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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sun May 24, 2009 6:49 pm Post subject: Puzzle NR_027 |
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| Code: | +-----------------------+
| 4 . . | . 9 . | . 8 5 |
| . 2 3 | . 4 8 | 6 7 . |
| . 8 . | . 3 5 | . 4 1 |
|-------+-------+-------|
| . . . | . . . | . . . |
| 1 3 5 | . 2 . | . 6 . |
| . 6 2 | . . 3 | . . 8 |
|-------+-------+-------|
| . 1 . | . . . | . . . |
| 2 5 9 | . 8 . | . . . |
| 6 . 8 | . . 2 | . . . |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Mon May 25, 2009 1:27 pm Post subject: |
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Three VH steps: | Quote: | xy-wing 137 with pivot 13 at r8c8,
x-wing 4 in r68c47,
kite 9 with hinge in box6
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Ted |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Mon May 25, 2009 2:35 pm Post subject: |
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Nice work Ted.  I was flying my kite wrong.  |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Tue May 26, 2009 4:58 am Post subject: |
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Ted,
is this your grid after the x-wing on 4?
I see a skyscraper on 9 in columns 6 and 7 eliminating the 9's from r9c4 and r7c8
| Code: | .---------------.---------------.---------------.
| 4 7 1 | 2 9 6 | 3 8 5 |
| 5 2 3 | 1 4 8 | 6 7 9 |
| 9 8 6 | 7 3 5 | 2 4 1 |
:---------------+---------------+---------------:
| 8 9 4 | 6 7 1 | 5 23 23 |
| 1 3 5 | 8 2 49 | 79 6 47 |
| 7 6 2 | 49 5 3 | 14 19 8 |
:---------------+---------------+---------------:
| 3 1 7 | 59 6 49 | 8 259 24 |
| 2 5 9 | 34 8 7 | 14 13 6 |
| 6 4 8 | 359 1 2 | 79 359 37 |
'---------------'---------------'---------------' |
which then leaves a BUG+1 grid and places 3 in r9c8 |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed May 27, 2009 4:38 am Post subject: |
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I used one of those mixed W-Wings, Kite (4), Hidden UR (59) and coloring (9).
I don't know if my grid looked like Norm's (although I'm more than capable of missing a skyscraper), but the hidden UR on 59 takes out the 9 from r9c8, opening up the coloring which takes out the 9 from r6c4. |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Wed May 27, 2009 12:48 pm Post subject: |
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| storm_norm wrote: | Ted,
is this your grid after the x-wing on 4?
I see a skyscraper on 9 in columns 6 and 7 eliminating the 9's from r9c4 and r7c8
| Code: | .---------------.---------------.---------------.
| 4 7 1 | 2 9 6 | 3 8 5 |
| 5 2 3 | 1 4 8 | 6 7 9 |
| 9 8 6 | 7 3 5 | 2 4 1 |
:---------------+---------------+---------------:
| 8 9 4 | 6 7 1 | 5 23 23 |
| 1 3 5 | 8 2 49 | 79 6 47 |
| 7 6 2 | 49 5 3 | 14 19 8 |
:---------------+---------------+---------------:
| 3 1 7 | 59 6 49 | 8 259 24 |
| 2 5 9 | 34 8 7 | 14 13 6 |
| 6 4 8 | 359 1 2 | 79 359 37 |
'---------------'---------------'---------------' |
which then leaves a BUG+1 grid and places 3 in r9c8 |
Norm, sorry to take so long to respond. I saw your original post but was distracted and then forgot it until Marty's post.
In reviewing my notes, I originally had the xy-wing 137, the x-wing 4, and then a hidden UR 59 followed by coloring on 9 as posted by Marty. But then I scratched out the last two steps and used a kite to delete 9 from r7c6. In reworking the puzzle, this clearly does not work. Not sure what I did, but the kite works if I failed to restore the 9 deleted by the hidden UR 59.
I normally verify my solutions before posting, but .................
Ted |
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