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Set NNP Puzzle 98

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Tue Jan 20, 2009 10:26 am    Post subject: Set NNP Puzzle 98 Reply with quote

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

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: Tue Jan 20, 2009 7:39 pm    Post subject: Reply with quote

Code:
.---------------------.---------------------.---------------------.
| 6      1      9     | 23     7      235   | 24     245    8     |
| 578    2     W78    | 4      9     5-6    |W67     3      1     |
| 57     4      3     | 26     1      8     | 267    2567   9     |
:---------------------+---------------------+---------------------:
| 178    9     W78    | 5      3     W67    | 12467  12467  2467  |
| 17     6      2     | 8      4      9     | 5      17     3     |
| 3      5      4     | 67     2      1     | 9      8      67    |
:---------------------+---------------------+---------------------:
| 9      7      156   | 12     8      4     | 3      126    256   |
| 2      8      15    | 137    6      37    | 147    9      457   |
| 4      3      16    | 9      5      27    | 8      1267   267   |
'---------------------'---------------------'---------------------'

w-wing on the marked {6,7} removes 6 from r2c6
leaves a UR type 1 on {7,8} r24c13 places 1 in r4c1
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tlanglet



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

PostPosted: Wed Jan 21, 2009 3:05 pm    Post subject: Reply with quote

Norm,

I had a similar solution, but in reverse order. The UR78 in r24c13 has an x-wing on <8> overlay that deletes <7> from r24c1 giving the code:
Code:

 *--------------------------------------------------------------------*
 | 6      1      9      | 23     7      235    | 24     245    8      |
 | 58     2      T78    | 4      9      56     | W67    3      1      |
 | 57     4      3      | 26     1      8      | 267    2567   9      |
 |----------------------+----------------------+----------------------|
 | 18     9      T78    | 5      3      6-7    | 12467  12467  2467   |
 | 17     6      2      | 8      4      9      | 5      17     3      |
 | 3      5      4      | W67    2      1      | 9      8      67     |
 |----------------------+----------------------+----------------------|
 | 9      7      156    | 12     8      4      | 3      126    256    |
 | 2      8      15     | 137    6      37     | 147    9      457    |
 | 4      3      16     | 9      5      27     | 8      1267   267    |
 *--------------------------------------------------------------------*


Then I used a useless w-wing <67> as marked with strong link <6> in box <2> to transport <7> in pincer r2c7 to r4c3 thereby deleting <7> from r4c6.

Ted
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