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Set NNP Puzzle 90

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Sun Jan 25, 2009 6:12 pm Post subject: Set NNP Puzzle 90

Code:

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

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/Sashimi 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: Sun Jan 25, 2009 9:48 pm Post subject:

Code:

.---------------------.---------------------.---------------------.
| 6 5 4 | 9 7 1 | 2 8 3 |
| 3 2 8 | 6 4 5 | 9 7 1 |
| 9 1 7 | 2 3 8 | 4 5 6 |
:---------------------+---------------------+---------------------:
| 1 8 9 | 3 5 2 | 67 46 47 |
| 2 6 3 | 47 9 47 | 58 1 58 |
| 7 4 5 | 18 18 6 | 3 2 9 |
:---------------------+---------------------+---------------------:
| 4 9 2 | 1578 18 37 | 15678 36 578 |
| 5 37 6 | 1478 2 347 | 178 9 478 |
| 8 37 1 | 457 6 9 | 57 34 2 |
'---------------------'---------------------'---------------------'

UR {1,8} removes 1 and 8 from r7c4
then the DP {1,8} in r68c4, r67c5, r78c7... forces 8 to exist in r5c7, or the DP exists.
then two xy-wings

tlanglet

Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

Posted: Mon Jan 26, 2009 12:48 am Post subject:

Still another long, great puzzle. I used a total of six steps as follows:

Quote:

Type 1 UR<18>, Type 4 UR<58>, Type 6 UR<57> with two strong links, a xy-wing<367> with a pseudo-cell, a xy-wing<347> with a pseudo-cell and finally a BUG+1.

A wonderful set of puzzles you submitted today Danny!

Ted Very Happy

daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Mon Jan 26, 2009 12:58 am Post subject:

tlanglet wrote:

A wonderful set of puzzles you submitted today Danny!

Thanks for the compliment. Yes, it does seem that everyone was having fun with the puzzles today. Im glad. Very Happy

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