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Set NNP Puzzle 90

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Sun Jan 25, 2009 6:12 pm    Post subject: Set NNP Puzzle 90 Reply with quote

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

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/Sashimi 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: Sun Jan 25, 2009 9:48 pm    Post subject: Reply with quote

Code:
.---------------------.---------------------.---------------------.
| 6      5      4     | 9      7      1     | 2      8      3     |
| 3      2      8     | 6      4      5     | 9      7      1     |
| 9      1      7     | 2      3      8     | 4      5      6     |
:---------------------+---------------------+---------------------:
| 1      8      9     | 3      5      2     | 67     46     47    |
| 2      6      3     | 47     9      47    | 58     1      58    |
| 7      4      5     | 18     18     6     | 3      2      9     |
:---------------------+---------------------+---------------------:
| 4      9      2     | 1578   18     37    | 15678  36     578   |
| 5      37     6     | 1478   2      347   | 178    9      478   |
| 8      37     1     | 457    6      9     | 57     34     2     |
'---------------------'---------------------'---------------------'

UR {1,8} removes 1 and 8 from r7c4
then the DP {1,8} in r68c4, r67c5, r78c7... forces 8 to exist in r5c7, or the DP exists.
then two xy-wings
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tlanglet



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

PostPosted: Mon Jan 26, 2009 12:48 am    Post subject: Reply with quote

Still another long, great puzzle. I used a total of six steps as follows:
Quote:
Type 1 UR<18>, Type 4 UR<58>, Type 6 UR<57> with two strong links, a xy-wing<367> with a pseudo-cell, a xy-wing<347> with a pseudo-cell and finally a BUG+1.

A wonderful set of puzzles you submitted today Danny!

Ted Very Happy
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Mon Jan 26, 2009 12:58 am    Post subject: Reply with quote

tlanglet wrote:
A wonderful set of puzzles you submitted today Danny!

Thanks for the compliment. Yes, it does seem that everyone was having fun with the puzzles today. Im glad. Very Happy
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