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Set NNP Puzzle 20

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Sat Jan 24, 2009 3:43 pm    Post subject: Set NNP Puzzle 20 Reply with quote

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

Play this puzzle online at the Daily Sudoku site

===== ===== ===== ===== ===== ===== ===== ===== ===== New 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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wapati



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

PostPosted: Sat Jan 24, 2009 9:19 pm    Post subject: Reply with quote

I see a 4 cell xy-chain.

There are LOTS of other patterns here but they do much less. Nice puzzle!
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Marty R.



Joined: 12 Feb 2006
Posts: 5162
Location: Rochester, NY, USA

PostPosted: Fri Jan 30, 2009 4:58 pm    Post subject: Reply with quote

I got here after a couple of moves and was stuck.

Code:

+----------------+-------------+---------------+
| 25    9   3    | 124 7   124 | 6   158  158  |
| 7     1   8    | 9   5   6   | 24  3    24   |
| 256   26  4    | 3   8   12  | 7   15   9    |
+----------------+-------------+---------------+
| 1246  7   126  | 8   124 5   | 3   9    1246 |
| 3     8   12   | 124 6   9   | 5   7    124  |
| 12469 5   1269 | 7   124 3   | 124 1268 1468 |
+----------------+-------------+---------------+
| 8     24  5    | 6   124 7   | 9   12   3    |
| 126   3   1267 | 5   9   8   | 12  4    67   |
| 1269  246 1279 | 124 3   24  | 8   56   567  |
+----------------+-------------+---------------+

Play this puzzle online at the Daily Sudoku site

There was a potential deadly pattern in boxes 369 on 58-68-56. It was a pretty convoluted process, but every way to break the DP resulted in a 6 in r3c2 which solved the puzzle.
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