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Set J Puzzle 15 -- VH+

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Sat Jan 31, 2009 1:14 pm    Post subject: Set J Puzzle 15 -- VH+ Reply with quote

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

Play this puzzle online at the Daily Sudoku site

===== ===== ===== ===== ===== ===== ===== ===== ===== Ratings

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, UR Type 1, X-Wing, XY-Wing, XYZ-Wing

VH+: 2-String Kite, Empty Rectangle, Remote Pair, Skyscraper, Colors, UR Type 2

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

Extreme: Jellyfish, (but mostly) Chain
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Sat Jan 31, 2009 8:56 pm    Post subject: Reply with quote

Code:
.---------------------.---------------------.---------------------.
| 5      2      4     | 7      6      13    | 139    18     1389  |
| 6      8      7     | 9      5      13    | 123    4      123   |
| 9      3      1     | 4      8      2     | 6      5      7     |
:---------------------+---------------------+---------------------:
| 1278   145    258   | 6      3      457   | 1259   12     12459 |
| 17     9      6     | 2      14     457   | 8      3      145   |
| 12     145    3     | 15     9      8     | 7      6      1245  |
:---------------------+---------------------+---------------------:
| 1238   6      258   | 1358   7      9     | 4      128    12358 |
| 4      7      58    | 1358   2      6     | 135    9      1358  |
| 238    15     9     | 38     14     45    | 23     7      6     |
'---------------------'---------------------'---------------------'

(1)... r6c4 = r5c5 - r9c5 = r9c2; r6c2 <> 1
(5)... r6c4 = r78c4 - r9c6 = r9c2; r6c2 <> 5
UR type 1 {1,3} removes 1 and 3 from r2c8
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tlanglet



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

PostPosted: Sun Feb 01, 2009 2:08 pm    Post subject: Reply with quote

Also a three-stepper:
Quote:
ER <1> pivot box <7> and strong link col <5>,
x-wing <2> r47c38,
kite <5> pivot box <5>

Ted
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keith



Joined: 19 Sep 2005
Posts: 3342
Location: near Detroit, Michigan, USA

PostPosted: Sun Feb 01, 2009 5:08 pm    Post subject: Reply with quote

X-wing <2>.
W-wing 1-5.
W-wing 1-5. (A different one.)

These W-wings can also be seen as XY-chains or extended XY-wings.

WX-XY-XY-WX with pincer W.

They happen to be
15-14-14-15, and
15-13-13-15.

Keith
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Marty R.



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

PostPosted: Tue Feb 03, 2009 5:37 am    Post subject: Reply with quote

I used a bunch of ERs, an X-Wing on 4 and finished with a UR on 13.
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