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NoName Puzzle 87 -- Advanced

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Mon Feb 16, 2009 8:40 pm Post subject: NoName Puzzle 87 -- Advanced

Last of the NoName/Salsa puzzles from this file.

Code:

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

Play this puzzle online at the Daily Sudoku site

===== ===== ===== ===== ===== ===== ===== ===== ===== Ratings are Accumulative

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, finned/Sashimi X-Wing

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

Extreme: Jellyfish, (but mostly) Chain

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Tue Feb 17, 2009 2:48 am Post subject:

Quote:

lets dispatch with the pleasantries
swordfish on 4
xyz-wing {1,7,8} box 2

Code:

.------------------.------------------.------------------.
| 6 2 18 | 9 4 178 | 17 3 5 |
| 19 5 49 | 2 13 137 | 6 8 147 |
| 134 138 7 | 18 5 6 | 14 9 2 |
:------------------+------------------+------------------:
| 1239 4 39 | 6 123 138 | 178 5 17 |
| 15 178 18 | 1478 9 1458 | 3 2 6 |
| 1235 1378 6 | 178 123 1358 | 148 14 9 |
:------------------+------------------+------------------:
| 8 9 34 | 13 6 2 | 5 7 14 |
| 7 6 2 | 5 8 14 | 9 14 3 |
| 134 13 5 | 34 7 9 | 2 6 8 |
'------------------'------------------'------------------'

Quote:

extended w-wing {1,4} removes 1 from r3c4
then singles...
another extended w-wing {1,4} finishes, removes 4 from r2c9

wapati

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

Posted: Tue Feb 17, 2009 5:39 am Post subject:

I like Norm's solution except I'd use a normal W-wing on 14 at the end to eliminate in r8c8.

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