad, Hidden Pair/Triple/Quad

VH: BUG+1, Remote Pair, UR Type 1, X-Wing, XY-Wing

Advanced: 2-String Kite, Empty Rectangle, Skyscraper, UR Type 2, XYZ-Wing

Extreme: finned X-Wing, Multiple Colors, M-Wing, W-Wing, XY-Chain

VH+AE: multi-step VH plus one Advanced and one Extreme step.

Extreme+: Swordfish, Jellyfish, (but mostly) Chain
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Wed Jan 21, 2009 6:41 am    Post subject: Reply with quote

Code:
.---------------------.---------------------.---------------------.
| 8      7      4     | 569    259    3     | 1      29     26    |
| 9      2      3     | 467    47     1     | 46     5      8     |
| 1      6      5     | 49     8      24    | 3      2479   47    |
:---------------------+---------------------+---------------------:
| 24567  45     27    | 8      3      67    | 2456   1      9     |
| 4567   3      9     | 2      1      67    | 456    8      45    |
| 26     1      8     | 45     45     9     | 7      3      26    |
:---------------------+---------------------+---------------------:
| 3      45     6     | 1      247    8     | 9      247    457   |
| 2457   9      27    | 3      6      245   | 8      247    1     |
| 2457   8      1     | 479    2479   245   | 245    6      3     |
'---------------------'---------------------'---------------------'

(2)... r9c7 = r4c7 - r6c9 = r6c1; r9c1 <> 2
(5)... r4c2 = r7c2 - r7c9 = r5c9; r4c7 <> 5
(2)... r9c7 = r7c8 - r3c8 = r3c6; r9c6 <> 2
w-wing {4,5}... (4=5)r4c2 - (5)r7c2 = (5)r7c9 - (5=4)r5c9; r4c7 <> 4
xy-wing {4,5,9} columns 4 and 5, removes 4 from r6c4 and r2c5 and finishes it.
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keith



Joined: 19 Sep 2005
Posts: 3179
Location: near Detroit, Michigan, USA

PostPosted: Wed Jan 21, 2009 8:06 am    Post subject: Reply with quote

XY: 2-67
XYZ: -456
SS: 2
XYZ: -457
SS: 5
SS: 2
XY: -459

Whew!

Keith
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Marty R.



Joined: 12 Feb 2006
Posts: 5166
Location: Rochester, NY, USA

PostPosted: Tue Jan 27, 2009 4:53 pm    Post subject: Reply with quote

I used seven steps, including XYZ, XY, Ws, ERs and finished with the same XY-Wing as Norm and Keith. I don't know what Keith's "SS" stands for.
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Tue Jan 27, 2009 5:14 pm    Post subject: Reply with quote

Marty R. wrote:
I don't know what Keith's "SS" stands for.

I'm putting my $$$ on Skyscraper.
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Marty R.



Joined: 12 Feb 2006
Posts: 5166
Location: Rochester, NY, USA

PostPosted: Tue Jan 27, 2009 5:57 pm    Post subject: Reply with quote

daj95376 wrote:
Marty R. wrote:
I don't know what Keith's "SS" stands for.

I'm putting my $$$ on Skyscraper.

Sounds likely.
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wapati



Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.

PostPosted: Tue Jan 27, 2009 6:00 pm    Post subject: Reply with quote

I did this one with a skyscraper on 2s, which sets up an xy-wing on 459.
Last, one more skyscraper on 2s.
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tlanglet



Joined: 17 Oct 2007
Posts: 2461
Location: Northern California Foothills

PostPosted: Wed Jan 28, 2009 1:02 am    Post subject: Reply with quote

I was stuck in an ER rut Exclamation

Three ERs on <2> and then a xy-wing459 did the trick.

Ted
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