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Salsa #4 -- Advanced

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Sat Jan 31, 2009 1:17 pm Post subject: Salsa #4 -- Advanced

Code:

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

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 X-Wing, Multiple Colors, Swordfish, M-Wing, W-Wing, XY-Chain

Extreme: Jellyfish, (but mostly) Chain

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Sat Jan 31, 2009 8:19 pm Post subject:

Code:

.---------------------.---------------------.---------------------.
| 1 6 7 | 238 238 4 | 5 9 238 |
| 5 8 29 | 1 67 239 | 67 4 23 |
| 3 29 4 | 5 67 289 | 1678 1678 128 |
:---------------------+---------------------+---------------------:
| 89 4 1 | 7 2389 6 | 38 238 5 |
| 6 39 5 | 2389 1 238 | 4 238 7 |
| 2 7 38 | 4 38 5 | 16 16 9 |
:---------------------+---------------------+---------------------:
| 7 23 2368 | 2368 5 1238 | 9 138 4 |
| 4 5 23689 | 23689 2389 1238 | 1378 1378 18 |
| 89 1 389 | 389 4 7 | 2 5 6 |
'---------------------'---------------------'---------------------'

skyscraper on 9 removes 9 from r9c4 and r8c3
w-wing {3,8}... (3=8)r9c4 - (8)r9c1 = (8)r4c1 - (8=3)r6c3; r9c3 <> 3
extended w-wing {2,3}...w-wing is in red...
(8=3)r6c5 - (3)r1c5 = (3)r2c6 - (3=2)r2c9 - (2)r2c3 = (2)r3c2 - (2=3)r7c2 - (3)r5c2 = (3)r6c3; r6c3 <> 8

Marty R.

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

Posted: Wed Feb 04, 2009 4:45 pm Post subject:

This was one of those bend-but-don't break puzzles that I enjoy. I used an assortment of moves with the finishing blow being a W-Wing with pincer transport.

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