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Set NNP Puzzle 20

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Sat Jan 24, 2009 3:43 pm Post subject: Set NNP Puzzle 20

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

wapati

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

Posted: Sat Jan 24, 2009 9:19 pm Post subject:

I see a 4 cell xy-chain. There are LOTS of other patterns here but they do much less. Nice puzzle!

Marty R.

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

Posted: Fri Jan 30, 2009 4:58 pm Post subject:

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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