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Set NNP Puzzle 88

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Tue Jan 20, 2009 9:48 am Post subject: Set NNP Puzzle 88

Set No_Name_Please Embarassed

Code:

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

Play this puzzle online at the Daily Sudoku site

===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== =====

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, Remote Pair, UR Type 1, X-Wing, XY-Wing

Advanced: 2-String Kite, Empty Rectangle, Skyscraper, UR Type 2, XYZ-Wing

Extreme: finned X-Wing, Multiple Colors, M-Wing, W-Wing, XY-Chain

VH+AE: multi-step VH plus one Advanced and/or one Extreme step.

Extreme+: Swordfish, Jellyfish, (but mostly) Chain

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Tue Jan 20, 2009 8:40 pm Post subject:

Code:

.---------------------.---------------------.---------------------.
| 8 13 9 | 36 5 4 | 2 7 136 |
| 4 13 7 | 3689 2369 23689 | 36 1369 5 |
| 5 6 2 | 1 7 39 | 8 39 4 |
:---------------------+---------------------+---------------------:
| 1 89 5 | 2 36 3678 | 367 4 369 |
| 2 89 6 | 3578 4 13578 | 357 138 139 |
| 7 4 3 | 5689 169 15689 | 56 168 2 |
:---------------------+---------------------+---------------------:
| 9 2 1 | 57 8 57 | 4 36 36 |
| 6 5 8 | 4 139 139 | 19 2 7 |
| 3 7 4 | 69 1269 1269 | 19 5 8 |
'---------------------'---------------------'---------------------'

w-wing {3,6} in rows 1 and 2 eliminates a number of 6's in rows 1 and 2
leaves this grid

Code:

.---------------------.---------------------.---------------------.
| 8 13 9 | 6 5 4 | 2 7 13 |
| 4 13 7 |L38 239 2389 |L36 1369 5 |
| 5 6 2 | 1 7 39 | 8 39 4 |
:---------------------+---------------------+---------------------:
| 1 89 5 | 2 36 3678 | 367 4 369 |
| 2 89 6 | 3578 4 13578 | 357 138 139 |
| 7 4 3 |L58 169 15689 |L56 168 2 |
:---------------------+---------------------+---------------------:
| 9 2 1 | 57 8 57 | 4 36 36 |
| 6 5 8 | 4 13 13 | 9 2 7 |
| 3 7 4 | 9 26 26 | 1 5 8 |
'---------------------'---------------------'---------------------'

the marked xy-loop makes a number of eliminations. it eliminates all other 3's in row 2
6's in column 7
5's in r6
8's in column 4

after the dust settles, a xyz-wing finishes it

Marty R.

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

Posted: Wed Jan 21, 2009 5:59 am Post subject:

I used two W-Wings on 36 (different pairs), a Finned X-Wing on 3 and a Type 2 UR on 57 finished it off.

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