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Set N Puzzle 3 -- VH/VH+

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Wed Jan 28, 2009 9:05 pm Post subject: Set N Puzzle 3 -- VH/VH+

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Code:

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

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

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wapati

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

Posted: Thu Jan 29, 2009 2:43 pm Post subject:

This one is tough to do without using a VH+. I did it with an x-wing, an xyz-wing, an xy-wing and a UR1. You might not like the xy-wing as it uses 3 boxes to eliminate in a fourth.

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Marty R.

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

Posted: Thu Feb 05, 2009 5:29 pm Post subject:

I used a variety of techniques, including ERs, URs, W- and X-Wing and finished it off with a very short XY-Chain.

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tlanglet

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

Posted: Fri Feb 06, 2009 2:57 pm Post subject:

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I may have messed up basics because it only took me three VH+ steps.

Code:

*--------------------------------------------------------------------*
| 5 346 7 | 1369 14 69 | 8 2 349 |
| 348 9 368 | 3568 45 2 | 1 7 34 |
| 1 348 2 | 389 7 89 | 5 6 349 |
|----------------------+----------------------+----------------------|
| 23489 3468 368 | 1689 12 689 | 7 34 5 |
| 234 346 1 | 56 25 7 | 9 34 8 |
| 89 7 5 | 89 3 4 | 2 1 6 |
|----------------------+----------------------+----------------------|
| 7 2 9 | 4 8 3 | 6 5 1 |
| 6 5 4 | 7 9 1 | 3 8 2 |
| 38 1 38 | 2 6 5 | 4 9 7 |
*--------------------------------------------------------------------*

A skyscraper on <6> in r25c4, which opens up
a x-wing on <8> in r26c14, which then opens
a xy-wing <245> with pivot <25> in r5c5.

Ted

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Fri Feb 06, 2009 6:02 pm Post subject:

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tlanglet wrote:

I may have messed up basics because it only took me three VH+ steps.

A skyscraper on <6> in r25c4, which opens up
a x-wing on <8> in r26c14, which then opens
a xy-wing <245> with pivot <25> in r5c5.

No mess up. You matched my VH+ solution.

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